North American Turbocoupe Organization



88 TC Cylinder Head Question
tbird-88 Offline
Junior Member
#1
Anyone had good results having a cracked head repaired? Otherwise, any suggestions for a replacement head?

I pulled the head off my 88 TC today to replace the head gasket. I found a crack in the head in the #2 cylinder pocket. The crack goes from the exhaust valve seat to past the past edge of the cylinder pocket onto the head sealing surface (perpendicular to length of head).

Ideas/ recommendations?
Gerald
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Jeff K Offline
Administrator
#2
That crack sounds pretty bad, but it's hard to tell if it is repairable without a pic. Might want to take the head to a good automotive machine shop familiar with the 2.3 engine and see if it is repairable.
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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Pete D Offline
Administrator
#3
There are methods to repair the head but with considerations. A machine shop has to know what and how to do it and has the equip. The head must be repairable also. The work is generally not cheap. It may not hold. Actual uncracked Turbo heads are hard to find.

Many people just find an N/A head and go from there. Flow isn't quit as good and the compression ratio is higher, limiting boost. To some extent the combustion chamber can be reworked to lower the compression ratio. Runners can be reworked to give some flow improvements.

There are some early non-turbo heads that have similar shaped combustion chambers to the turbo heads and, I think, better runners. Not sure how hard those are to find. You can find more info on various heads as http://www.merkurencyclopedia.com/Motor/...rhead.html
Pete Dunham


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