How bad is it gonna leak?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chaileyk5 · 07-07-2008, 06:53 PM

Dad bought the 72 new. Its got 95k on it. The top has never been off of it, and I'm itchin to do it

How bad is it going to leak when I put it back on in a couple of months?

bouncytruck · 07-07-2008, 08:08 PM

How shot are the body mounts? I'd suggest replacing them before you crack the top seal for the first time.Doing it while everything is still aligned and the top keeping it rigid will make putting it back on much easier and less likely to leak. If the body mounts are shot, and most likely they are, when you pull the top, the body will sag in the middle. This can cause the doors to bind and rattle and make putting the top back on difficult. You'll also see your ride quality improve with new body mounts.

If you get a good seal in the corners of the windshield, they really don't leak.

By the way, post some pictures of this 95K classic. We love seeing pictures!!!

Jtrux · 07-07-2008, 09:00 PM

I agree with Bouncy, body mounts would be a real good idea. I recommend the polyurethane ones. Without any experience at all it will take the good part of a weekend if everything goes well.

bouncytruck · 07-07-2008, 11:13 PM

I'd recommend the rubber repops. I've heard the poly mounts can squeek and are stiffer than the rubber. If he keeps the truck another 36 years, he might need to replace them again.

vtblazer · 07-08-2008, 06:23 AM

Quote:

Originally Posted by bouncytruck

I'd recommend the rubber repops. I've heard the poly mounts can squeek and are stiffer than the rubber. If he keeps the truck another 36 years, he might need to replace them again.

True on the poly's but they don't 'have' to squeak if a little time is taken to make sure they don't.

I applied a very liberal coating of anti-seize on the poly's I ran, never a sound...ever.

As far as making the ride more firm, of course they do.

It's factory repro rubber mounts for me next time though.

Bentblazer · 07-08-2008, 07:53 AM

This may be a stupid question but I replaced my body mounts from cab back: how tight do you do the bolts? Are they suppposed to bottom out or do you back off a little?

**bigdon-70blazer** · 07-08-2008, 08:06 AM

There are torque standards for these but I don't have them with me now, maybe someone has....

chaileyk5 · 07-08-2008, 08:42 AM

What is involved in changing the body mounts? I've never done that before.

Anybody know somewhere online that has a step by step process?

thanks

Jtrux · 07-08-2008, 09:13 AM

There is sooooo much info on changing these out, just search for it, I would but i'm in a rush right now. I'm not gonna lie, it's not easy.

vtblazer · 07-08-2008, 09:26 AM

Found these under :blazer body mounts: but there might be more using different search parameters.

5 pages of good reading either-way.

http://67-72chevytrucks.com/vboard/s...earchid=872389

**Yukon Jack** · 07-08-2008, 11:07 AM

Welcome to the board. All great advice listed above. You must post some pics of this K5 - think of it as your duty!

**Classic Heartbeat** · 07-08-2008, 12:01 PM

I agree with bouncytruck on the Body mount material. Urithane does not have any flexability and is almost like welding the tub to the chassis. That is the worce thing that you can do. The chassis in the Blazer, trucks, and suburbans are "C" channel constructed, not boxed tube and are extreemly flexible. The body or tub is spot welded together and is not flexible, so there has to be a material between them to allow one to move and not the other. If you do not allow for the movement the results are welds cracking, and body mounts eventualy pulling through the body. I have seen more than one truck come into my shop with dammage due to urithane bushings. Urithane is good for suspention, but that is it. WES

chaileyk5 · 07-08-2008, 05:47 PM

what are the rubber repops? i've never heard of them

albertarose · 07-21-2008, 08:46 PM

Thanks all this was good info ..my 72 blazer sagged as soon as took the top off ie doors hard to close etc.. then when I put it back on the holes did not line up very well ..under the truck it looks goo though not much rust ..where there is some is inside the cab in front of the doors and the rockers ..other than that the blazer is in very good shape and I really like driving it I bought it as an investment planning to re sell but think I may keep it dont see many of them here in alberta ..any way thanks again for the posts anf info about poly mounts not being a good idea

07-07-2008, 06:53 PM	#1
chaileyk5 Registered User Join Date: Jan 2008 Location: Chattanooga, TN Posts: 9	How bad is it gonna leak?? Dad bought the 72 new. Its got 95k on it. The top has never been off of it, and I'm itchin to do it How bad is it going to leak when I put it back on in a couple of months?

