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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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does coolant matter?
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Mon, 10 February 2003 11:57
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I know for the 7M engines, unless you use an excellent quality coolant they develop hot spots in the engine which blows their head gaskets.
Is coolant that important in other engine types (read: 1jz) or will any decent quality coolant do?
also, would haveing an unsealed coke bottle as my radiator overflow bottle cause excessive coolant evaporation? I've lost a *lot* of coolant in the past 2 months, and I have a feeling that coke bottle is at least partly to blame (that and a few other issues making the car run hotter than it would like)
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: does coolant matter?
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Mon, 10 February 2003 12:08
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Oh dear........
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Location:
Brisbane
Registered:
December 2002
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Re: does coolant matter?
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Mon, 10 February 2003 12:23
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shit man of course coolant matters!! USE TOYOTA 7MGTE coolant! All these brands at supercheap bar NULON are no good...its better to use genuine stuff man...i think toyota make a specific coolant for 7mge/gte.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: does coolant matter?
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Mon, 10 February 2003 12:23
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not helpful GT :\
yes, I know it's dodgy and needs to be fixed... as do many things.
before i can put in an overflow bottle, I have to move the battery to the boot, and to do all that I need more spare time (without my car) than I currently have.
to fix the overheating problem.... well, let's not even get ito wiring up the new ecu and installing some thermo fans.
then there's replacing the water pump.... you get the idea
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: does coolant matter?
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Mon, 10 February 2003 12:24
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I assume this is only sold at toyota workshops?
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Location:
Brisbane
Registered:
December 2002
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Re: does coolant matter?
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Mon, 10 February 2003 12:25
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ur gonna have problems man take it off the road until ur done. Keep letting it run hot and u will hit a brick wall.
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Location:
Brisbane
Registered:
December 2002
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Re: does coolant matter?
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Mon, 10 February 2003 12:26
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get it from a toyota spare parts place...most dealreships have a service and spares division..i think it might be red colour...my 5me stuff is...and i think 7m was similar
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: does coolant matter?
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Mon, 10 February 2003 12:30
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well, that's a problem when you only own 1 car and work 6 days a week.
I'm taking tomorrow off to flush the radiator and put some (toyota) coolant in it.
that'll keep it happy until this saturday, when I can move the battery and put the overflow bottle in. The ecu ... well, Paul kindly volunteered his help with that when we both have spare time.
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: does coolant matter?
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Mon, 10 February 2003 12:48
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| draven wrote on Mon, 10 February 2003 23:23 |
not helpful GT :\
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Ok. Some brutal advice.
Stop asking advice for how to fix your car on the internet. You have managed to skillfully avoid mentioning that one of the 'little problems' is that your car is running in limp home mode.
Doctors can't give phone consults - it's bad practice because they can't see the full picture. Same here, you present one problem in isolation, when in fact it is part of a whole syndrome of problems.
Stop fucking around. Take your car to someone who knows what they're doing (it's clear you don't), otherwise you'll end up with a dead patient.
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Location:
Lost in the K hole
Registered:
May 2002
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Re: does coolant matter?
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Mon, 10 February 2003 22:18
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jeesus h christ...
'coolant' additive does absolutely nothing to help cool the engine. the toyota red stuff is an anti corrosive agent to help prevent oxidisation in the alloy heads. and fwiw robbo, there aint no 5me/7mgte/5sfe/etc specfic corrosion inhibitor. its all the same shit.
glycol and all that other stuff is basically antifreeze to stop you rupturing your cooling system if you happen to park your car in chicago overnight in the middle of winter.
the ONLY thing you can do with your cooling system to make it work better is to make sure the guts of it is clean to provide adequate heat transfer, and to improve flow. maximising air flow through the radiator is a good idea, as too is MAKING SURE YOUR ENGINE IS RUNNING PROPERLY to begin with.
the ONLY thing i can think of you can add to the raditor fluid to improve cooling is redline's "water wetter" which lowers the surface tension of the fluid, which makes the fluid adhere to the engine wall more closely, and helps prevent bubble formation and resultant spot boiling within the system.
get a clue guys!
yikes!
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: does coolant matter?
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Mon, 10 February 2003 23:15
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*thank you*!!!
that's all I was after.
