Hi, yes starting hot is not that great. Strange that it doesn ot use oil ( my two 617's used a lot of oil before compression dropped to low levels) and the fact that the pressures are even all round. PEter
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 13 November 2007 02:52 To: mercedes@okiebenz.com Subject: Re: [MBZ] Will 617 and 603 operate at compression of 15 bar In a message dated 11/12/2007 2:22:28 A.M. US Mountain Standard Time, [EMAIL PROTECTED] writes: Did compression test on my 124 and I getting an even 15 bar all round. Had the gauge itself ( without non-return valve ) tested and it actually was slightly overreading ! The question is will these engine start and run well with such a low compression. Oil consumption is close to zero. Peter, I think you have answered your own question, the 603, with 6 cylinders, will start with good reliability, even though it is somewhat below the factory recommendation for overhaul. The 603, with fast acting glow plugs, would put less of a drain on the battery, and good cranking speed can be obtained, a critical factor in good starting. Curiously, I have found that one of the first clues that the MB diesel engine is nearing the overhaul point, is that it won't start at normal operating temperature without glowing. This was true of my 200D (66 with 243,000 miles on the odometer) my 240D (74 @110,000 miles,with bad rings due to the PO loaning it to some guy who drove it up a mountain without water) and my current diesel (79 300SD with 234,000 miles). The 79 had zero compression in one cylinder, the other four were about 240PSI, A broken ring ate the top land of the piston, but it would still start and run to the speed mark in top gear Two batteries in series were used towards the very end. The mileages quoted are when I overhauled the engines. Just my $0.02 Jim Friesen Phoenix AZ 79 300SD, 264 K miles 98 ML 320, 152 K miles ************************************** See what's new at http://www.aol.com _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
