I don't have the know-how, but I wish someone smarter than me would tell him how to hook up an external oil pressure gauge.
On Mon, May 18, 2009 at 3:02 PM, Dan Weeks <theprofil...@dwx.com> wrote: > '82 300SD 314k daily driver. Runs great. Lately, I'd been noticing oil > pressure seemed a bit low at idle, but my idle's set too low, so I didn't > think much of it. Today, I notice a half-bar at idle. Slipped it into > Neutral, and it came up to a bar. Next short trip, same day, OP fine until > car warmed up, then it went down to barely off the peg at idle. Turned > around to come home, and OP gradually tailed off to nothing. Stopped the > car. Checked oil level, which was fine. Oil seemed a bit thin, but not > watery by any means, and the engine was hot. Looked like plenty of oil > sitting on the cam when I took the OP filler cap off to check. Started up > again, and had between 2 and 3 bar at 2k rpm. Had just a few blocks to go, > so drove it back. Needle was quite erratic--would go up to the top peg, then > fall down to 0. WHen revved up it would suddenly jump up--most of the time. > Sometimes it wouldn't move at all. Got home, with no other signs of low > OP--engine ran fine, no unusual noises, no blue smoke. > > What gives? How can I test the gauge/sensor? Is there any way I can > temporarily wire in an aux OP gauge to check? If so, how. I have a somewhat > jumpy temp gauge and fuel gauge, and the tach is inop most of the time, so > I'm hoping it's just electrical. Is there a pattern/failure mode for 617 oil > pumps? Could something be intermittantly plugging the pickup tube screen? > I'm trying to think of everything I can here. Car is parked until I figure > this one out. Any advice/test procedures appreciated. > > Thanks in advance! > > Dan > > > > _______________________________________ > 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 > -- The only absolute is that everything is relative. --Henri de Saint Simon -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20090518/8d1d2db9/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