I know what the problem is GT, but as I said I work 6 days a week and need my car to make it to saturday.
I'm after a 5 day fix.
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Location:
Wollongong
Registered:
May 2002
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Re: does coolant matter?
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Tue, 11 February 2003 01:52
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What colour coolant do you have in there at the moment Draven ?
My 1JZ uses red (I suspect from the factory) so I flushed and replaced mine with red.
NEVER mix red & green coolants. It will cause more trouble than its worth.
Also, a little side story, I wouldn't go putting green into an engine that previously had red (many Toyotas) because when I changed the coolant on my V6 Camry from red to green (with 2 full flushes in between) it constantly overheated. Only flushing and changing back to red fixed the problem. Not sure if this is applicable to your engine, but the info may come in help for you.
Also, I'd change the Coke bottle as soon as you can. Obviously not a desirable situation, but it's better than none at all.
After 12 months since flushing my cooling system, it hasn't needed any top ups at all (no leaks thank goodness) and has never overheated.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: does coolant matter?
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Tue, 11 February 2003 01:56
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yeah, mine has red in it.
where did you get your red coolant from?
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Location:
ACT
Registered:
December 2002
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Re: does coolant matter?
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Tue, 11 February 2003 02:01
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Hey ed_ma61...
I am in Canberra and have been looking for a supplier of redlines water wetter - do you have a supplier for that stuff in Sydney???
And Draven - if you have a 1j or 2j - flush your radiator clean (don't use any of that stripper shit - just lots of water) use only toyota red coolant and if you can add "redline water wetter".
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Location:
Wollongong
Registered:
May 2002
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Re: does coolant matter?
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Tue, 11 February 2003 06:23
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Toyota spare parts department will be able to help you out.
It should be in stock, since the Camry's use red coolant as standard.
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Location:
Brisbane
Registered:
December 2002
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Re: does coolant matter?
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Tue, 11 February 2003 08:28
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yeah any toyota place. Some workshops carry drums of it. My mechanic has drums of ford, toyota and holden genuine coolant. Yeah never mix coolants together. But having said that, if the cooling system is flushed properly you should be able to change to NULON green coolant. Every car i have owned bar my supra now and all my familys cars are run on NULON and have had no problem watsoever with heating. the only reason my supra is running on toyota is because it has has the head redone and toyota coolant was put in. Thats not to say the toyota coolant is bad. Not at all...nulon and genuine manufacturers coolants are the best. if you buy shit coolant you may as well use water. Also know that if you blow a hg, for the first 10k after you need to run the new hg in on only water...after that use coolant.
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: does coolant matter?
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Tue, 11 February 2003 10:44
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Hello all
for coolant use the same one that is used with the car. The reason is if you mix and match the different brands of coolant in the radiator would cause some major issues.
1. Different brands uses different levels of glycol in a set volume and they would have different additives which could cause reactions to the coolent which does major blockages in the radiator. It as happended to me when using factory coolent then flushing it and adding k-mart coolent (nulon).
62% of the radator was blocked so i had to flush it again after a week and replace the radator and paid someone to flush it properly.
2. Different brands of coolent might cause damage to the headgasket and other seals on the cooling system. The coolent might cause a reaction on the headgasket and water pump seal to destroy itself as i had personal experience from it.
Always use the same coolent which the came with.
so if you want to know coolent matters?
i hope this would make you decide.
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: does coolant matter?
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Tue, 11 February 2003 10:52
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Take a look at http://www.are.com.au Lots of useful information on there about this subject and others. Check it out.
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Registered:
May 2002
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Re: does coolant matter?
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Tue, 11 February 2003 12:12
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Martin,
If you can, drop into Toyota Phillip and see Mal Caldwell in parts...he is far and away the most knowledgable bloke I know for Toyota parts (Oz and imported).
I have dealt with him when buying consumables for both my 4AGE and my 1UZ...Imagine going to a place and asking "Have you got a timing belt for a Soarer 1UZ?" "Yep, in stock" "Err...what about a UZZ31 ancillary belt?" "Yep, got 'em in stock" etc etc.
A pleasure to deal with!
Oh, and BTW, they've always got some of the Toyota Long Life coolant (it's factory name) on hand.
Tell him "the bloke with the V8 Cressida" sent you...
