Author Topic: Can I use old head bolts after removing (Read 3902 times)

laernu · « **on:** July 22, 2009, 05:54:28 PM »

91 BMW 318is

I wanted to know if i could use my old head bolts after removing the bolts.. If not where can i get the Head Bolts. And also what do i have to torque it to? I need these by friday cause i get my head back from the shop so i can put it back together lol

Please and Thanks
-Mike

romeomike · « **Reply #1 on:** July 22, 2009, 06:45:18 PM »

You'll need new ones, part number is 11-12-1-721-939, pelicanparts.com (El Segundo, CA) has a set of 10 for 12.25 + shipping.

You may find other online vendors closer to where you live.

laernu · « **Reply #2 on:** July 22, 2009, 06:55:58 PM »

do you know how much i have to torque them down to?

romeomike · « **Reply #3 on:** July 22, 2009, 09:48:11 PM »

24 ft-lbs, then one-quarter turn, then a final quarter-turn. Torque order and specifications from the Chilton repair manual:

*7-5-1-3-9
10-4-2-6-8 ----> Front of engine

laernu · « **Reply #4 on:** July 22, 2009, 11:04:47 PM »

sorry but im kind of confused when you mean turn it another quarter turn you mean while on 24ft/lb?

papercutout · « **Reply #5 on:** July 24, 2009, 02:03:21 AM »

No, with a big bar, turn them all 90 degree's after doing the 24ft-lbs, then do them another 90 degree's. Its just a funny BMW technique of torquing down in stages. Can't remember Nm off the top of my head though.

1991 E30 M42 · « **Reply #6 on:** July 24, 2009, 03:05:25 AM »

That's not just BMW, that's just about everything that doesn't have studs.

P. Kennedy · « **Reply #7 on:** August 14, 2009, 03:32:37 PM »

^ True. In the Bentley manuals, they even have pictures and references to a protractor type thingy that you lay under your wrench to ensure the 90 degree increments. Not that anybody would have one. :rolleyes:

3bvert · « **Reply #8 on:** August 14, 2009, 03:39:01 PM »

Quote from: laernu;75729

sorry but im kind of confused when you mean turn it another quarter turn you mean while on 24ft/lb?

the head botls are not torqued to a "final torque" that you can read on a gauge/bar. It is a stretch bolt, thus the sequence listed above
and you dont "tretorque" miles later either
when they stretch they actually thin out a bit , and can not be reused

invest in a good bentley manual, amazon .com had them a few weeks ago for about 44 shipped. its the best manual you can get for the cars, generally
unfortuantely you have a mid life car. the manual covers everything but the engine
the engione is covered in the e36 manual
or you can get it on line, I downloaded just the benley e36 manual section, just for that engine

JoeDellio · « **Reply #9 on:** August 14, 2009, 05:11:18 PM »

I have used stock head "bolts" on my DSM running 15lbs on a 16g. They were also meant to be a one time use bolt, I used them like 6 times before I bought ARP's to run 22psi. Im sure they will hold fine, but why not replace them anyways.