Measure the protrusion of the piston above the block when you have the head off. If any oil leaked into the #1 cylinder, it can cause a hydrolock which will bend the connecting rod. Careful of whiplash when you turn the crank by hand. The spring on the vacuum pump causes the chain to lurch forward. You probably want to remove it anyway to inspect the injection pump timer for wear.
-Dave Walton On Thu, Apr 17, 2008 at 9:34 AM, Dillon, Meade M CIV SPAWARSYSCEN Charleston SC J52 <[EMAIL PROTECTED]> wrote: > Greetings Dieselvolk, > > I haven't been on this list for several years, but decided to > re-subscribe recently. Nice to see a few familiar names! > > To the topic: I purchased a used #14 head for OM603 motor for $200, > delivered to machine shop for testing and rebuild. They pressure tested, > it passed, they started to take apart, found two cracks between > pre-chambers and valves, pressure tested again and it still passes. > > Is this head worth rebuild and installation? > > Background: I have an '87 300TD, 307k miles, #14 head which I'm pretty > sure is original. Recently while on a long trip the oil consumption > increased from qt/3000 miles to qt/500 miles, and a lifter tick > developed at front of engine. Replaced the consumed oil, fiddled around > a bit and the tick fixed itself. Drove more gently on the way home (80 > mph vice 95 mph) and oil consumption was normal. > > So, working theory is that I have a failing head gasket at oil passage > by #1 cylinder, which opens up when the engine is run hard and hot but > for most of my driving is OK. No sign of coolant in oil or vice versa > (oil sample sent for testing, waiting for results), no pressurized > radiator hose after sitting overnight. I'm considering pulling the head > to replace the gasket but want to have a good rebuilt head ready to put > on so that downtime is minimized. However, give complete lack of > symptoms after just one episode, I'm not sure I'm going to do that until > I've determined more definitively that I've got a problem with either > head or gasket. > > Very respectfully, > /s/ > LCDR Max Dillon > '87 300TD 307k miles > Charleston SC > > PS: I'm lurking on digest mode, so please CC my email address if you > respond, else it might be a day or two before I see your reply and can > respond... > > _______________________________________ > 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
