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Location:
Terrigal
Registered:
May 2002
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Location:
Canberra
Registered:
May 2002
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Re: have i blown a piston/headgasket?
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Thu, 17 July 2003 13:50
 
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bugger mate! Blame the Commonwhore ute 
Even forgies can be broken. I seriously hope for your sake that you havnt busted one or two, but 60 degrees extra advance is a hell of a lot of timing on full noise. Why did the heater hose & welsh plug blow out? Is it possible that you've blown the head gasket between the combustion chamber & water gallery, pressurising the cooling system with the combustion pressure till something blew out to release it? Do you run a standard head gasket? If you have a tough bottom end, then the head gasket would usually be the first to fail with detonation....
A leakdown compression test would tell the story, but you could just try running it first with the radiator cap off to see if the water is bubbling from compression leakage into the cooling system... Then you could cross your fingers & hope its not pistons as well 
Good luck!
Phil
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Location:
CROMER, NSW
Registered:
May 2002
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Re: have i blown a piston/headgasket?
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Thu, 17 July 2003 22:36
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What have you done to johns motor.
Only kidding,bad luck have a look at number 4 for compression as in these motors it runs the hottest,KECOOP can attest to that.
See Ya
Paul
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Banned user
Location:
ADELAIDE - The Drift City
Registered:
July 2002
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Re: have i blown a piston/headgasket?
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Fri, 18 July 2003 00:53
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seriously... isnt it worth backing off for the sake of a good motor as soon as you hear some bad noises rather then beating a commie ute which you could do any day of the week?
i mean im sure you gave him a run for his money and all!!
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Location:
Terrigal
Registered:
May 2002
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Re: have i blown a piston/headgasket?
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Fri, 18 July 2003 01:23
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Ahh yeah of course I should have backed off.. But didn't so whats been done has been done.
Now working on fixing the damage.
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Location:
Perth
Registered:
May 2003
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Re: have i blown a piston/headgasket?
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Fri, 18 July 2003 01:27
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I did the same thing showing a p - plater in his bmw whos boss we stoped at some lights and when i took off my car sounded like an 8 (a very ratty  i pulled over and popped the hood my oil cap had poped off there was oil every where so i screwed it back on drove home, ends up being blown headgasket it had dropped to cylinders so my car was a 4cyl for a day! which is when the rebuild began.
It wouldnt go over 80 - was blowing lots of smoke
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Location:
Canberra
Registered:
May 2002
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Re: have i blown a piston/headgasket?
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Sat, 19 July 2003 07:15
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Strangely enough, of the 3 pistons i've broken in 3TGTE's, its never been #4. Have heard that it is usually the most common one to fail though.
Any news yet Joel?
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Location:
melbourne
Registered:
January 2003
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Re: have i blown a piston/headgasket?
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Sat, 19 July 2003 08:21
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Correct em if im wrong but doesnt a welsch plug falling out normally mean cracked block?
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Location:
Terrigal
Registered:
May 2002
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Location:
Melbourne
Registered:
May 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Sun, 20 July 2003 01:44
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Geeezzz dome tops  what compression ratio and boost are you runing ???
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Sun, 20 July 2003 02:23
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20psi by the original post
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Location:
Melbourne
Registered:
May 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Sun, 20 July 2003 03:31
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i wonder why it blew the gasket!!!!!  thats gota be more then 8.5:1 and 20psi!! farkkkkk
not only that the sharp edges on the flycuts and around the plug look very detonation encouraging... very clean tho running water injection? (no im not talking about the BHG )
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Location:
Terrigal
Registered:
May 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Sun, 20 July 2003 08:38
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From memory its around 7.9:1 compression ratio..
20psi and at full song its running around 8 degrees or ignition advance with no signs of detonation.
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Location:
Terrigal
Registered:
May 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Sun, 20 July 2003 08:39
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Forgot to mention.. No water injection.
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Location:
Brisbane
Registered:
November 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Sun, 20 July 2003 10:15
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| Quote: |
Repairing the blown headgasket.
