Engine oil temperature

[yaofeng]

Many of you likely know the notorious V8 engine oil pump bolt coming loose syndrome. I got an V8 motor (Nikasil) at 66 k miles for my 540. The engine is very clean. The valve trains and the sump are spotless.

http://i21.photobucket.com/albums/b274/yaofengchen/BMW_95_540/DSC_2643.jpgNikasil block number 1 725 963

http://i21.photobucket.com/albums/b274/yaofengchen/BMW_95_540/DSC_2623.jpg

http://i21.photobucket.com/albums/b274/yaofengchen/BMW_95_540/DSC_2667.jpg

I want to go over the oil pump bolts before sealing the sump. Naturally the best way is to remove the pump, which I did.

http://i21.photobucket.com/albums/b274/yaofengchen/BMW_95_540/DSC_2669.jpg

There are 11 M6 bolts, 3 M10's and one nut for the oil pump sprocket. My question is what temperature is the engine oil at running condition? I used Loctite 272 which is good for 450 deg F. But I ran out of it applying it to the 11 M6 bolts. I am left with Loctite 290 which is supposedly stronger but only good for 300 deg F.

I couldn't get Loctite 272 at Pepboys or Autozone, only 290.

[632 Regal]

should be good as long as you torque it to spec and clean the holes with brake cleaner. were any of the bolts loose?

[yaofeng]

Yes. I forgot to mention. At 66k miles, the 11 M6's are about 1 ft-lb. The three M10's are about 5 ft-lbs. These are just by my feel. The lone oil pump sprocket nut is very tight though.

I am sure the'll end up in the pan in no time like my existing engine at 144k miles if I do not loctite them.

http://i21.photobucket.com/albums/b274/yaofengchen/BMW_95_540/DSC_2528.jpg

[632 Regal]

from the picture it looks like a good time to change to synthetid oil...looks black nasty unless it wasnt ever changed.

[yaofeng]

The old engine is history. Low and uneven compressions. The new one is of course spotless. But I will do compression before putting it in.

[632 Regal]

before throwing the old one away theres plenty of reasons for uneven compression even with a good engine.

[yaofeng]

Making the old engine work will be another project I have not attempted to define. It may or may not be feasible. Does casting number 1 725 963 sound familiar? Anyway, the current project is to get the 540 up and running. If the compression numbers are good I may consider 6 speed conversion.

[Jon K]

Smash a couple of the threads on the oil pump nut or simply put a weld there to hold it on. That's what I intend to do.

[shogun]

http://people.freenet.de/rod/temp/E32_Oelpumpe/rechts.jpg
http://people.freenet.de/rod/temp/E32_Oelpumpe/links.jpg
http://people.freenet.de/rod/temp/E32_Oelpumpe/hinten.jpg

[yaofeng]

Smash a couple of the threads on the oil pump nut or simply put a weld there to hold it on. That's what I intend to do.

The three bolts at the base of the oil pump are M8's, not M10. I loctited them with Loctite 290 since I ran out of Loctite 272. Tightened them to 19 ft-lbs. I also killed the nut on the sprocket with a punch.

http://i21.photobucket.com/albums/b274/yaofengchen/BMW_95_540/DSC_2678.jpg