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#1
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om617.952 no compression after rebuild.
Crank at tdc. Cam marks line up. Number1 piston up, Valves closed on number 1 cylinder.
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#2
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this
this
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#3
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Where is this picture taken? No compression on all cylinders? We need more info. How did you determine there is no compression, please?
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. ![]() ..I also have a 427 Cobra replica with an aluminum chassis. |
#4
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Compression tester installed in place of injector.
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#5
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Is the valve in the tester any good.
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92 e300d2.5t 01 e320 05 cdi 85 chev c10 |
#6
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#7
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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.
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Current stable: 1995 E320 157K (Nancy) 1983 500SL 125K (SLoL) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) Gone and wanting to forget: 1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz] |
#8
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Ive tried 3 testers. Here is a video on my instagram. https://www.instagram.com/p/BxN2IvzAYkg/esters. Just click on Vonbohde.
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#9
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No compression on all cylinders.
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#10
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You do have the injectors installed? If you do you must have all your valves held open somehow.
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. ![]() ..I also have a 427 Cobra replica with an aluminum chassis. |
#11
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Glow plugs in place?
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. ![]() ..I also have a 427 Cobra replica with an aluminum chassis. |
#12
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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.
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#13
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Did you grind the valves when you rebuilt the engine or just lap them?
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Milan Brown 1979 240D, rebuilt OM617.952 turbo diesel, rebuilt 722.315 transmission - engine spun a rod bearing 1979 300SD, ~90k original miles, all stock |
#14
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I had the machine shop re gring the valve seats. I installed new valves and lapped them in with a fine compound.
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#15
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