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12-30-2011
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#1 |
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Join Date: Oct 2011
Location: STAFFORD VA,
Posts: 576
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Boroscoping before finishing????
Hello All as you know I have been working on the Z for a while and I have finally recieved my new Injectors from FIC,..(Jerry I need to order another seal kit!)..Anyway I had a high RPM knock at startup that everyone on here is sure its a dual mass flywheel issue ect due to sureley bad injectors!!!,...Well..I am wondering if I can boroscope the psitons through the sparkplug holes to verify that there is not a head issue(valves slapping the pistons).....
AND....if it is in fact a head issue can I change the head in the car??? Also All my WAZOO buddies...I almost have everything to get this thing done...let me know if we can set up a time or day????? Last edited by oricale; 12-30-2011 at 09:36 AM. |
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12-30-2011
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#2 |
 
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: Boroscoping before finishing????
Retiming the cams, etc would be a PITA....a motor can be pulled in about 4 hours, why not pulled it and address it and any other items....
Just a note, not sure how bad the sound is but the LT-5 has a known piston slap issue that was determined to not impact longevity of the engine or performance..... If the pistons are hitting pistons, why not do a leakdown or compression test to see if there is an issue?
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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12-30-2011
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#3 |
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Join Date: Oct 2011
Location: STAFFORD VA,
Posts: 576
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Re: Boroscoping before finishing????
Here is the earlier thread....http://www.zr1.net/forum/showthread.php?t=15800
I may want to do another compression check,..would that eliminate possible valve issues? |
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12-30-2011
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#4 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: Boroscoping before finishing????
If the valves are hitting they are bent and therefore compression would be down....leakdown would be better.....
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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12-30-2011
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#5 |
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Join Date: Oct 2011
Location: STAFFORD VA,
Posts: 576
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Re: Boroscoping before finishing????
what do i need and can i do it in my garage?
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12-30-2011
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#6 |
 Join Date: Feb 2011
Location: San Marcos CA
Posts: 1,786
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Re: Boroscoping before finishing????
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ON EDIT- Nevermind- just read your previous postings. I would pull the engine if you can positively diagnose it. Last edited by mike100; 12-30-2011 at 01:23 PM. |
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12-30-2011
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#7 | |
 
Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,667
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Re: Boroscoping before finishing????
Quote:
If compression and leak down check good you don't need a boroscope or change the head. You need to give more info, what you've done and checked already. You check injectors,wires/plugs,coils? Check engine light on? Is it only do it at start up? I would suggest take it to a pro and stop wasting time & money,guessing. Pete
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'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage Last edited by Pete; 12-30-2011 at 01:34 PM. |
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