Leakdown on fresh built motor?
Joined: Jul 2014
Posts: 13,864
Likes: 1,561
From: Chesterfield VA
we are only hearing from one side of the problem.
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Thread Starter
Joined: Jun 2003
Posts: 2,140
Likes: 162
From: Johnstown, PA
Update:
I wanted to give all parties a chance to respond before posting an in-depth update.
Evans reviewed the logs and showed that the AFR was 13+ and encountered over 100 counts of knock in a single gear pull during the time of failure. The motor leaned out like crazy, he said he was surprised that this lasted as long as it did. That's what killed the engine.
Why did it go so lean? When the engine was being built, I was told that I would not need a re-tune. (IP assumed the engine was tuned when it was healthy) I followed that guidance. I have since learned that if I had a tune done on a motor that was having blow-by issues, then had that motor rebuilt.. now the new motor is sealing in all that air into the cylinder instead of it blowing by - causing the extreme lean condition.
I'm disappointed in myself for not thinking of such a basic thing. I've been wrenching and modifying my own vehicles for 15 years now and didn't think to myself that this thing should get a re-tune because of the blow-by. Very expensive lesson learned.
So where do we stand? Well, inline pro are doing their best to source a good donor block and are going to waive most/all labor to rebuild this. At minimum I'm looking at new pistons, rings, engine bearings, headgasket and machining the donor block. We're shooting for 2-3 weeks from now to be running again. Inline have been great to work with throughout this and John in particular has been very patient with my million questions about all of this. For anyone in the future that reads this, I would not hesitate to get work done by Inline again.
Anybody have a good donor f20/22 block they want to get rid of? Ha.
Thanks all!
I wanted to give all parties a chance to respond before posting an in-depth update.
Evans reviewed the logs and showed that the AFR was 13+ and encountered over 100 counts of knock in a single gear pull during the time of failure. The motor leaned out like crazy, he said he was surprised that this lasted as long as it did. That's what killed the engine.
Why did it go so lean? When the engine was being built, I was told that I would not need a re-tune. (IP assumed the engine was tuned when it was healthy) I followed that guidance. I have since learned that if I had a tune done on a motor that was having blow-by issues, then had that motor rebuilt.. now the new motor is sealing in all that air into the cylinder instead of it blowing by - causing the extreme lean condition.
I'm disappointed in myself for not thinking of such a basic thing. I've been wrenching and modifying my own vehicles for 15 years now and didn't think to myself that this thing should get a re-tune because of the blow-by. Very expensive lesson learned.
So where do we stand? Well, inline pro are doing their best to source a good donor block and are going to waive most/all labor to rebuild this. At minimum I'm looking at new pistons, rings, engine bearings, headgasket and machining the donor block. We're shooting for 2-3 weeks from now to be running again. Inline have been great to work with throughout this and John in particular has been very patient with my million questions about all of this. For anyone in the future that reads this, I would not hesitate to get work done by Inline again.
Anybody have a good donor f20/22 block they want to get rid of? Ha.
Thanks all!
got that fresh one still?
Joined: Sep 2014
Posts: 11,396
Likes: 1,798
Update:
I wanted to give all parties a chance to respond before posting an in-depth update.
Evans reviewed the logs and showed that the AFR was 13+ and encountered over 100 counts of knock in a single gear pull during the time of failure. The motor leaned out like crazy, he said he was surprised that this lasted as long as it did. That's what killed the engine.
Why did it go so lean? When the engine was being built, I was told that I would not need a re-tune. (IP assumed the engine was tuned when it was healthy) I followed that guidance. I have since learned that if I had a tune done on a motor that was having blow-by issues, then had that motor rebuilt.. now the new motor is sealing in all that air into the cylinder instead of it blowing by - causing the extreme lean condition.
I'm disappointed in myself for not thinking of such a basic thing. I've been wrenching and modifying my own vehicles for 15 years now and didn't think to myself that this thing should get a re-tune because of the blow-by. Very expensive lesson learned.
So where do we stand? Well, inline pro are doing their best to source a good donor block and are going to waive most/all labor to rebuild this. At minimum I'm looking at new pistons, rings, engine bearings, headgasket and machining the donor block. We're shooting for 2-3 weeks from now to be running again. Inline have been great to work with throughout this and John in particular has been very patient with my million questions about all of this. For anyone in the future that reads this, I would not hesitate to get work done by Inline again.
Anybody have a good donor f20/22 block they want to get rid of? Ha.
Thanks all!
I wanted to give all parties a chance to respond before posting an in-depth update.
Evans reviewed the logs and showed that the AFR was 13+ and encountered over 100 counts of knock in a single gear pull during the time of failure. The motor leaned out like crazy, he said he was surprised that this lasted as long as it did. That's what killed the engine.
Why did it go so lean? When the engine was being built, I was told that I would not need a re-tune. (IP assumed the engine was tuned when it was healthy) I followed that guidance. I have since learned that if I had a tune done on a motor that was having blow-by issues, then had that motor rebuilt.. now the new motor is sealing in all that air into the cylinder instead of it blowing by - causing the extreme lean condition.
I'm disappointed in myself for not thinking of such a basic thing. I've been wrenching and modifying my own vehicles for 15 years now and didn't think to myself that this thing should get a re-tune because of the blow-by. Very expensive lesson learned.
So where do we stand? Well, inline pro are doing their best to source a good donor block and are going to waive most/all labor to rebuild this. At minimum I'm looking at new pistons, rings, engine bearings, headgasket and machining the donor block. We're shooting for 2-3 weeks from now to be running again. Inline have been great to work with throughout this and John in particular has been very patient with my million questions about all of this. For anyone in the future that reads this, I would not hesitate to get work done by Inline again.
Anybody have a good donor f20/22 block they want to get rid of? Ha.
Thanks all!
Think a complete , hopefully working, used engine maybe the way to go. Not sure about that supercharging, though...
Thread Starter
Joined: Jun 2003
Posts: 2,140
Likes: 162
From: Johnstown, PA
Heh... I feel the same way about supercharging at this point.. but, I'm so deep in this car now, it will be supercharged and running well if it kills me! haha
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