North American Turbocoupe Organization



head gasket...
Scott Smith Offline
Junior Member
#1
how do I know if I need a new head gasket?
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Pete D Offline
Administrator
#2
Headgaskets can blow in different ways and have different symptoms. Sometimes just 1 cylinder will be low on compression. Sometimes it will blow between two cylinders and both will be low on compression. Somtimes
it will blow so that oil get in the coolant or sometimes it will be coolant in the oil. Sometimes oil will leak down the outside of the head. Sometimes coolant will leak and be burned, white smoke out the pipe.

That being said, what problem are you having?

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NATO Member. it's not a vice, it's an obsession
Good judgement comes from bad experience, and a lot of that comes from bad judgment.
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Pete Dunham


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Scott Smith Offline
Junior Member
#3
Well, I noticed a little sputtering and vibration at highway speed (70-75mph) when I hit the gas, but only up to @ 5 psi, after that it runs fine. No white smoke. Maybe its the plug wires. I also found that the BCS is bypassed. There is no boost valve on this car, will the BCS valve being bypassed negatively affect performance?


[This message has been edited by Scott Smith (edited 03-03-2003).]

[This message has been edited by Scott Smith (edited 03-03-2003).]
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Jeff K Offline
Administrator
#4
Doesnt sound like a HG problem to me. Just do a complete tune up with Motorcraft parts, and see how it runs.

What max boost are you getting? With the BCS bypassed (the 2 hoses just hooked together), you should probably be getting 17 to 18 psi boost by 2800 to 3200 RPM at WOT in all gears, which is a GOOD thing!!

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 20 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 00 Windstar (wifes vehicle)
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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Scott Smith Offline
Junior Member
#5
I do get great boost Right around 3000rpm in every gear to 15psi but it stops dead at 15psi, it goes no higher. I still need the Gillis boost valve. I'll do a complete tune-up and if I have/dont have more problems, Ill let yall know. Thanks for the help.
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