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Posted by: toadman Jun 29 2015, 08:55 PM

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.

Posted by: Dave_Darling Jun 30 2015, 09:07 AM

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

Posted by: toadman Jul 1 2015, 07:17 AM

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.

Posted by: 76-914 Jul 1 2015, 07:27 AM

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"

Posted by: Dave_Darling Jul 1 2015, 08:40 AM

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

Posted by: stugray Jul 1 2015, 09:04 AM

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)

Posted by: toadman Jul 1 2015, 11:54 AM

QUOTE(stugray @ Jul 1 2015, 07:04 AM)

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)

Posted by: dcecc1968 Jul 1 2015, 12:29 PM

QUOTE(toadman @ Jul 1 2015, 01:54 PM)

QUOTE(stugray @ Jul 1 2015, 07:04 AM)

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.