Author Topic: Tensioner guide bolt torque (Read 2858 times)

Sir Anthony Regents-park · « **on:** October 12, 2010, 04:40:29 PM »

Evening Folks

I'm doing a timing chain replacement on a 318iS, and this is the first one I've done for a long, long time with the older type arrangement with the little guide sprocket at the bottom near the crank as opposed to the later (post 9/93) curved guide 'slipper'.

From distant memory these could give trouble with the bolt snapping off in the block, sprocket loose and chain coming off - an engine write off, basically.
Now, I can get a new bolt and it would be madness not to fit a new one with the front of the engine off. But I cannot find anywhere the correct torque figure and it's something that needs to be right!
I've had a scan through the factory BMW E36 manual but can't find reference to this bolt - it's a 'fillister head' bolt, i.e an allen bolt.

Can anyone help with this please? I'm off to my local dealer tomorrow, but if anyone knows off the top of their heads it would save aggro. Thanks!

Good site btw.

DesktopDave · « **Reply #1 on:** October 12, 2010, 07:58:25 PM »

Bentley says to always replace the crank bolt. They note it as a vibration damper to crankshaft bolt. Torque to 330Nm, 220lb-ft.

RealOEM lists it for $8.20. Strangely, the washer is also listed for that price. I'd assume you care-use that.

Sir Anthony Regents-park · « **Reply #2 on:** October 13, 2010, 03:51:44 AM »

No, it's a small allen bolt part number 0711 991 9941. It looks like it wants around 20nm tops.

Look at parts 11, 12 and 13 on real oem.

monko141 · « **Reply #3 on:** October 13, 2010, 10:29:28 AM »

e36 Bentley chart shows an 8.8 grade m8 bolt 24Nm

DesktopDave · « **Reply #4 on:** October 13, 2010, 11:06:38 AM »

Ah, my bad. Read your post wrong. Good info just above.

Sir Anthony Regents-park · « **Reply #5 on:** October 13, 2010, 04:27:11 PM »

Quote from: monko141;97415

e36 Bentley chart shows an 8.8 grade m8 bolt 24Nm

Thanks!