07-07-2008, 08:08 PM	#2
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,038	Re: How bad is it gonna leak?? How shot are the body mounts? I'd suggest replacing them before you crack the top seal for the first time.Doing it while everything is still aligned and the top keeping it rigid will make putting it back on much easier and less likely to leak. If the body mounts are shot, and most likely they are, when you pull the top, the body will sag in the middle. This can cause the doors to bind and rattle and make putting the top back on difficult. You'll also see your ride quality improve with new body mounts. If you get a good seal in the corners of the windshield, they really don't leak. By the way, post some pictures of this 95K classic. We love seeing pictures!!! __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

07-07-2008, 09:00 PM	#3
Jtrux I'm a poor spectator Join Date: Aug 2006 Location: San Antonio, Tx Posts: 2,287	Re: How bad is it gonna leak?? I agree with Bouncy, body mounts would be a real good idea. I recommend the polyurethane ones. Without any experience at all it will take the good part of a weekend if everything goes well. __________________ 2006 Jeep Unlimited IMPACT ORANGE 1993 Chevy 2500 4x4 ExCab LWB 454/NV4500 Tow rig 1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!! 1979 Ford F150 4x4 SWB Built Ford Tough!!! 1971 Chevy Blazer 350 / SM465 / NP205 UNDER CONSTRUCTION Soon to have a LQ4 6.0!!!

07-07-2008, 11:13 PM	#4
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,038	Re: How bad is it gonna leak?? I'd recommend the rubber repops. I've heard the poly mounts can squeek and are stiffer than the rubber. If he keeps the truck another 36 years, he might need to replace them again. __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

07-08-2008, 07:53 AM	#6
Bentblazer Registered User Join Date: Sep 2007 Location: Rolla Mo. Posts: 667	Re: How bad is it gonna leak?? This may be a stupid question but I replaced my body mounts from cab back: how tight do you do the bolts? Are they suppposed to bottom out or do you back off a little?

07-08-2008, 08:06 AM	#7
bigdon-70blazer Registered User Join Date: Jan 2007 Location: Poplar Bluff, MO Posts: 1,502	Re: How bad is it gonna leak?? There are torque standards for these but I don't have them with me now, maybe someone has....

07-08-2008, 08:42 AM	#8
chaileyk5 Registered User Join Date: Jan 2008 Location: Chattanooga, TN Posts: 9	Re: How bad is it gonna leak?? What is involved in changing the body mounts? I've never done that before. Anybody know somewhere online that has a step by step process? thanks

07-08-2008, 09:13 AM	#9
Jtrux I'm a poor spectator Join Date: Aug 2006 Location: San Antonio, Tx Posts: 2,287	Re: How bad is it gonna leak?? There is sooooo much info on changing these out, just search for it, I would but i'm in a rush right now. I'm not gonna lie, it's not easy. __________________ 2006 Jeep Unlimited IMPACT ORANGE 1993 Chevy 2500 4x4 ExCab LWB 454/NV4500 Tow rig 1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!! 1979 Ford F150 4x4 SWB Built Ford Tough!!! 1971 Chevy Blazer 350 / SM465 / NP205 UNDER CONSTRUCTION Soon to have a LQ4 6.0!!!

07-08-2008, 09:26 AM	#10
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Re: How bad is it gonna leak?? Found these under :blazer body mounts: but there might be more using different search parameters. 5 pages of good reading either-way. http://67-72chevytrucks.com/vboard/s...earchid=872389

07-08-2008, 11:07 AM	#11
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	Re: How bad is it gonna leak?? Welcome to the board. All great advice listed above. You must post some pics of this K5 - think of it as your duty! __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

07-08-2008, 12:01 PM	#12
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,766	Re: How bad is it gonna leak?? I agree with bouncytruck on the Body mount material. Urithane does not have any flexability and is almost like welding the tub to the chassis. That is the worce thing that you can do. The chassis in the Blazer, trucks, and suburbans are "C" channel constructed, not boxed tube and are extreemly flexible. The body or tub is spot welded together and is not flexible, so there has to be a material between them to allow one to move and not the other. If you do not allow for the movement the results are welds cracking, and body mounts eventualy pulling through the body. I have seen more than one truck come into my shop with dammage due to urithane bushings. Urithane is good for suspention, but that is it. WES __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

07-08-2008, 05:47 PM	#13
chaileyk5 Registered User Join Date: Jan 2008 Location: Chattanooga, TN Posts: 9	Re: How bad is it gonna leak?? what are the rubber repops? i've never heard of them

07-21-2008, 08:46 PM	#14
albertarose Registered User Join Date: Dec 2005 Location: alberta canada Posts: 162	Re: How bad is it gonna leak?? Thanks all this was good info ..my 72 blazer sagged as soon as took the top off ie doors hard to close etc.. then when I put it back on the holes did not line up very well ..under the truck it looks goo though not much rust ..where there is some is inside the cab in front of the doors and the rockers ..other than that the blazer is in very good shape and I really like driving it I bought it as an investment planning to re sell but think I may keep it dont see many of them here in alberta ..any way thanks again for the posts anf info about poly mounts not being a good idea



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