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#1
06-21-2018, 09:28 AM
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Interesting leak down test vid
Leak down https://www.youtube.com/watch?v=_3wNGGs5fXM
Compression https://www.youtube.com/watch?v=oVsSN7H_eBk and here's his channel. https://www.youtube.com/watch?v=_3wNGGs5fXM
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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do. 
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#2
06-22-2018, 11:51 PM
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Would sure love to use a protractor that fits inside an om603 crank pulley. Would make doing a leak down test a lot easier on a diesel.
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#4
06-23-2018, 11:02 AM
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It doesn't need to be that difficult, they are finding exact TDC to check injector pump timing. A chalk mark is enough when doing a leak down.
This leak down test is what I've been pushing when diagnosing a combustion to coolant leak or a cylinder with low compression.
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#5
06-23-2018, 11:48 AM
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Make a template out of cardboard and protractor and tape it on, with a hole in the middle for the 27 mm socket. I made a permanent one out of a sheet of tin and magnets. Let's see if this photobucket link works.
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85 300D turbo pristine w 157k when purchased 167,870 July 2025 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked Last edited by funola; 06-23-2018 at 01:16 PM.
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#6
06-23-2018, 04:35 PM
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So,
360/5=72* for a 617 every 60* for 6 cylinder and 90* for 4 cylinder? Would accessing through injector hole or glow plug be preferable when you have no particular reason to remove the GP or Injector except to perform the test? Does removing the hard lines (617) automatically cut the fuel leaving the injection pump or would fuel end up all over the engine bay?
__________________
85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.
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#7
06-23-2018, 10:35 PM
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How common is it to have cylinder leakage coming from the crankcase in an OM603? If the bottom end is leaking then things can get expensive and i'll be better off hunting for a used short block.
I'm hoping the leakage is from the air intake and exhaust valves from the head, then I can get the head rebuilt and be fine.
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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily 1992 Mercedes 300D 2.5 202,000 - Pure junk 2000 Mercedes E320 Black - 136,000 miles - Needs repair Don't forget to grease the screw and threads on the spring compressor.
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