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Old 08-11-2024   #31
bob@tradeshowconsulting.c
 
Join Date: May 2022
Location: Georgia
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Default Re: Engine noise- stuck lifter?

Been following, interested in several pics of the chain Gude since you have the cover off.. and if it firmly in place...what was the loose piece you originally showed ? what condition was the plastic on the guide and will you replace ?

Last edited by bob@tradeshowconsulting.c; 08-11-2024 at 11:17 AM.
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Old 08-11-2024   #32
Tim555
 
Join Date: Mar 2024
Location: Northeast
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Default Re: Engine noise- stuck lifter?

Quote:
Originally Posted by bob@tradeshowconsulting.c View Post
Been following, interested in several pics of the chain Gude since you have the cover off.. and if it firmly in place...what was the loose piece you originally showed ? what condition was the plastic on the guide and will you replace ?
It was firmly in place. The loose piece was the chain guide that is attached to the top of the cam cover. The plastic seemed fine and didnt have much wear. I don?t plan on replacing it. I?ll take some pics and videos of it when I?m home in a few days.
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Old 08-14-2024   #33
Tim555
 
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Default Re: Engine noise- stuck lifter?

I got the other side off by drilling out the two stuck bolts. I was then able to free them up with heat once the cover was off. What a pain in the ***. I did not find anything obvious that would be the cause of any noise or metal in the oil. Is it safe to pull the fuses for the fuel pumps and injectors and crank the engine over? Spark plug wires are also removed and plugs loosened.
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Old 08-14-2024   #34
bob@tradeshowconsulting.c
 
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Default Re: Engine noise- stuck lifter?

Tim,

I have removed the fuel pump fuses many times without a problem,
sometimes after a month or more of storage , I pull them to crank the engine to build oil pressure .. before starting
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Old 08-15-2024   #35
Tim555
 
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Default Re: Engine noise- stuck lifter?

Here are some videos of the noise with the cam cover removed.

https://youtube.com/shorts/QLG1ntYRF...3_FwigdtHKd5Hz

https://youtube.com/shorts/FWlOfSDEs...wdCUexmoP6U_Cw
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Old 08-16-2024   #36
Jagdpanzer
 
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Default Re: Engine noise- stuck lifter?

A word of caution.
The camshaft retainers that are installed under the cam covers are meant to hold the cams in place to facilitate the installation of the camshaft cover. They are a very loose fit on the camshaft. The smaller ones are not that strong and have been known to break if used by themselves to hold down the camshafts while rotating the engine. This is purpose for installing the 16 temporary camshaft retainers found in the Kent-Moore LT5 service tool kit.
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Old 08-17-2024   #37
A26B
 
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Default Re: Engine noise- stuck lifter?

Camshaft Retainer Set also found here.
Can be rented or purchased outright. See ful description for details.

https://www.jerrysgaskets.com/tool-s...m-timing-14b2/

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JERRYS LT5 GASKETS & PARTS
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1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc.
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Old 08-17-2024   #38
A26B
 
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Default Re: Engine noise- stuck lifter?

Quote:
Originally Posted by Tim555 View Post
It was firmly in place. The loose piece was the chain guide that is attached to the top of the cam cover. The plastic seemed fine and didnt have much wear. I don?t plan on replacing it. I?ll take some pics and videos of it when I?m home in a few days.
If I understand you correctly, the steel guide was loose from the Cam Cover?

If so, I suggest you remove both screws, clean the screws & the tapped holes with brake cleaner & blow dry before reinstalling with Loctite 262 (red high strength) You absolutely do not want it to come completely loose & get caught up in the timing chains. It has happened before.

Otherwise, I understand the plastic facing was firmly attached to the steel guide. Correct?
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JERRYS LT5 GASKETS & PARTS
http://www.jerrysgaskets.com
1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc.
2016 Black-Red, 3LT-Z51 Auto 8-speed.
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Old 08-20-2024   #39
Tim555
 
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Default Re: Engine noise- stuck lifter?

Quote:
Originally Posted by A26B View Post
If I understand you correctly, the steel guide was loose from the Cam Cover?

If so, I suggest you remove both screws, clean the screws & the tapped holes with brake cleaner & blow dry before reinstalling with Loctite 262 (red high strength) You absolutely do not want it to come completely loose & get caught up in the timing chains. It has happened before.

Otherwise, I understand the plastic facing was firmly attached to the steel guide. Correct?
It could be moved slightly, side to side, but I can?t get it off with just my fingers.

I did take a look at the timing chains and noticed something very strange. On the passenger side there were all these scrape marks on the side of the head. It was hard to get a picture of, but I attached a few that turned out ok. Is it possible for the chain to move this much with a bad tensioner and cause that? That would explain the metal in the oil and the elevated aluminum and iron that the used oil analysis showed. That cam cover did have 9/14 written under it in sharpie while the other side was blank, so maybe it?s old damage that was repaired?
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Old 08-20-2024   #40
Tim555
 
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Default Re: Engine noise- stuck lifter?

Pics didn?t attach. I?ll try again
Attached Images
File Type: jpg IMG_0595.jpg (127.6 KB, 32 views)
File Type: jpg IMG_0593.jpg (124.7 KB, 26 views)
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