| Author | Topic |
|---|
Location:
Parramatta
Registered:
July 2002
|
|
overheating but not???
|
Sun, 10 October 2004 23:58
|
 |
ok this is a weird one i think its the head gasget but i cant be sure.
the reason i say this is the following
when i drive the car and i give it what for, ie hits boost for a little it overheats... but i when i baby it and dont hit boost i can drive it all day and the temprature it perfect.
i have change the thurmostat, flushed the radiator properly ie the tanks pulled aprart and fully inspected. there is plenty of coolent.
now this is strange but whats even stranger, is that i cant see any water in my oil but yet it drinks the coolent quite a bit.
its not comeout of the overflow... well it does when it starts overheating because its so pressurised???
the head gasget its a coper thick one as well so i have no idea? it has most of the symtopms of a blow head gasget but it dosnt act like its blown when babied???
help please
|
|
|
Location:
Epping, Sydney
Registered:
April 2003
|
|
Re: overheating but not???
|
Mon, 11 October 2004 00:40
|
|
Dude I think Andrew aka "RAV-GT4" has this exact same problem
but you don't want to know what it endedup being.. give him a quick PM he might be able to sort you out
|
|
|
Location:
Brisbane
Registered:
May 2002
|
|
Re: overheating but not???
|
Mon, 11 October 2004 01:02
|
|
Yep sounds like the headgasket is blown somewhere between a cylinder and a coolant gallery. Sometimes if it's a minor leak the symptoms will only present themselves when the engine is under load, ie higher cylinder pressures.
Get your coolant checked for combustion gases (any mechanic can do this for you, it's a simple test) and that will tell you for sure.
|
|
|
Location:
Parramatta
Registered:
July 2002
|
|
Re: overheating but not???
|
Mon, 11 October 2004 01:06
|
|
|
cheers boys
|
|
|
Location:
newcastle
Registered:
April 2004
|
|
Re: overheating but not???
|
Mon, 11 October 2004 01:14
|
|
not another one 
|
|
|
Location:
Parramatta
Registered:
July 2002
|
|
Re: overheating but not???
|
Mon, 11 October 2004 01:17
|
|
u blow one too??
the thing that shits me its that the motor is only 23k old...
bloddy cars!
|
|
|
Location:
newcastle
Registered:
April 2004
|
|
Re: overheating but not???
|
Mon, 11 October 2004 02:14
|
|
previous set up did
not 100% on reason why 
current set up with copper HG & o-ringed
block is going strong 
andrew in his RAV having a similar problem
but with a different HG
why are they all letting go at the same time?
we are all insane for owning them  
|
|
|
Location:
Parramatta
Registered:
July 2002
|
|
Re: overheating but not???
|
Mon, 11 October 2004 03:13
|
|
|
yeah thats the funny thing i have both my head an block o ringed too....
|
|
|
Location:
newcastle
Registered:
April 2004
|
|
Re: overheating but not???
|
Mon, 11 October 2004 03:21
|
|
you wouldn't think you could blow
that set up? 
what else could it be
|
|
|
I supported Toymods
Location:
Sydney, NSW
Registered:
February 2004
|
|
Re: overheating but not???
|
Mon, 11 October 2004 04:37
|
|
|
hoses?
|
|
|
Location:
Parramatta
Registered:
July 2002
|
|
Re: overheating but not???
|
Mon, 11 October 2004 05:47
|
|
|
nope because there is no leaks... only coolent from the overflow when its really pressurised... which is expected
|
|
|
Location:
Baulko Hillo
Registered:
April 2004
|
|
Re: overheating but not???
|
Mon, 11 October 2004 05:49
|
|
|
What ended up being the prob with Andrew's anyway?
|
|
|
Location:
newcastle
Registered:
April 2004
|
|
Re: overheating but not???
|
Mon, 11 October 2004 05:52
|
|
get it pressure tested as norbie said
only way to know 
by the way - new rad cap?
|
|
|
Location:
Parramatta
Registered:
July 2002
|
|
Re: overheating but not???
|
Mon, 11 October 2004 06:09
|
|
no its not that old the whole car only 75k and motor 23k
the cap has no craks or any sign of wear.
yeah will get pressure tested next week hopefully...
