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Old 07-10-2011, 10:35 AM
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Rick Parker Rick Parker is offline
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Join Date: May 2001
Location: California, Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
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I don't know the entire story but some of the earlier 3 valve engine had some serious issuses with the spark plugs. Seems there were not enough threads and they would pull the threads when removing the plugs, or the thrads would fracture and the spark plugs would get spit out of the heads. Seems there was only 3 or 4 threads securing the plugs. There is a good fix; but the OEM design seemed lacking. The plugs were real pricey too.
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Last edited by Rick Parker; 07-10-2011 at 10:37 AM..
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