Question about replacing rubbers in '72 BB engine mount clamshells - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BossHogg69 · 10-16-2010, 08:15 AM

I'm looking at replacing the dry, cracked rubbers in the '72 BB engine mounts that are in my '69 Stepside. I would like to use polyurethane replacement mounts but have some questions about getting the old ones out without ruining the clamshells. Do the areas circled in red below just need to be drilled out to separate the top and bottom halves? What about putting them back together - do I tack weld them back after drilling them out? Am I way off base here or what?

**Tom Vogel** · 10-16-2010, 10:49 AM

As I recall. drilling is what I did. I beleive (if memory serves me correctly), that is what the Energy Suspension (polyeurithane) directions said to do.

**fine69** · 10-16-2010, 01:20 PM

Just put stock ones back in. Save yourself some time.

They will last another 40 years, by that time you will probably be dead.

10-16-2010, 08:15 AM	#1
BossHogg69 motor exploder Join Date: Mar 2009 Location: Pittsburgh, PA Posts: 2,346	Question about replacing rubbers in '72 BB engine mount clamshells I'm looking at replacing the dry, cracked rubbers in the '72 BB engine mounts that are in my '69 Stepside. I would like to use polyurethane replacement mounts but have some questions about getting the old ones out without ruining the clamshells. Do the areas circled in red below just need to be drilled out to separate the top and bottom halves? What about putting them back together - do I tack weld them back after drilling them out? Am I way off base here or what? Attached Images __________________ Adam 1969 Chevy CST/10 stepside, DART Big M/TREMEC Magnum Extreme/3.73's w/Detroit Truetrac 1965 Chevy Bel Air Wagon (daily driver), 327/TH350,10 bolt w/3.08's 1961 Chevy Bel Air Sport Coupe, ZZ454/M21/9" rear w/3.50's & Detroit Truetrac 2005 GMC 1500 ccsb 2wd, 6.0L/4L65e/3.73 G80 2006 GMC 2500HD ccsb 4x4, DMax LBZ/Allison 6spd/4.56's w/Detroit TrueTrac Use the SEARCH function on this forum - it is your friend!!

10-16-2010, 10:49 AM	#2
Tom Vogel 2WD Jimmy Join Date: Mar 2005 Location: Davis County, Utah Posts: 2,563	Re: Question about replacing rubbers in '72 BB engine mount clamshells As I recall. drilling is what I did. I beleive (if memory serves me correctly), that is what the Energy Suspension (polyeurithane) directions said to do.

10-16-2010, 01:20 PM	#3
fine69 Senior Member Join Date: Dec 1999 Location: Urbana,Ohio,USA Posts: 4,618	Re: Question about replacing rubbers in '72 BB engine mount clamshells Just put stock ones back in. Save yourself some time. They will last another 40 years, by that time you will probably be dead. __________________ 2008 Chevy HHR 1/2 panel. 1949 Chevy Panel truck(just sittin, waiting) Board member #6



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