My 300D shut down when the oil preasure dropped. I thought it was designed that way. Did I think wrong?

Yes. The engine shutting down from low oil pressure is a very BAD thing, that means it seized from lack of lubrication.

No it did not seize. It started up but I shut it back off when there was no oil pressure. It spins OK by hand. I thought it might shut down when the pressure drops as a safety measure. I have other cars that are supposed to do that.

In the light of day, I have a better idea of what i am lookng at. The pressure pulled one of the studs that stick out of the filter canister completely out. Threads and all. Looking down into the hole, I can slide the bolt through to the bottom without it threading at all. I will try the helicore thing to do it right, but I wounder if I could just put a nut on the other end of the bolt, and stick it back through the hole from the bottom. Nnd no, when I lost oil pressure, I shut it down there was no safety measure. I am thinking warning alarm/light thread is a good idea after all.

__________________
1979 300SD

Putting a bolt up thru the hole sounds like a better fix than a helicoil to me.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

That means you call 1-800-Metric Motors and bend over.

__________________
2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

That happened to me, but I did not start it up after the threads stripped out.

I DEVCON'd a stud in until I could find and install a filter housing in good shape. Changing the housing was no joy, but I wouldn't trust the DEVCON forever.

__________________
Thank You!
Fred
2009 ML350
2004 SL600
2004 SL500
1996 SL600
2002 SLK32
2005 CLK320 cabrio
2003 ML350
1997 C280 Sport

happened to me at a jiffy lube, i ended up just putting in a nut and bolt all the way through where the stud would normally sit, worked just fine. I shut down the just as the oil pressure dropped.

__________________
1984 Euro 300SDC, (4spd standard)
1986 Toyota Landcruiser Diesel HJ60 5spd X2

Gone but not forgotten (some sold, some stripped)
1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D

Just because there is a torque spec for something doesnt mean you need to follow it. If it is something critical then yes other wise tight but not to tight will suffice.

__________________
1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)

Mechanic said everything checked out, and he emphasized what a tank these cars are. He even replaced the bolt I had ground down with a nice shiny new carriage bolt with the same size nut as the original and a little JB weld, so you would never know the difference. I attached a couple pics of the temporary fix I had fabricated just in case any one should ever find themselves in this mess. Oh yeah, I hear everyone on the tightening by feel. I dont think 20 NM of torque is anywhere close to overtightening, but on a 30 year old car, who knows. From here on out I will ditch the torque wrench and go with the more... "esoteric" approach to tightening bolts! Thanks all.

Attached Thumbnails

     

__________________
1979 300SD