Importance of correct head gasket on sleeved motor
01-11-2005, 09:45 AM
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Importance of correct head gasket on sleeved motor I had a 408Ci dry sleeved motor that I had purchased a few months back. Had my local tuner install the motor along with a new set of stage III 6.0L heads and he uses FELPRO gaskets.
After the engine warmed up it was leaking oil and water. Once it was allowed to cool, and then re-started no problems. But once it heated up again it was leaking again. My tuner was 100% positive the motor had a cracked sleeve.
Sent the motor back to the engine builder. He magnafluxed the block, no sleeve problems. Did a leak down, no issues. Finally, he installed a set of 6.0L heads with the FELPRO gaskets and pressurized the system. After awhile, the leaks started.
He then installed a set of $30 6.0L GM gaskets and did the test over again. NO LEAKS!!!!!!!!!!!!
It appears that the FELPRO gaskets have a bore size larger than area and they dont make enough contact with the sleeve or cylinder and once under heat and pressure they allow the sleeve or the area around it to leak.
I was wondering if this is ALREADY COMMON KNOWLEDGE or did my local tuner by his LACK OF KNOWLEDGE cost me THOUSANDS of dollars??? I had to pay to have the engine removed from my car, and then shipped to the engine builder. And now have to pay for re-installation of a motor.
Thanks
After the engine warmed up it was leaking oil and water. Once it was allowed to cool, and then re-started no problems. But once it heated up again it was leaking again. My tuner was 100% positive the motor had a cracked sleeve.
Sent the motor back to the engine builder. He magnafluxed the block, no sleeve problems. Did a leak down, no issues. Finally, he installed a set of 6.0L heads with the FELPRO gaskets and pressurized the system. After awhile, the leaks started.
He then installed a set of $30 6.0L GM gaskets and did the test over again. NO LEAKS!!!!!!!!!!!!
It appears that the FELPRO gaskets have a bore size larger than area and they dont make enough contact with the sleeve or cylinder and once under heat and pressure they allow the sleeve or the area around it to leak.
I was wondering if this is ALREADY COMMON KNOWLEDGE or did my local tuner by his LACK OF KNOWLEDGE cost me THOUSANDS of dollars??? I had to pay to have the engine removed from my car, and then shipped to the engine builder. And now have to pay for re-installation of a motor.
Thanks
