I'm CRACKED!!
Thread Starter
Drifting
Joined: Dec 2004
Posts: 1,321
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From: Edgewater (20 miles south of Daytona) Florida
I'm CRACKED!!
Pulled the two pistons (#4 & #8) and found both with cracked ring lands between the top and second rings. # 4 had two areas cracked. NOW I know why I had leakage and blowby, but still don't know about the water loose deal. Looks like the motor is coming out for complete tear down. Damn!
Happy 4th of July! 
Glenn
Happy 4th of July! Glenn
Thread Starter
Drifting
Joined: Dec 2004
Posts: 1,321
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From: Edgewater (20 miles south of Daytona) Florida
Originally Posted by noonie
Blew head gasket first?
Overheated this area second?
Ended up with cracked pistons third?
Have the block ironed. If no cracks?
Overheated this area second?
Ended up with cracked pistons third?
Have the block ironed. If no cracks?
What do you mean "ironed"? you mean check the deck? The plan as of today is to pull the whole motor back out (yet once again...not bad for 200 miles hum?) and do the whole rebuild thing, AGAIN. I don't trust those other 'new' SRP blower pistons now. Wan't to see them all up close. Still don't know which came first, and why it was overheating other than a possible blown headgasket
Glenn
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Race Director
Joined: Sep 1999
Posts: 11,361
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From: Plano TX
One thing to check very carefully is the ring gap. When people first started putting blowers on the (new style) LT-1 this is exactly what happened. The blower put more heat into the cylinders and the rings buttoned up and broke the ring lands. With a blower you need larger gaps.
Melting Slicks
Joined: Jul 2004
Posts: 3,248
Likes: 48
From: westland mi
ouch! really sorry to hear that Glenn, know howhard and the time you've put into "Blue" the last 2 yrs. hopefully this'll be the last hurdle to get over. good luck w/this rebuild. looks like next yrs power tour will meet up
Thread Starter
Drifting
Joined: Dec 2004
Posts: 1,321
Likes: 0
From: Edgewater (20 miles south of Daytona) Florida
Originally Posted by zwede
One thing to check very carefully is the ring gap. When people first started putting blowers on the (new style) LT-1 this is exactly what happened. The blower put more heat into the cylinders and the rings buttoned up and broke the ring lands. With a blower you need larger gaps.
Glenn