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Oh... my... god. I hope you were joking. Is that a *GLUE GUN* I see????????????????????
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Location:
Terrigal
Registered:
May 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Sun, 20 July 2003 10:23
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Why? Whats wrong with hot glue?? 
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Location:
Canberra
Registered:
May 2002
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Re: have i blown a piston/headgasket?
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Sun, 20 July 2003 10:25
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Good to hear its just the head gasket mate! Time to get back to blasting the pants off commondoors! 
Why only 8 degrees advance at 20psi? The setup on my 3TGTE (same style forgies, CR, DFI, turbo, etc) happily wore 13 degrees at 19psi with no signs of pinging. Is that how much boost you were running at the dyno day?
Phil
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Location:
Terrigal
Registered:
May 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Sun, 20 July 2003 10:35
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Yeah not sure about the timing.. I should be questing the tuner a bit more maybe..
actually slightly mistaken though after looking again I think it is 13 degrees assuming my Kpa to Psi conversion is correct.
Here is the timing map :
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Location:
Canberra
Registered:
May 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Sun, 20 July 2003 10:47
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Nice how do you copy your autronic map into a post like that? Looks like it is 13 degrees, since 20 psi is approx 235 kpa (absolute pressure). Its amazing how much timing the different combustion chamber/piston designs can tolerate, by comparison, the 4AGTE wears an extra 9 degrees timing at the same load, and thats with 8.9:1 compression! You're gonna love the 3SGTE! (not that i'm bagging the 3TG )
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Location:
Terrigal
Registered:
May 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Sun, 20 July 2003 23:21
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Hi mate, yeah to copy it the maps I could never do that before but recently Autronic brought out a MS Windows version of the tuning software so with that I can just open up the maps and do a print screen.
Then paste the image into photoshop or any photo editing software really, crop it to size and save as a .jpg ..
I can't wait to get the 3S in.. That should be able to run more agressive timing like the 4A I hope. I went for 8.5:1 forged pistons which is the same spec it came with but got them .5mm OS.
Cheers,
Joel
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Location:
On your mum!
Registered:
May 2002
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 Re: have i blown a piston/headgasket? - fixed with pics!
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Mon, 21 July 2003 07:54
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Hot glue is tops for head gasket repairs (this could be of interest to 7M owners), you just need to roll and beat an old jam tin to overlap the fire ring where it is broken.
That is a really nice tool set that you have there Joel, but I s'pose that it is a little smelly after you put it to good use on that big clown there 
note to self - do not borrow or use Joel's socket set and any other tools that he may find "orifice able".
P.S Allan - the comp ratio is more like 8.0:1
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Location:
Canberra
Registered:
May 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Mon, 21 July 2003 10:22
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When is the 3S planned to be in and running? what gearbox bellhousing do you use for RWD?
Shame you wont be in the under 1800cc class to whip Jason's ass next dyno day  j/k. I've got a long way to go to catch up! Maybe I should have left that highflowed CT26 on my 4AG & wound up the wick!
Anyone heading to the creek in August?
Phil
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Location:
On your mum!
Registered:
May 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Tue, 22 July 2003 00:34
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Phil,
I hope that I'll be heading for the track in (earnest?)August.
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Location:
Terrigal
Registered:
May 2002
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Re: have i blown a piston/headgasket? - fixed with pics!
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Tue, 22 July 2003 00:55
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Hmm when will the 3S be finished........
I'd like to say 6 months or so but doubtful now.
Still need to purchase :
GT30
JMR Inlet & Exhaust manifold
ARP head studs & rod bolts
Strong clutch
Gasket kit, bearings etc.
Labour includes :
Crank grind, stress relieve, nitride.
Complete balance (rods, pistons, crank, flywheel, etc).
Clean up the head.
Make a sump combo of 2S and 3S parts.
Fabricate water pipes from back of the head.
I'm using a 2S bellhousing, and will run either my current W55, or a W58 if one turns up for the right price.
6 months might be unrealistic!
Cheers,
Joel
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