F shim thickness and size - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Peanut74 · 05-23-2023, 11:12 AM

Ok, I lost my F shims and I don't want to pay the price being asked online. Can someone please tell me the gauge thickness of these shims? Also, a picture of the shim with a ruler next to it would also be appreciated. Thanks

**HO455** · 05-23-2023, 07:03 PM

Can you provide a picture? The only F shims I am aware of are spelled differently.
Stupid F#$&@* shim!

**Jason Banks** · 05-23-2023, 07:33 PM

72c20customcamper · 05-23-2023, 07:40 PM

Quote:

Originally Posted by Peanut74

Ok, I lost my F shims and I don't want to pay the price being asked online. Can someone please tell me the gauge thickness of these shims? Also, a picture of the shim with a ruler next to it would also be appreciated. Thanks

Couldn’t find my calipers but it looks to be an 1/8 inch

72c20customcamper · 05-23-2023, 07:45 PM

Not sure if you wanted all the measurements so here are a few

**kwmech** · 05-23-2023, 08:12 PM

Never in 30+ years can I recall, having seen that shim in a 67-72

72c20customcamper · 05-23-2023, 08:17 PM

They go in the inner fender to the cab at the firewall

**LockDoc** · 05-23-2023, 08:19 PM

Quote:

Originally Posted by kwmech

Never in 30+ years can I recall, having seen that shim in a 67-72

Yup, between the back of the inner panel and the angled cab stiffener. Where the large bolt with the big a$$ washer is....

LockDoc

Peanut74 · 05-23-2023, 10:08 PM

Thanks 72C20 that is the information I was looking for. Now I just need to make a print and make them. At this point of the project I have more time than I do money to finish it.

Peanut74 · 05-23-2023, 11:21 PM

Just in case someone else wants to make thier own.

I plan on making four of them tomorrow. Would be nice if I had a laser table but I'll be making them old school.

**71CHEVYSHORTBED402** · 05-24-2023, 01:48 AM

I may have to get a pair...https://www.ecklers.com/1967-1970-ch...-853626-1.html

**kwmech** · 05-24-2023, 02:26 AM

Quote:

Originally Posted by 72c20customcamper

They go in the inner fender to the cab at the firewall

Um, Ok still never seen them. Which is odd given the amount of trucks I've had and also parted out. I've seen slotted round shims in that location, or no shims at all

**Richard** · 05-24-2023, 02:33 AM

Quote:

Originally Posted by 71CHEVYSHORTBED402

I may have to get a pair...https://www.ecklers.com/1967-1970-ch...-853626-1.html

Where I got mine, bit better price and their flat rate shipping is many times better than others. https://www.classicparts.com/1967-72...ctinfo/37-935/

**GMCPaul** · 05-24-2023, 06:11 AM

https://gmcpauls.com/Bolts_&_Misc..htm
PART # 19892939 67-72 Inner Fender To Cab Frame Bolt F Shims 18.00PR
We carry the correct inner fender bolt with captured convex washers also that hold these in place.
Paul Jr @ GMCPauls

D-n-Tyke · 05-25-2023, 12:25 AM

Quote:

Originally Posted by LockDoc

Yup, between the back of the inner panel and the angled cab stiffener. Where the large bolt with the big a$$ washer is....

LockDoc

Is this a shim that was ALWAYS installed? I have taken apart a 1969 and a 1971 (1 owner, my Father in law) and niether of them had these shims installed.

howzzzit · 05-25-2023, 01:00 AM

My 72 C10 didn't have them.

**LockDoc** · 05-25-2023, 10:02 AM

Quote:

Originally Posted by D-n-Tyke

Is this a shim that was ALWAYS installed? I have taken apart a 1969 and a 1971 (1 owner, my Father in law) and niether of them had these shims installed.

Only if needed to correct any gap there might be between the inner panel and mounting surface. I have seen them with and without.....

LockDoc

howzzzit · 05-25-2023, 12:11 PM

Riddle me this. After reinstalling my inner fenders the drivers side fender sticks out farther than the door at the lower body line. Gaps are good. There weren't any F shims originally on this truck. Would tightening the nut and large washer push out on the lower part of the fender if there was a gap behind? Thinking it might? Guess I'll loosen it and see what happens. So the F shims can be installed from underneath the inner fender?
Thanks

**A1971Blazer** · 05-25-2023, 12:48 PM

Quote:

Originally Posted by howzzzit

Riddle me this. After reinstalling my inner fenders the drivers side fender sticks out farther than the door at the lower body line. Gaps are good. There weren't any F shims originally on this truck. Would tightening the nut and large washer push out on the lower part of the fender if there was a gap behind? Thinking it might? Guess I'll loosen it and see what happens. So the F shims can be installed from underneath the inner fender?
Thanks

