Engine Accessories Torque Specs (For Dummies)

Other than cylinder-head-tightening bolt-torques, I see nothing in my manual about the rest of the fasteners used on the motor? For instance using a grade 8 bolt and split washer what should the torque be to bolt down the water-pump? Clutch? Flywheel? Headers?…Etc?

Using my elbow and feel, I tightened down the 5/16-18 water-pump bolts and then measured what I did, and I got about 28 ft/lbs. (Not bad according to the chart below.)

I did find this chart from Imperial “Suggested Assembly Torque Values”. Do you think these numbers are acceptable for motor-accessory assembly? What do you seasoned mechanics do?

http://www.imperialsupplies.com/pdf/A_FastenerTorqueCharts.pdf

Thanks!

 

OK, not a single reply. I guess I get the lame-o of the year award!

Either it is such a stupid question that even a new-bie with the IQ of 12 should know the answer to, I answered it myself, or there is no real answer?

Please try to understand, I don't know Jack about this stuff...lol

 

Actually there is a factory torque setting for every fastener on an automobile. Most are never used after the car is assembled and sold.

 

You need to get a old Motors repair book that covers the year that you need. My book has torque specs for the heads, Flywheel, clutch, intake, exhaust, spark plug, valve cover, oil pan cover, some in lbs (heads, flywheel) and some in inch pounds (valve cover,oil pan cover)

 

Excellent! That is exactly what I needed to know! The manual is on it's way!

Thanks!

 

*****Update*****

Well somehow the manual got lost in the mail, and I have to find another...

But I found this: http://edge-op.org/1949_Oldsmobile/index.php?page=8

I hope this helps others looking for this info...

 

You can indeed use a general torque spec chart that is based on bolt sizes. Just be careful with things like flywheel, clutch, head, and manifold bolts. The rest of them usually can be tightened without a torque wrench, if you've done enough wrenching that you've developed a feel for it.

Working on stuff like automatic transmissions is another area where you should take the time to find a manual with specific torque specs.

 

Definatly NOT a lame question. Just keep in mind whether or not the bolts will have some kind of lubrication on the threads before assembly. Lubrication is not just limited to oil or Moly. Sealants as well as Locking compounds also play a small factor in your torque settings. Most of your specs will be listed for assembly of DRY threaded componants. Make sure your bolt threads and the threads of the componant are clean!! Small investment into a thread CHASING set is worth while if your going to be doing this often. At the very least, spray some laquer thinner into the threaded hole, and try and get a bristle brush, even a small toothebrush to clean out the female threads. Then blow out with compressed air. Hope that help, good luck, TR