To corraborate Mitch's excellent suggestions - all the hard to start issues i've had with 615, 616, and 617 engines have been related to one of the following: air in a fuel line, bad glow plugs, or too tight valves (other than too cold with the wrong oil).
On Sun, Sep 13, 2009 at 3:41 PM, Mitch Haley <m...@voyager.net> wrote: > > Ether isn't good. Ether in a glow plug engine is very bad. > In order to start, you need fuel, compression, and heat. > > Let's start with heat. The simplest thing to do is to glow for 30 seconds > instead of cranking as soon as the light goes out. > > You can unplug the glow plug harness from the glow plug relay, and jumper > the pins in the connector on the plug harness to test the plugs > individually. You can do this crudely with an ohmmeter, or better yet, jump > an ammeter between the positive battery terminal and a wire to a glow plug. > The plug should draw around 20A initially and then taper down to about 10A > after a few seconds. If you do that with all five, you'll see which one(s) > don't act right. > > If the plugs are all good, plug the connector back into the relay, turn the > key on, and check for voltage at a glow plug. > > Compression: one thing commonly overlooked is valve adjustment. If your > valves are tight, it's not going to want to start when cold. While you've > got the valve cover off, slowly turn the engine until the timing marks line > up on the front cam tower and read the crank position on the crank damper. > If the crank is five degrees ahead of the cam, you need a new cam chain. > > If the above check out OK, post a follow-up and we'll get into fuel issues, > starting with the hand primer pump. > > Mitch. > > > > -- > OK Don > Pair of W124 300D 2.5 Turbos > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20090913/3ea9434a/attachment.html> _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
