I am re-assembling my engine. I looked in my Haynes manual, tech specs booklet and factory service manual and could not find torque values for the four impeller housing nuts. Are there torque values for these nuts or do they just need to be snugged up?

Thanks for the help.

About 9 lb-ft. There are standard torque values for various size fasteners, but since magnesium alloy is softer you have to use less.

Just snugged up is probably a reasonable approximation.

--DD

Thanks, Dave.

I could not find a torque value for the cylinder head temp sensor either so I torqued it to 10 ft. lbs. This was before I read your post.

Unless there is a published value somewhere that is much different than this, I think I will leave it alone.

I copied this a few years ago. From our recently departed mentor:

"In general, 8mm bolts call for 14.7 ft/lbs, but 18-19 is OK. 10mm fasteners use about 35 ft/lbs, and 12mm use 56 or so. Do that and you'll be OK.

The Cap'n"

That's into steel. Into aluminum, you use about 75% of that value. Into magnesium, I don't know. So I took a guess at 66% or so.

--DD

My rule of "finger" for fasteners of that size is to use a 1/4" ratchet and tighten with just thumb & one finger.

For torquing larger fasteners I go by: Snug < Grunt < Fart < Grunt+Fart
Where Grunt+Fart =~ 90-100 Ft Lbs (wheel lug torque)

As I get older I find that this method is unreliable. The farts and grunts come at lower levels than when I was a younger man.

Assuming you calibrated yourself at age 30, and say now you are 50, the new grunt+fart torque formula would be grunt + fart = (30/50) x (90 to 100 ft-lbs) = 54 to 60 ft-lbs