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Old 09-08-2017   #21
Jagdpanzer
 
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Default Re: So I had a bit of blowby...

Dom,
How did the cylinder wall look?


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Old 09-08-2017   #22
XfireZ51
 
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Default Re: So I had a bit of blowby...

Quote:
Originally Posted by WARP TEN View Post
Did the little pieces of the ring stay in the groove or did you have to go fishing in the oil for them?--Bob
Bob,

Fortunately, the ring pieces all stayed within the ring groove. No damage was done to the cylinder bore. U can still see the xhatch pattern on the Nikasil.
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Old 09-08-2017   #23
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Default Re: So I had a bit of blowby...

I was skeered to ask how the Sleeve looked and if all the pieces stayed on the piston

All I can say is "good for you"
The Piston Groove may need a bit of inspection also
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Old 09-12-2017   #24
XfireZ51
 
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Default Re: So I had a bit of blowby...

Latest Update. Cylinder heads are on w cam covers now bolted in and cams timed. So motor is about ready to get dropped back into engine bay. Attached are pics of busted motor mount on drivers side. I suspect its been either like this or in some degree of damage for sometime. My driver's side exhaust would twist and I have had now 2 mufflers w metal fatigue in the area of the hanger.
Hopefully, this will remedy the situation.
Briefly what appears to have happened is that metal retainer which limits the amount of movement of the mount, basically spread out and so no longer limited the travel of thentop of the mount. And due to that, the mount essentially was ripped in half and failed along a horizontal line around the circumference of the mount.
BTW, the replacement is the same part# as the LT1/LT4 mount.
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Old 09-13-2017   #25
ssrszz4
 
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Default Re: So I had a bit of blowby...

Kind of like a loose cannon!!

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Old 09-13-2017   #26
XfireZ51
 
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Default Re: So I had a bit of blowby...

Dr. Greekenstein sent a pic of his latest implant. He also sent me comparison that shows the quality of his work. We have PRE and POST valve job leakdown numbers. This is part of Pete's "quality control". Significant improvement in 4 of the 8 cylinders.

B/A

1. 6-5%
3. 10-4
5. 8-4
7. 5-5* This is the cylinder w broken compression ring

2. 8-4%
4. 20-3
6. 12-4
8. 2-2
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Old 09-14-2017   #27
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Default Re: So I had a bit of blowby...

Wth was wrong with cyl #4? That's a terrible before number?


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Old 09-14-2017   #28
XfireZ51
 
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Default Re: So I had a bit of blowby...

Quote:
Originally Posted by tpepmeie View Post
Wth was wrong with cyl #4? That's a terrible before number?


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That would be a question for Dr. Pete. Interesting that u have adjacent cylinders
w the worse #s.
Interestingly, the same can be said for the driver's side bank as well, albeit not to the extent of the passenger side.
I would also say that these were heads I had purchased from a previous LT5
enthusiast. These heads were ported and massaged by GVD sometime in the late 90's or early 2000. So the porting job had been done on the basis that they
knew about then rather than the current state of porting.
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Old 09-15-2017   #29
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Default Well Its ALIVE

Went to Dr. Greekenstein's lab this afternoon, and the motor etc was all buttoned up. Some minor details to attend to but powertrain and drivetrain is ready to go. So we started it up. I'll be checking the tune right away to see if any of the mods have shifted the fueling requirements.
Pretty certain there will be some changes but it should be a matter of tweaking to optimize.

It sounds healthy.

https://youtu.be/3HZhzi-uoSw
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Old 09-15-2017   #30
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Default Re: So I had a bit of blowby...

Nice.. I'm jealous you have both Pete and Al so near by. It will have to be on the job training for me at some point.
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