Motor Mount Help Please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

orange72350 · 09-29-2003, 01:59 PM

Replacing motor mounts in my truck when i put the new engine in (tonite) and need the proper lenght of the motor mount bolts. i know they are a 3/8 bolt, but need the proper lenght of the bolt. thanx alot guys
dale

**COBALT** · 09-29-2003, 02:14 PM

Is this on a SBC or BBC? With my SB I just reused the centerbolts from the old mounts. They didn't give me new ones, and the old ones were in fine shape after some cleaning...

If you need this truck as a daily driver I'd recomend reserving a weekend for that job. It took me a couple of days to get it done. I had to end up unbolting the towers, bolting those with the mounts to the engine, and using a couple of home-made guide studs made out of some 3/8" stock to get the holes to line up. What a pain...

orange72350 · 09-29-2003, 02:21 PM

wow. that sounds intense. i do neeed the truck as a daily driver, but its not going anywhere without the engine. anyways, its a sbc, a 350. i dont have the old bolts, they went mia. i dont know what happened to them,so i need measerments on the bolts in order to find the proper lenght. thanx alot
dale

crazy longhorn · 09-29-2003, 07:10 PM

the bolts that fasten the mount to the eng block are 3/8 -16 NC thread, 1" long should do the trick. On the bolts from the bottom of the stands into the mount, they are 7/16-14 NC thread....go 1 1/4 to 1 1/2", as they have a lock, & a large (also thick) flatwasher. Good luck,crazyL

orange72350 · 09-29-2003, 08:34 PM

thanx longhorn. perfect. dale

09-29-2003, 01:59 PM	#1
orange72350 Registered User Join Date: Jan 2003 Location: Cold, Snowy High Level, Alberta Canada Eh Posts: 394	Motor Mount Help Please Replacing motor mounts in my truck when i put the new engine in (tonite) and need the proper lenght of the motor mount bolts. i know they are a 3/8 bolt, but need the proper lenght of the bolt. thanx alot guys dale __________________ 2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!""

09-29-2003, 02:14 PM	#2
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Is this on a SBC or BBC? With my SB I just reused the centerbolts from the old mounts. They didn't give me new ones, and the old ones were in fine shape after some cleaning... If you need this truck as a daily driver I'd recomend reserving a weekend for that job. It took me a couple of days to get it done. I had to end up unbolting the towers, bolting those with the mounts to the engine, and using a couple of home-made guide studs made out of some 3/8" stock to get the holes to line up. What a pain... __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

09-29-2003, 02:21 PM	#3
orange72350 Registered User Join Date: Jan 2003 Location: Cold, Snowy High Level, Alberta Canada Eh Posts: 394	wow. that sounds intense. i do neeed the truck as a daily driver, but its not going anywhere without the engine. anyways, its a sbc, a 350. i dont have the old bolts, they went mia. i dont know what happened to them,so i need measerments on the bolts in order to find the proper lenght. thanx alot dale __________________ 2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!""

09-29-2003, 07:10 PM	#4
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	the bolts that fasten the mount to the eng block are 3/8 -16 NC thread, 1" long should do the trick. On the bolts from the bottom of the stands into the mount, they are 7/16-14 NC thread....go 1 1/4 to 1 1/2", as they have a lock, & a large (also thick) flatwasher. Good luck,crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

09-29-2003, 08:34 PM	#5
orange72350 Registered User Join Date: Jan 2003 Location: Cold, Snowy High Level, Alberta Canada Eh Posts: 394	thanx longhorn. perfect. dale __________________ 2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!""

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