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Cylinder Head bolt torque values - Model 921153101

Air leaks between the head and the cylinder. The manual's trouble shooting guide says be sure the bolts are torqued properly, but does not specify the proper torque value. What is the proper torque value for the 4 cylinder head bolts? Are the parts assembled dry or do they get some sort of lube/sealant? Thank you for your help.

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Manage My Life
i think i have the same issue, pressure takes a long time to build and only to 90 psi, i removed head and found middle of head gasket torn. this is a fairly new machine , i would like to know what you fabricated the new head gasket out of or with before i buy a stock one.
by Manage My Life
April 25th, 2011
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Manage My Life
Torque values are probably better at 7 or 8 ft lbs. I torqued one of them to 10 and stripped it. Easily fixed with a longer (M6 x 45, 1.00 pitch) bolt and shakeproof nut, which I'll eventually do on the other three as a preemptive fix. That still didn't solve the low pressure so I fabricated a new head gasket. Turns out the old one had a weak spot in the middle, between the two chambers of the head, so the compression side could leak into the intake side, thus ruining the pressure. Put it all back together and it works fine. Thanks for the tips!
by Manage My Life
February 28th, 2011
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Mark T
Thank you for your question.

I should be able to help you with the torque specifications on the air compressor. I have checked all of the information we have and could not find the torque specifications for the head bolts. I called the manufacture and the torque is 7-10 ft pounds. You do not need to put anything on the bolts. If they are properly torque, I suspect a defective head gasket. If you need to order a new head gasket you can do so from our parts website:

Sears Parts Direct

.

Please let me know if need further assistance on the repair of the air compressor.

Thank you for using Manage my life.

Mark T.
by Mark T
February 22nd, 2011
Answered in 19 hours
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Manage My Life
That's certainly a starting point. We'll see what the techies say. Thanks for your help.
by Manage My Life
February 21st, 2011
Answered in 23 minutes
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Joseph Perez
I know how important it is to make proper adjustments on your air compressor so that it can be working up to speed. While you are waiting for an expert answer, I did manage to find a link that describes a similar model number and I hope it can be of some help.
by Joseph Perez
February 21st, 2011
Answered in 6 minutes
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