Blazer body shim vs core support - The 1947 - Present Chevrolet & GMC Truck Message Board Network

T0ple55 · 05-30-2018, 09:19 PM

Wondering which way would be the better way to go. I either need to shim my core support up or take body shims out to get my front fender and door alignment. Any input is appreciated.

SeventyOne · 05-31-2018, 12:47 PM

Going to be really hard to diagnose problems like this but I know the B pilar alignment/shim is pretty critical.

First question though - do you have NEW body mounts in and is the top on?

T0ple55 · 05-31-2018, 01:05 PM

Body mounts are brand new. Ordered one of the full rubber sets from classic heartbeat I believe. I replaced the shims exactly as the were before. The top will not be going back on.

SeventyOne · 05-31-2018, 01:09 PM

hows the door to b-pillar alignment?

If thats good then keep moving forward towards the front of the truck.

T0ple55 · 05-31-2018, 01:23 PM

B pillar alignment is good, was a little bit of a pain but got it in place

hemi43 · 05-31-2018, 01:57 PM

Tub/body shims get done first for correct door alignment. The last body mounts to be adjusted are the rad support ones. Do it out of sequence and you'll end up with a can of worms.

chevyguy_72 · 05-31-2018, 03:18 PM

Are there any write ups on this? I just put mine back where they were as well... But am just starting to put doors etc on... and not sure what the PO might have done...
Thanks

SeventyOne · 05-31-2018, 03:48 PM

It's written about in the factory assembly manual. Maybe someone can post a pic. Also I do recall seeing it in previous threads - try searching.

T0ple55 · 05-31-2018, 07:56 PM

OK sooo. I'm going to go ahead and shim the core support then. Next question are there specific shims for accomplishing this, as mine had none before. Can I use body shims in the core support locations? What about some suburban/truck rubber mounting pads?

cleszkie · 05-31-2018, 09:02 PM

Quote:

Originally Posted by hemi43

tub/body shims get done first for correct door alignment. The last body mounts to be adjusted are the rad support ones. Do it out of sequence and you'll end up with a can of worms.

x2

1972 Banana · 06-06-2018, 03:19 PM

Would love to see the factory procedure as well, anyone want to share?

hemi43 · 06-07-2018, 08:34 PM

FWIW, it's been 3 years since the restoration, and I developed a small rattle in the driver's door latch area. I noticed the gap at the rear of the door was not parallel anymore and was wider at the top. I loosened the rear body mount on the driver's side as well as the one in front of it by the filler neck of the fuel tank. I added a 1/4" shim in both and tightened it back up. This was enough to get rid of the wide gap as well as the rattle by the latch.

chevyguy_72 · 06-10-2018, 08:20 AM

Is this the page you guys are referring to? Not much info here...

chevyguy_72 · 06-12-2018, 05:28 PM

Anyone?

Quote:

Originally Posted by chevyguy_72

Is this the page you guys are referring to? Not much info here...

T0ple55 · 06-18-2018, 10:00 PM

I dont believe it is, looking for the alignment of fenders to doors. whether to shim the core support or take the body shims out

Woodsloafer · 06-19-2018, 06:29 AM

Subscribed

hemi43 · 06-20-2018, 04:09 PM

Quote:

Originally Posted by T0ple55

I dont believe it is, looking for the alignment of fenders to doors. whether to shim the core support or take the body shims out

That has already been answered for you ! The core support shims will align the fenders to the front of the doors. It's really not rocket science. Don't touch the body tub shims unless you have door to body issues. Not trying to be rude, but if you can't visualize what needs to be done, then maybe it's best that you take it to someone that knows what to do.

T0ple55 · 06-20-2018, 04:22 PM

Quote:

Originally Posted by hemi43

That has already been answered for you ! The core support shims will align the fenders to the front of the doors. It's really not rocket science. Don't touch the body tub shims unless you have door to body issues. Not trying to be rude, but if you can't visualize what needs to be done, then maybe it's best that you take it to someone that knows what to do.

