Heads are lifting...what are my options?
- Thread starter mike diesel
- Start date
going from standard arp to 625's my block moved .002 but my heads have been fine.
Well I think I am convinced to go the 625 route with new gaskets. See if it holds.
Not that I want to tear it apart again, but it will be interesting to actually see for myself what the Orings did in the aluminum head.
how far outside the bore are people installing these o rings ? and does anyone know if they are using the .041 wire or .062 ?
did they only do your head ? or is that the receiver groove in head ?Not sure on any of it but here is a pic of mine
Little update.
Pulled my heads last Tuesday. Looked like #6 was the culprit. All other looked good. It would built abnormal pressure just normal driving but not spit coolant until I made higher boost.
Cleaned the heads up and checked flatness. They checked out perfect. Reused the ARP 2000 studs, installed new grade C gaskets and torqued to 140ft/lbs. It is working great so far. Can make 85 psi boost with zero abnormal pressure. Its a nice feeling.
Pulled my heads last Tuesday. Looked like #6 was the culprit. All other looked good. It would built abnormal pressure just normal driving but not spit coolant until I made higher boost.
Cleaned the heads up and checked flatness. They checked out perfect. Reused the ARP 2000 studs, installed new grade C gaskets and torqued to 140ft/lbs. It is working great so far. Can make 85 psi boost with zero abnormal pressure. Its a nice feeling.
No orings. I will never do fire rings again after a rather aweful experience with them on my old cummins.
Something interesting I noticed though between the blown gaskets and the new gaskets, looking at this chart shows that the blown gaskets were for an "overbore" engine, which mine is bored .020". New gaskets are for a "non overbore" engine. New gaskets are still larger than the cylinder bore, but still .030" smaller than the overbore gaskets.
I am curious as to if running these overbore gaskets may have contributed to any issues? My theory is that since these new gaskets have a .030" closer diameter to the cylinder bore, they will provide a better clamp/seal. Not sure how much compression ratio would be affected by that... Overall, the truck feels to be more responsive and run better all around after these new gaskets and valve adjustment. I can brake stall my chargers in a hurry. Probably 3 seconds faster than before.
I am curious as to if running these overbore gaskets may have contributed to any issues? My theory is that since these new gaskets have a .030" closer diameter to the cylinder bore, they will provide a better clamp/seal. Not sure how much compression ratio would be affected by that... Overall, the truck feels to be more responsive and run better all around after these new gaskets and valve adjustment. I can brake stall my chargers in a hurry. Probably 3 seconds faster than before.
Mine is half and half, but it's in a sleeve and the head. I'm running graphite head gaskets
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I think all the graphite gasket does is seal water and oil. The fire rings do the rest of the work. Fire rings will hold the boost, but aren't daily driver friendly.