Head Problems Need Advice0
07-23-2009, 09:39 PM
#1
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Location: Milford, Delaware
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Head Problems Need Advice0
My car with is running like **** and is blowing lots of white smoke but not all the time. I have a used set of gt-40x heads they are junk nothing but problems. I want to get a set of cast gt-40's i dont want the p's. What is the valve size on the cast gt-40's and what is the difference beside weight compared to the gt-40x
07-23-2009, 10:03 PM
#3
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Location: Massachusetts, New Bedford
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i have the gt40x heads and they work just fine for me.. what kinda problems do you have?
the gt40xs are 1.94 and 1.54
did you get ur heads checked at the machine shop before install? id take them off and bring them to the shop before down grading to the irons.
# Intake flows approximately 240 cfm at .550" lift (at 28" of H20)
# Exhaust flows approximately 170 cfm at .500" lift (at 28" of H20)
the gt40xs are 1.94 and 1.54
did you get ur heads checked at the machine shop before install? id take them off and bring them to the shop before down grading to the irons.
# Intake flows approximately 240 cfm at .550" lift (at 28" of H20)
# Exhaust flows approximately 170 cfm at .500" lift (at 28" of H20)
07-24-2009, 03:02 PM
#4
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they were used and the piston hit so i had them milled down .25 and it has always whistled i tried everything and it just never ran as strong as before and now my car is blowing white smoke and running really bad i just want a rebuilt set of gt-40s
07-24-2009, 03:10 PM
#5
Join Date: Apr 2009
Location: ga
Posts: 20
sounds like a head gasket, but then again they are used aluminum heads! i thought there was a prob putting any gt40s on an 86 cuz of the flat tops w/o valve reliefs, and they are milled? might want to check valve clearance before putting on another set.
07-24-2009, 05:26 PM
#6
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I have a 93 engine and i thought head gaskets i did a pressure test the one you put on the radiator car hole and it held 19 pounds no problem. its weird bout 6 months ago i did water pump timing chain oil pan gasket lower intake alot of stuff after that I was getting smoke from my cats my buddy said it has to burn all the junk out from all the work i did and it was blowing white smoke out the exhaust once in a while it doesnt do it all the time but its running bad now and smokin a little more as long as its not bottom end im good
07-26-2009, 10:41 AM
#10
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yeah well I got the heads off and I had my dad help me put a spark plug in cause it didnt feel right and he didnt have it in all the way it still looked brand new but im selling my gt-40x heads and I am buying a new set of AFR's
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