Yeah we got that much, my response was to the image members were looking for related to @seventyone and @bananas comment about it being in the factory assembly process

chevyguy_72 · 06-21-2018, 10:42 AM

Quote:

Originally Posted by T0ple55

Yeah we got that much, my response was to the image members were looking for related to @seventyone and @bananas comment about it being in the factory assembly process

And i was looking for the manual pages because my tub has been removed from frame as well as had floor etc patches welded in by the PO... so trying to figure out if my door alignment issues are related to missing shims from when they pulled the body and left them out or due to the repair work... so if someone can point me to the correct page in that manual or the correct manual it would be appreciated.
Thanks

SeventyOne · 06-21-2018, 12:19 PM

Let me dig out my book...

chevyguy_72 · 06-21-2018, 12:45 PM

Quote:

Originally Posted by SeventyOne

Let me dig out my book...

Would appreciate that...

**A1971Blazer** · 06-21-2018, 01:09 PM

This is from the factory assembly manual
Name: IMG_0425.jpg
Views: 900
Size: 55.3 KB

SeventyOne · 06-21-2018, 01:10 PM

thats it.

chevyguy_72 · 06-21-2018, 06:04 PM

Quote:

Originally Posted by A1971Blazer

This is from the factory assembly manual
Attachment 1795132

Cool thanks

05-30-2018, 09:19 PM	#1
T0ple55 Registered User Join Date: Apr 2014 Location: Arlington Wa Posts: 45	Blazer body shim vs core support Wondering which way would be the better way to go. I either need to shim my core support up or take body shims out to get my front fender and door alignment. Any input is appreciated. __________________ 72 GMC Suburban (dads) 69 SWB Chev (frame off father/son) 70 2wd Jimmy+69 4WD Blazer = PHASED 71 SWB stuffed in the barn

05-31-2018, 12:47 PM	#2
SeventyOne Registered User Join Date: Mar 2007 Location: Oakland, Ca Posts: 1,382	Re: Blazer body shim vs core support Going to be really hard to diagnose problems like this but I know the B pilar alignment/shim is pretty critical. First question though - do you have NEW body mounts in and is the top on?

05-31-2018, 01:05 PM	#3
T0ple55 Registered User Join Date: Apr 2014 Location: Arlington Wa Posts: 45	Re: Blazer body shim vs core support Body mounts are brand new. Ordered one of the full rubber sets from classic heartbeat I believe. I replaced the shims exactly as the were before. The top will not be going back on. __________________ 72 GMC Suburban (dads) 69 SWB Chev (frame off father/son) 70 2wd Jimmy+69 4WD Blazer = PHASED 71 SWB stuffed in the barn

05-31-2018, 01:09 PM	#4
SeventyOne Registered User Join Date: Mar 2007 Location: Oakland, Ca Posts: 1,382	Re: Blazer body shim vs core support hows the door to b-pillar alignment? If thats good then keep moving forward towards the front of the truck.

05-31-2018, 01:23 PM	#5
T0ple55 Registered User Join Date: Apr 2014 Location: Arlington Wa Posts: 45	Re: Blazer body shim vs core support B pillar alignment is good, was a little bit of a pain but got it in place __________________ 72 GMC Suburban (dads) 69 SWB Chev (frame off father/son) 70 2wd Jimmy+69 4WD Blazer = PHASED 71 SWB stuffed in the barn

05-31-2018, 01:57 PM	#6
hemi43 Registered User Join Date: Mar 2015 Location: Ontario Canada Posts: 1,526	Re: Blazer body shim vs core support Tub/body shims get done first for correct door alignment. The last body mounts to be adjusted are the rad support ones. Do it out of sequence and you'll end up with a can of worms.