I imagine they were made in the "F" shape so they could be inserted without difficulty on the assembly line if they were needed.
Loosen the bolt and see if that changes the fender issue...
keep us informed, I'll be hanging sheetmetal on my '67 soon

05-23-2023, 11:12 AM	#1
Peanut74 Registered User Join Date: May 2018 Location: Prattville, AL Posts: 590	F shim thickness and size Ok, I lost my F shims and I don't want to pay the price being asked online. Can someone please tell me the gauge thickness of these shims? Also, a picture of the shim with a ruler next to it would also be appreciated. Thanks __________________ -------------------------------------------------------- 1967 C10 "Snowball" (Currently in a million pieces down from a bazillion) 1989 Toyota DLX pickup "The Hulk" 2012 Jeep JKU "Crush" 1976 Chevy short bed with a 327 and 3 on the tree (Sold it to buy the Blazer) 1971 Chevy Blazer (Sold it)

05-23-2023, 07:03 PM	#2
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 10,808	Re: F shim thickness and size Can you provide a picture? The only F shims I am aware of are spelled differently. Stupid F#$&@* shim! __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

05-23-2023, 07:33 PM	#3
Jason Banks Senior Member Join Date: Dec 1999 Location: TX Posts: 1,519	Re: F shim thickness and size

05-23-2023, 07:45 PM	#5
72c20customcamper Registered User Join Date: Jul 2018 Location: Catskill Mountains,NY Posts: 8,145	Re: F shim thickness and size Not sure if you wanted all the measurements so here are a few Attached Images __________________ Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary.

05-23-2023, 08:12 PM	#6
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,391	Re: F shim thickness and size Never in 30+ years can I recall, having seen that shim in a 67-72

05-23-2023, 08:17 PM	#7
72c20customcamper Registered User Join Date: Jul 2018 Location: Catskill Mountains,NY Posts: 8,145	Re: F shim thickness and size They go in the inner fender to the cab at the firewall __________________ Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary.

05-23-2023, 10:08 PM	#9
Peanut74 Registered User Join Date: May 2018 Location: Prattville, AL Posts: 590	Re: F shim thickness and size Thanks 72C20 that is the information I was looking for. Now I just need to make a print and make them. At this point of the project I have more time than I do money to finish it. __________________ -------------------------------------------------------- 1967 C10 "Snowball" (Currently in a million pieces down from a bazillion) 1989 Toyota DLX pickup "The Hulk" 2012 Jeep JKU "Crush" 1976 Chevy short bed with a 327 and 3 on the tree (Sold it to buy the Blazer) 1971 Chevy Blazer (Sold it)

05-23-2023, 11:21 PM	#10
Peanut74 Registered User Join Date: May 2018 Location: Prattville, AL Posts: 590	Re: F shim thickness and size Just in case someone else wants to make thier own. I plan on making four of them tomorrow. Would be nice if I had a laser table but I'll be making them old school. Attached Images __________________ -------------------------------------------------------- 1967 C10 "Snowball" (Currently in a million pieces down from a bazillion) 1989 Toyota DLX pickup "The Hulk" 2012 Jeep JKU "Crush" 1976 Chevy short bed with a 327 and 3 on the tree (Sold it to buy the Blazer) 1971 Chevy Blazer (Sold it)

05-24-2023, 01:48 AM	#11
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,120	Re: F shim thickness and size I may have to get a pair...https://www.ecklers.com/1967-1970-ch...-853626-1.html __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025

05-24-2023, 06:11 AM	#14
GMCPaul Senior Member Join Date: Mar 2000 Location: Rockville,In. USA Posts: 3,718	Re: F shim thickness and size https://gmcpauls.com/Bolts_&_Misc..htm PART # 19892939 67-72 Inner Fender To Cab Frame Bolt F Shims 18.00PR We carry the correct inner fender bolt with captured convex washers also that hold these in place. Paul Jr @ GMCPauls __________________ Secure Online Catalog for-GMCPauls Truck Parts Email- GMCPAULS@GMAIL.COM

05-25-2023, 01:00 AM	#16
howzzzit Registered User Join Date: Dec 2005 Location: Kalifornia Posts: 307	Re: F shim thickness and size My 72 C10 didn't have them.

05-25-2023, 12:11 PM	#18
howzzzit Registered User Join Date: Dec 2005 Location: Kalifornia Posts: 307	Re: F shim thickness and size Riddle me this. After reinstalling my inner fenders the drivers side fender sticks out farther than the door at the lower body line. Gaps are good. There weren't any F shims originally on this truck. Would tightening the nut and large washer push out on the lower part of the fender if there was a gap behind? Thinking it might? Guess I'll loosen it and see what happens. So the F shims can be installed from underneath the inner fender? Thanks



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