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Discussion in 'The Garage' started by Chevy305, Aug 27, 2006.
What do I torque the body mounts to on my 85 K10?
I tightened mine as tight as I could get them. The guy helping me kept saying "that's 275 lbs"........
So should I let my impact wrench loose on them or do it by hand?
I would do them by hand and make them damn tight, no real torque spec i believe i dont think it really matters just as long and the rubber is smooshed and they are tight enough there not gunna let loose.
Ok I guess I will have whip out my breaker bar and tighten the hell out of them.
I know this thread is a little older, but one of my cab mounts (K30, single cab) broke the other day. I replaced the old ones with new poly bushings about 3 months ago and tightened them really well.
Now while offroading the hole in one of the bottom cups teared out (what a bang!!) and the lower mount fell down. Is this because i tightened them too much or couldn't the 22 years old rusty cups just withstand any longer?
Thanks in advance.
i'd say probably the cup was deteriorated. mine looked fine and i reused them but there were a couple that came out in pieces when i took the bolts loose to install the body lift. my advice would to just use huge flat washers or find the cups in an LMC book. that's probably what imma do
can't be too tight. Your body and your engine are supposed to stay where you put them. If it wasn't rust it might have worked loose a little, the free play allowing for more force... My bet would be on rust though.
An instruction sheet I got way back in the early 90's from Energy Suspension states to torque the bolts to 85 ft. lbs. so there can still be a slight flex.
All the instructions I've gotten in the later years didn't have any torque readings. So, I'm sticking with 85 ft. lbs.
Ok, I will torque them all to 85 ft. lbs., maybe using some locktite on the bolts. The original rubber bushings are way more flexible, even full torqued.
Thanks again guys!
Thought of this thread as I was browsing the '91 R/V manual.
Core support nuts are 35 ft lbs
Cab mounts are 55 ft lbs for bolts, 35 ft lbs for nuts.
I was looking at the Energy Systems instructions and found this line:
When all mounts and hardware are installed, torque all bolts to factory
According to the service manual, the body mounts are torqued from 35 to 55 ft - lbs depending on truck model and location.
For the K5:
Position #1 - 35 ft-lbs
Position #2 - 55 ft-lbs
Position #3 - 45 ft-lbs
Position #4 - 35 ft-lbs
Position #5 - 35 ft-lbs
What year service manual? Odd that they threw in the random 45 ft-lbs there.
1979 Light Duty Truck Service Manual. The listing is a little screwy.
That would be a great question for ORD in the vendor section. I'm getting ready to order a 1" body lift, so the information would be good to have.
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