New squeaky cab mounts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Submariner616** · 07-28-2020, 10:53 PM

I just installed new rubber cab mounts on my '65 and now she squeaks going down the road! Ugh! Anyone know how to stop them from squeaking? Something that won't degrade the rubber?

SkinnyG · 07-29-2020, 12:21 AM

They should not squeak, as they should not be moving.

Are the bolts done up tightly?

Is something -else- squeaking, now that things are more rigid?

**Submariner616** · 07-29-2020, 02:14 AM

Good point. I'll double check.

AcampoDave · 07-29-2020, 07:12 PM

My new rubber cab mounts squeak too! I made sure they are tight and still the squeak goes on. Cheap ass China rubber probably.
I even went back and used the grade 8 bolts and tubes from my poly mounts to try to stop it and still no luck. The kicker is the poly ones never squeaked. They just transmitted a lot of harshness and vibration. I may put them back in though because the squeaking drives me nuts.

**Submariner616** · 07-29-2020, 08:16 PM

After I moved my gas tank to the back, under the bed, I removed the lower gas tank mounts before installing the cab mounts. I used large fender washers on the inside. I thought that might have caused some squeaking, but no. I was considering using a silicon lubricant on the rubber cushions and reassembling.

AcampoDave · 07-30-2020, 12:16 AM

Quote:

Originally Posted by Submariner616

After I moved my gas tank to the back, under the bed, I removed the lower gas tank mounts before installing the cab mounts. I used large fender washers on the inside. I thought that might have caused some squeaking, but no. I was considering using a silicon lubricant on the rubber cushions and reassembling.

Ditto everything you said. It's like you're posting about my truck. Except I only removed one gas tank mount and that's the one that squeaks. Washers were no help. On the other side, I cut only the tank flange and left the captive square nut and no squeaks. I have some leftover poly bushing grease and I will use it if it doesn't magically stop on it's own

**Submariner616** · 08-05-2020, 08:58 PM

I torqued the bolts to 80 ft lbs and it greatly reduced the squeaking a lot.

AcampoDave · 08-05-2020, 11:39 PM

Is that what they're supposed to be?

**Submariner616** · 08-06-2020, 12:12 AM

The spec in the manual says 70 - 90 ft-lbs

AcampoDave · 08-06-2020, 12:21 AM

Wow, I would've never guessed that they had to be so tight. Thanks for that I'll get out the ol' torque wrench and crank them down this weekend.

07-28-2020, 10:53 PM	#1
Submariner616 Active Member Join Date: Jan 2017 Location: Shawnee, KS Posts: 140	New squeaky cab mounts I just installed new rubber cab mounts on my '65 and now she squeaks going down the road! Ugh! Anyone know how to stop them from squeaking? Something that won't degrade the rubber? __________________ Submariner616 1965 Chevrolet K20 350 4 speed manual

07-29-2020, 12:21 AM	#2
SkinnyG Registered User Join Date: Feb 2012 Location: Beautiful BC, Canada, eh?! Posts: 2,267	Re: New squeaky cab mounts They should not squeak, as they should not be moving. Are the bolts done up tightly? Is something -else- squeaking, now that things are more rigid? __________________ 1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, turbo, LS 1977 Silverado: Shortboxed & dropped, potato-potato V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag Lotus Super 7 Replica: Scratch-built street-legal rollerskate

07-29-2020, 02:14 AM	#3
Submariner616 Active Member Join Date: Jan 2017 Location: Shawnee, KS Posts: 140	Re: New squeaky cab mounts Good point. I'll double check. __________________ Submariner616 1965 Chevrolet K20 350 4 speed manual

07-29-2020, 07:12 PM	#4
AcampoDave Registered User Join Date: Feb 2013 Location: central California Posts: 2,778	Re: New squeaky cab mounts My new rubber cab mounts squeak too! I made sure they are tight and still the squeak goes on. Cheap ass China rubber probably. I even went back and used the grade 8 bolts and tubes from my poly mounts to try to stop it and still no luck. The kicker is the poly ones never squeaked. They just transmitted a lot of harshness and vibration. I may put them back in though because the squeaking drives me nuts.

07-29-2020, 08:16 PM	#5
Submariner616 Active Member Join Date: Jan 2017 Location: Shawnee, KS Posts: 140	Re: New squeaky cab mounts After I moved my gas tank to the back, under the bed, I removed the lower gas tank mounts before installing the cab mounts. I used large fender washers on the inside. I thought that might have caused some squeaking, but no. I was considering using a silicon lubricant on the rubber cushions and reassembling. __________________ Submariner616 1965 Chevrolet K20 350 4 speed manual

08-05-2020, 08:58 PM	#7
Submariner616 Active Member Join Date: Jan 2017 Location: Shawnee, KS Posts: 140	Re: New squeaky cab mounts I torqued the bolts to 80 ft lbs and it greatly reduced the squeaking a lot. __________________ Submariner616 1965 Chevrolet K20 350 4 speed manual

08-05-2020, 11:39 PM	#8
AcampoDave Registered User Join Date: Feb 2013 Location: central California Posts: 2,778	Re: New squeaky cab mounts Is that what they're supposed to be?

08-06-2020, 12:12 AM	#9
Submariner616 Active Member Join Date: Jan 2017 Location: Shawnee, KS Posts: 140	Re: New squeaky cab mounts The spec in the manual says 70 - 90 ft-lbs __________________ Submariner616 1965 Chevrolet K20 350 4 speed manual

08-06-2020, 12:21 AM	#10
AcampoDave Registered User Join Date: Feb 2013 Location: central California Posts: 2,778	Re: New squeaky cab mounts Wow, I would've never guessed that they had to be so tight. Thanks for that I'll get out the ol' torque wrench and crank them down this weekend.



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