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Location:
Madrid - Spain
Registered:
August 2002
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Re: does coolant matter?
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Tue, 11 February 2003 23:33
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If it is boiling, you might want to check your radiator cap. Apart from stopping all the coolant from spilling out, it's job is to make sure that the cooling system is running at the correct pressure. If the pressure is low, then the water will boil at a lower pressure -bad-. You may find that the 1jz runs at a higher pressure than a 7M or your cap is stuffed.
Probably a good idea to get the system pressure checked as well.
As far as airflow through the radiator is concerned, what most people forget that the air has to get out of the engine bay as well. Car manufacturers spend a lot of money looking at the aerodynamics of a cooling system and the hardest part to get right is getting rid of the pressure buildup in the engine bay
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Location:
Brisbane
Registered:
May 2002
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Re: does coolant matter?
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Tue, 11 February 2003 23:39
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| gold28 wrote on Wed, 12 February 2003 09:33 |
Car manufacturers spend a lot of money looking at the aerodynamics of a cooling system and the hardest part to get right is getting rid of the pressure buildup in the engine bay
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It's easy if you have an RA23/28... just leave the bonnet unlatched! 
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Location:
Madrid - Spain
Registered:
August 2002
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Re: does coolant matter?
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Tue, 11 February 2003 23:46
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But only on a 45+ day 
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Location:
ACT
Registered:
December 2002
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Re: does coolant matter?
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Wed, 12 February 2003 00:34
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Hey "Bloke with the V8 Cressida" 
I was wondering about the water wetter - Have been using 'red coolant' for a while and any toyota service place has it as far as I know.... Last year I emailed Redline Oils in the states and asked them for a list of stockers or distributers and they got back to me with a mob in perth - freighting from perth will end up costing the same as the 1L bottle itself!!
Thanks for the help tho
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: does coolant matter?
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Wed, 12 February 2003 00:42
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Wouldn't happen to be Coventry's here in Perth would it?
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: does coolant matter?
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Wed, 12 February 2003 07:58
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well, the ma61 has that nice bulge.
I was looking at that bulge near the windscreen, and was thinking it wouldn't be too hard to get a lot more air flowing out through there with minimal work.
anyone else thought of this, and found a glaring problem I've overlooked in my 5 minutes of deliberation?
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Location:
Brisbane
Registered:
January 2003
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Re: does coolant matter?
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Wed, 12 February 2003 08:29
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The most important is the chemical mix in the coolant, always use what the manufacturer specifies. Dad's civic had crack in the plastic radiator top tank so when I replaced that we didn't really want to pay for genuine, so I bought the same spec 50/50 ethylglycol mix (for all alloy engines) from a generic parts store and have had no problems so far (this was at least 6 months ago). The manual specified that other liquids could be used if they met that specification. But the manual also says certain fluids (Power steering fluid) can only be genuine.
If the engine manual for the engine you have says "genuine only" then you'd better use genuine. If the fluid is Red its red for a reason, i.e. don't use anything else but the red type. Like Brake fluid, they're colour coded so you know exactly what fluid to use.
my two cents anyway.
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Location:
Southern highlands - NSW
Registered:
January 2003
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Re: does coolant matter?
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Wed, 12 February 2003 09:02
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As a lot of people have already mentioned, the spec. of your coolant is important and the colour can also be an indicator, but with colour you really need to be careful. Eg- Some alloy friendly coolants are bright green, they work ok. You can get a dull green coolant put out by BMW I think, it is ment for large steel head diesels, it is very expensive and has some really impressive cooling properties (Cliamed 120 deg C boiling point at zero coolant pressure!!) great as it is, it WILL eat large holes in an Alloy head in a short period of time.
In short, read all the info before you use a coolant ( the no alloy head warning isn't huge on the above coolant)My car is up for a coolant change, genuine is gonna cost, MR2 needs 14 litres of the stuff, where in sydney area can I get the toyota stuff cheap?
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Location:
Lost in the K hole
Registered:
May 2002
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Re: does coolant matter?
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Wed, 12 February 2003 09:51
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toyota red comes in a can of about 300ml and only costs about $16! need about 1.5 cans to mix into 6L from memory! not exactly expensive...
every toyota spares dept should have it
ed
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