Slut i have PM'd andrew and hopefully will have an answer soon i will let u know
|
|
|
Location:
newcastle
Registered:
April 2004
|
|
Re: overheating but not???
|
Mon, 11 October 2004 06:32
|
|
|
good luck champ
|
|
|
Location:
sydney
Registered:
March 2004
|
|
Re: overheating but not???
|
Mon, 11 October 2004 06:49
|
|
possbile cooling system not bled properly?
air in cooling system will cause overheating, then after driving abit some air has gone to the top thats y u c coolant level low
even everytime u keeping topping it up u think u losing coolant but its just taken the space of the air
just a suggestion
|
|
|
Location:
Parramatta
Registered:
July 2002
|
|
Re: overheating but not???
|
Mon, 11 October 2004 08:03
|
|
mk1sc... i thought of this too, especially being an mr2 it has to travel far to get around... the amount of times i have filled it up... i have lost count... also as you mayt or may not know there is a little like tap thing at the top of one the tanks u under do it and release the pressure / air from it, i have done this until there is no air pressure and refil and repat for some time...
So the only things i can think of is head gasget, which i still cant understand how... the only other thing i can think of is the head could be warped!?
|
|
|
Location:
sydney
Registered:
March 2004
|
|
Re: overheating but not???
|
Mon, 11 October 2004 09:02
|
|
u need bit more patient when bleeding mr2s, try it once more this time spend a bit of time on it, much cheaper then doin the headgasket
there should be more then one bleeding valve, with my car i have 1 at radiator, 1 at heater tap, and 1 near the thermostat housing. where u fill must be at highest point so i jacked the car at the back up. turn heater to hot and fan on (important). then start the car and start filling coolant
coolant will start coming out of the lowest bleed valve first, so radiator, then heater tap then thermostat housing. when u see constant coolant running out of the radiator bleed valve, its done so close it, do same when u get constant coolant flow out of the other valves, then close it. to be safe + i had time i left it bled over an hr to make sure. ur heater must blow hot air aswell otherwise its not bled properly
when u install the thermostat, make sure the little hole is at higher point aswell for better bleeding purposes
|
|
|
Toymods member
I supported Toymods
Location:
Rydalmere, NSW
Registered:
May 2002
|
|
Re: overheating but not???
|
Mon, 11 October 2004 14:45
|
|
I can't figure it out either... my mechanic has done all of the above when he first put the gear into the car and what-not, only thing I could think of is either blown HG or warped head, but not after 6 weeks back on the road with very soft treatment (ok, occasional boosting here and there, but nothing serious).
Had a pressure test done on the radiator and while it was running it sucked the coolant down as was being filled gradually. The guys at BEL Garage (who did the test) reckon there's something up with the head gasket or the head. My thermostat functions as normal and the radiator is WAY higher than the level of the engine. 
It really has got me stumped. 
|
|
|
Location:
Sydney
Registered:
May 2004
|
|
Re: overheating but not???
|
Mon, 11 October 2004 21:22
|
|
this is what happened wiht my st162 3sge.. not sure if it would help you out.
but one time i noticed the radiator being low and thought it was really odd because i've never had a problem with it. I turned the car on and opened the radiator and noticed bubbles comming up. at first i thought shit its the head gaskit but i took it home and noticed a vacuum hose had come off. I'm not sure what it was connected to put it looked like coolant ran behind it. I put it back on and haven't had a problem since.
|
|
|
Location:
Parramatta
Registered:
July 2002
|
|
Re: overheating but not???
|
Tue, 12 October 2004 01:37
|
|
please if you can get a pic of where this was located/ connected to.... this could fix all our problems, Im sure i speak for andrew as well, we would be ever so greatful if this fixes our issues.
mk1sc - i have 2 bleed vavles on the radiator, 2 under the car where the pipes run to the motor. Nothing near the the turmostat that i can see(looked again last night). But these all have been played with to realase any air / pressure from all of these points, still nothing there, cheers for your help with this one.
|
|
|
Location:
Sydney
Registered:
May 2004
|
|
Re: overheating but not???
|
Tue, 12 October 2004 03:16
|
|
|
i sent you an email with the pic. (i just grabbed the first 3sge engine pic i could find off toymods)
|
|
|
Location:
Parramatta
Registered:
July 2002
|
|
Re: overheating but not???
|
Tue, 12 October 2004 06:38
|
|
|
thanks John, champion
|
|
|
Toymods member
I supported Toymods
Location:
Rydalmere, NSW
Registered:
May 2002
|
|
Re: overheating but not???
|
Tue, 12 October 2004 21:53
|
|
I'm gonna get some Toyota Red coolant and maybe a lower temperature thermostat to see if that helps. Meantime my mechanic is going to do a compression test on all cylinders to see if a new head gasket is needed or not.
Will find out soon enough.
|
|
|
Location:
Canberra
Registered:
January 2005
|
|
Re: overheating but not???
|
Thu, 13 January 2005 23:22
|
|
the exact same thing happened to me and then a few weeks later the water pump blew. it turns out that i would stop working when the car was driven hardish- causing the temperature to soar- then when i backed off it started working again.
hope this helps. this thread is kinda old ey
|
|
|
