That sucks, especially if there was no warning and it was a relatively fresh engine.
I blew a head gasket!!!
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From: Surf City, NC
I blew a head gasket!!! I was pulling out into traffic on Back Beach road and I took 1st up to about 3800 rpms when suddenly the car started kind of misfiring and and sputtering! Then I let off and eased it into second and the same thing started happening up to about 3200 rpms. So I put it back into 4th and cruised home nice and slow for about a mile! I couldn't figure it out why it was doing this so I parked it and let it cool down. I checked the oil and it looked fine. Looked at all my sparkplugs and they were fine. Then later I started it up and took it for a slow roll around the block and it was still doing the same thing! I also noticed that it got up to operating temperature fairly quick too and on the way home the temperature gauge started to round 220 degrees which it never goes above 190 degrees unless it is the middle of the summer and I have the A/C on! So I took it home and checked the oil again it looked like chocolate milk! Damn I knew it right then! I waited until the next day to check the radiator and it was like 1/2 full. I am just dumbfounded as to how this can happen! My motor was built in Sept. 03. I am only running 8 psi. It was tuned properly and has been running great! The last time it was tuned was in January 04 and it made 503rwhp and 495 rwtq and held a solid 12.1 A/F ratio... 
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From: Surf City, NC
Originally Posted by Pro Stock John
You have a fuel pressure gauge, is the pump going away?
Last edited by Packy; Mar 5, 2004 at 10:30 PM.
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From: Bellevue, Wa
part throttle tuning?
alot of people seem to ignore that.
it's easy to tune for the pedal to the floor situations but I know I can see 4-5psi with the pedal only halfway down. If I had not modified when the car goes into WOT mode based on TP I would be running 4-5psi with a 13.1 or leaner A/F in those situations.
Just a wild guess but something to look at. It also could very easily be something was done wrong when the motor was put together.
alot of people seem to ignore that.
it's easy to tune for the pedal to the floor situations but I know I can see 4-5psi with the pedal only halfway down. If I had not modified when the car goes into WOT mode based on TP I would be running 4-5psi with a 13.1 or leaner A/F in those situations.
Just a wild guess but something to look at. It also could very easily be something was done wrong when the motor was put together.
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From: Austin, TX
Here is a theory and something you should check.
Pull off your blower outlet and check for signs of oil.
Basic scenario is as follows:
* High cylinder pressure and low tension rings = Blowby
* Blowby = lots of crankcase pressure
* Crankcase pressure + PCV fresh air source to blower inlet = oily gasses in the intake
* oily gasses in the intake = fuel contamination
* fuel contamination = octane of about 80
* octane of about 80 = detonation
* dotonation = motor turns into a
Pull off your blower outlet and check for signs of oil.
Basic scenario is as follows:
* High cylinder pressure and low tension rings = Blowby
* Blowby = lots of crankcase pressure
* Crankcase pressure + PCV fresh air source to blower inlet = oily gasses in the intake
* oily gasses in the intake = fuel contamination
* fuel contamination = octane of about 80
* octane of about 80 = detonation
* dotonation = motor turns into a
Originally Posted by QuickSilver2002
Here is a theory and something you should check.
Pull off your blower outlet and check for signs of oil.
Basic scenario is as follows:
* High cylinder pressure and low tension rings = Blowby
* Blowby = lots of crankcase pressure
* Crankcase pressure + PCV fresh air source to blower inlet = oily gasses in the intake
* oily gasses in the intake = fuel contamination
* fuel contamination = octane of about 80
* octane of about 80 = detonation
* dotonation = motor turns into a
Pull off your blower outlet and check for signs of oil.
Basic scenario is as follows:
* High cylinder pressure and low tension rings = Blowby
* Blowby = lots of crankcase pressure
* Crankcase pressure + PCV fresh air source to blower inlet = oily gasses in the intake
* oily gasses in the intake = fuel contamination
* fuel contamination = octane of about 80
* octane of about 80 = detonation
* dotonation = motor turns into a
That sounds good but no on a forged bottom end right........... meaning no low tension rings...???
Kyle
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From: Austin, TX
Originally Posted by NA$TY-TA
That sounds good but no on a forged bottom end right........... meaning no low tension rings...???
Kyle
Kyle
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From: Surf City, NC
Originally Posted by MelloYellow
Type of Gasket?
Head Studs or no?
Compression Ratio?
Timing?
Spark Plug type?
Head Studs or no?
Compression Ratio?
Timing?
Spark Plug type?
No, GM stock headbolts might have been used after talking with my builder... We won't know until they open it up I guess.
9.5:1
No clue on the timing, but it was tuned by the builder at his shop and he tunes very well.
NGK TR-6 gapped at .35
Last edited by Packy; Mar 6, 2004 at 06:57 PM.