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-   -   om617.952 no compression after rebuild. (http://www.peachparts.com/shopforum/diesel-discussion/398966-om617-952-no-compression-after-rebuild.html)

Roverswap 05-08-2019 05:33 PM

om617.952 no compression after rebuild.
 
1 Attachment(s)
Crank at tdc. Cam marks line up. Number1 piston up, Valves closed on number 1 cylinder.

Roverswap 05-08-2019 05:34 PM

this
 
1 Attachment(s)
this

t walgamuth 05-08-2019 05:37 PM

Quote:

Originally Posted by Roverswap (Post 3918145)
Crank at tdc. Cam marks line up. Number1 piston up, Valves closed on number 1 cylinder.

Where is this picture taken? No compression on all cylinders? We need more info. How did you determine there is no compression, please?

Roverswap 05-08-2019 05:45 PM

Compression tester installed in place of injector.

Roverswap 05-08-2019 05:46 PM

https://www.instagram.com/p/BxN2IvzAYkg/

Diseasel300 05-08-2019 05:52 PM

Does the engine sound like it's pulling against compression or feel like it if you pole it over manually? Maybe your compression tester is junk.

Roverswap 05-08-2019 05:55 PM

Ive tried 3 testers. Here is a video on my instagram. https://www.instagram.com/p/BxN2IvzAYkg/esters. Just click on Vonbohde.

Roverswap 05-08-2019 06:19 PM

No compression on all cylinders.

t walgamuth 05-08-2019 06:58 PM

You do have the injectors installed? If you do you must have all your valves held open somehow.

dieselbenz1 05-08-2019 07:22 PM

Quote:

Originally Posted by Roverswap (Post 3918153)
Compression tester installed in place of injector.

Is the valve in the tester any good.

t walgamuth 05-08-2019 07:31 PM

Glow plugs in place?

Roverswap 05-08-2019 07:45 PM

I have the injectors out except for the cylinder i am testing. I am testing with glow plug installed. I guess I should do a leak down to see if the valves are leaking. I adjusted them but, perhaps I'm off. I would think I would get some needle movement. This engine is bolted to an ax15 manual transmission. The adaptor plate used a Jeep cherokee starter. It may be spinning over slower with this starter.

Maximan1 05-08-2019 08:30 PM

Did you grind the valves when you rebuilt the engine or just lap them?

Roverswap 05-08-2019 09:04 PM

I had the machine shop re gring the valve seats. I installed new valves and lapped them in with a fine compound.

Garagefull 05-08-2019 09:09 PM

1 Attachment(s)
Attachment 152344


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