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torque specs on oil pan

A

Anonymous-0

Well-known Member
Would anyone know the torque specs for the bolts on an M's oil pan. Also on the water housing gasket on the left side of the engine. Thanks.
 
I don't know of any. I printed a "standard torque" chart off the internet. It lists the torques for NC and NF bolts in Gr3, Gr5, Gr8.
 
I am not trying to sound like a jerk when I say this. Tighten it evenly, and just enough to squish the gasket where it doesn't leak.
 
you would need a 3/8 inch lb. torque wrench anyhow to do that light torquing. it is not critical and just done by feel and watching the gskt. so it dont squeeze out.
 
(quoted from post at 18:47:30 08/14/12) you would need a 3/8 inch lb. torque wrench anyhow to do that light torquing. it is not critical and just done by feel and watching the gskt. so it dont squeeze out.
Click to expand...

I have one. It is from Harbor Freight so I will probably get scolded for that.
 
(quoted from post at 08:10:18 08/15/12)
(quoted from post at 05:30:01 08/15/12) This is the correct answer. Torquing the bolts is going to squash the gastket to shreds in places, Jim
Click to expand...

How do you figure?
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Curious about that myself. The correct torque should not destroy a gasket.

And for you folks that say to just tighten the bolts by feel, that only works if you have considerable experience in doing such things. A person with NO experience should always use a torque wrench.

If I can just remember where I stored some of my charts, I'll post some of the numbers.
 
(quoted from post at 13:37:42 08/15/12)
(quoted from post at 08:10:18 08/15/12)
(quoted from post at 05:30:01 08/15/12) This is the correct answer. Torquing the bolts is going to squash the gastket to shreds in places, Jim
Click to expand...

How do you figure?
Click to expand...

Curious about that myself. The correct torque should not destroy a gasket.

And for you folks that say to just tighten the bolts by feel, that only works if you have considerable experience in doing such things. A person with NO experience should always use a torque wrench.

If I can just remember where I stored some of my charts, I'll post some of the numbers.
Click to expand...

I think he is saying that the standard torque for a 3/8 bolt may be more than needed for the cork gasket.
 
With respect. A torque chart is designed to tighten bolts in samwiched metal, not 1/4" hick cork. When the gasket sqiishes out a little bit you will not be near the torque spec. Jim
 
but there should be a spec for the pan bolts. i would throw out a figure like 15 ft. lbs. on those 5/16 bolts. i believe if they were torqued to 15 lbs. the gskt would not be squished out. what i do is go around the pan about four times with a speed handle and you just get a feel when their good for tightness. say for example the bolt is good for 25 ft. lbs.in a chart, but your not torquing to that , just an even torque for the gskt.
 
(quoted from post at 17:25:48 08/15/12) is that for a 5/16 bolt?
Click to expand...

Sorry, that is for a 3/8" (9/16 socket) Gr 3 5/16" NC is 17 ft/lb and Gr 5 is 19 ft/lb. I use the Gr 3 spec for all dot head bolts unless they have different markings.

http://www.engineershandbook.com/Tables/torque.htm

I just found this one with a quick Google search, but the one I printed off and keep in the toolbox has what wrench size corresponds with what bolt size. I can be a dummy on that somedays. :roll:

That chart is tricky as it is dry torques. YOU SHOULD USE A CHART THAT USES WET TORQUES!!!
 
(quoted from post at 18:27:01 08/15/12) the oil pan bolts are 5/16, so my guess on them was close.
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Yes you were. 15 is probably the oiled torque spec. There is no way you could wreck a gasket at 15 ft lbs. Not to mention the fact that the rim of the pan has the strips of metal to help spread out the force of the bolt. No way in heck you can evenly torque to 15 ft lbs by hand.
 
There probably could be a guestimate, but differing gasket materials and pan straightness make it difficult to publish one that doesn't become policy when the policy should be feel and look of bulge. It is like the feel of making a basket in BB. when it is right, you can turn away before it swishes. Jim
 
True, the last pan gasket I bought was regular gasket material and not cork. That would certainly change the torque spec. That is also why there was no fear of over tightening.
 
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