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#1
02-07-2016, 12:47 PM
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OM 603 960 PISTON RINGS
Hi to everibody
I am doing head gasket and re seal my engine and after looking my cylinders I am thinkîng to change piston rings. I founded 3 kits of the same company for bore 87mm My pistons are stamped ''x'' here codes 08-183300 00 08-183200 00 08-743607 00 all are composed by 3 rings with same dimension 2mm 2.5mm and 3 mm Do you have any suggestions? Any experience ? I will do honing but i would like to install best rings to have good compression Thanks a lot Alberto 
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#2
02-07-2016, 01:21 PM
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Can you see old honing marks in the piston bores?
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#4
02-08-2016, 01:57 AM
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A good indication generally if these old engines have not been rebuilt before. If you decide to ring it have the pistons checked for size. They apparently wear in these engines. If you were not burning oil and had good compression I might not do the rings.
Depending on your area and cost and availability. Picking up a complete used engine in good condition might be better overall if you are really going into the engine and seem to need rings.
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#5
02-08-2016, 10:47 AM
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The wear in the Piston ring grooves needs to be checked and the out of round of the Cylinders. There should be a spec in the Manual for how much out of round is acceptable.
__________________
84 300D, 82 Volvo 244Gl Diesel Last edited by Diesel911; 02-08-2016 at 11:33 PM.
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#6
02-08-2016, 10:46 PM
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The ~200K mile 603.960 block that went into my '93 SD had main and rod bearings that Plastigage'd within installation specs so I didn't replace them. I don't replace things that don't need replacing but I'm always waiting for a reason to revisit
 Sixto 83 300SD
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#7
02-09-2016, 12:19 PM
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Same with my engine at 249k, and with all crosshatching still in the bores and ring end gap good, the cylinders didn't get machining either. Love that Mobil 1!
__________________
 Gone to the dark side - Jeff
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#9
02-11-2016, 02:47 AM
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Check out Deves rings if needed. . Deves.com. I used them in my rebuild back in '03. Pistons and cylinders were within limits so had cylinders professional honed and broke in on mineral oil for 5000 miles. Back to Mobil 1 turbo diesel oil with no issues (oil burn) for 13 years. Mileage is unknown since speedo has been changed a few times but it is my daily driver.
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