05-31-2018, 03:18 PM	#7
chevyguy_72 Vintage Evil Join Date: Aug 2005 Location: Hastings, Nebraska Posts: 956	Re: Blazer body shim vs core support Are there any write ups on this? I just put mine back where they were as well... But am just starting to put doors etc on... and not sure what the PO might have done... Thanks __________________ Current Rides: Vintage Evil - 72 Chevy C10 (Always a work in progress) Vintage Evil Build Thread EvilK5 - 71 K5 Blazer Evil Twin - 2006 Suzuki M109R EvilDmax- 2018 GMC 2500 Denali Duramax

05-31-2018, 03:48 PM	#8
SeventyOne Registered User Join Date: Mar 2007 Location: Oakland, Ca Posts: 1,382	Re: Blazer body shim vs core support It's written about in the factory assembly manual. Maybe someone can post a pic. Also I do recall seeing it in previous threads - try searching.

05-31-2018, 07:56 PM	#9
T0ple55 Registered User Join Date: Apr 2014 Location: Arlington Wa Posts: 45	Re: Blazer body shim vs core support OK sooo. I'm going to go ahead and shim the core support then. Next question are there specific shims for accomplishing this, as mine had none before. Can I use body shims in the core support locations? What about some suburban/truck rubber mounting pads? __________________ 72 GMC Suburban (dads) 69 SWB Chev (frame off father/son) 70 2wd Jimmy+69 4WD Blazer = PHASED 71 SWB stuffed in the barn

06-06-2018, 03:19 PM	#11
1972 Banana Registered User Join Date: Nov 2006 Location: Moncks Corner SC Posts: 118	Re: Blazer body shim vs core support Would love to see the factory procedure as well, anyone want to share?

06-07-2018, 08:34 PM	#12
hemi43 Registered User Join Date: Mar 2015 Location: Ontario Canada Posts: 1,526	Re: Blazer body shim vs core support FWIW, it's been 3 years since the restoration, and I developed a small rattle in the driver's door latch area. I noticed the gap at the rear of the door was not parallel anymore and was wider at the top. I loosened the rear body mount on the driver's side as well as the one in front of it by the filler neck of the fuel tank. I added a 1/4" shim in both and tightened it back up. This was enough to get rid of the wide gap as well as the rattle by the latch.

06-10-2018, 08:20 AM	#13
chevyguy_72 Vintage Evil Join Date: Aug 2005 Location: Hastings, Nebraska Posts: 956	Re: Blazer body shim vs core support Is this the page you guys are referring to? Not much info here... Attached Images __________________ Current Rides: Vintage Evil - 72 Chevy C10 (Always a work in progress) Vintage Evil Build Thread EvilK5 - 71 K5 Blazer Evil Twin - 2006 Suzuki M109R EvilDmax- 2018 GMC 2500 Denali Duramax

06-18-2018, 10:00 PM	#15
T0ple55 Registered User Join Date: Apr 2014 Location: Arlington Wa Posts: 45	Re: Blazer body shim vs core support I dont believe it is, looking for the alignment of fenders to doors. whether to shim the core support or take the body shims out __________________ 72 GMC Suburban (dads) 69 SWB Chev (frame off father/son) 70 2wd Jimmy+69 4WD Blazer = PHASED 71 SWB stuffed in the barn

06-19-2018, 06:29 AM	#16
Woodsloafer Registered User Join Date: Jun 2018 Location: Royalston, MA Posts: 55	Re: Blazer body shim vs core support Subscribed

06-21-2018, 12:19 PM	#20
SeventyOne Registered User Join Date: Mar 2007 Location: Oakland, Ca Posts: 1,382	Re: Blazer body shim vs core support Let me dig out my book...



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06-21-2018, 01:09 PM	#22
A1971Blazer Senior Member Join Date: Nov 2013 Location: East Tennessee Posts: 2,200	Re: Blazer body shim vs core support This is from the factory assembly manual __________________ 1967 C10 Step side 1968 C10 Step side 1970 Chevrolet K/5 Blazer 1972 Chevrolet K/5 Blazer .............

06-21-2018, 01:10 PM	#23
SeventyOne Registered User Join Date: Mar 2007 Location: Oakland, Ca Posts: 1,382	Re: Blazer body shim vs core support thats it.

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