Engine mount bolts

[66fleetsidewarrior]

I've got a 66 c10 and stupid question but I can't figure out the dimensions for the engine mount bolts. Replaced the mounts and lost the bolts and don't have anything near what will fit. Just was wanting some insight before I go buy bolts. Thanks

[tincan1966]

which bolts? mount to engine, frame stand to frame, or mount to stand?

mount to engine are 3/8' NC X 3/4" (recommend grade 8)
( if a V8, if it's an inline 6 use these for bracket to block, then 2 - 3/8 X 1"NC with lockwasher and nut for top two mount to bracket, and a 3/8"X 3/4" NC for the bottom mount to bracket-it threads into a welded nut)

for engine mount to frame stand- 7/16" X 1 1/4" NC with flat washer and lock washer, if a small block or a 6 cylinder. Big block with original type mounts uses a 7/16" X 2" NC bolt.

Frame stand to frame uses 3- 3/8" X 1"NC with flat washers, lock washers and nuts

These are not quoted from assmebly manual, just experience on what will work.

I use nothing but grade 8 bolts on all engine mounts.

hope this helps

[66fleetsidewarrior]

Originally Posted by tincan1966

which bolts? mount to engine, frame stand to frame, or mount to stand?

mount to engine are 3/8' NC X 3/4" (recommend grade 8)
( if a V8, if it's an inline 6 use these for bracket to block, then 2 - 3/8 X 1"NC with lockwasher and nut for top two mount to bracket, and a 3/8"X 3/4" NC for the bottom mount to bracket-it threads into a welded nut)

for engine mount to frame stand- 7/16" X 1 1/4" NC with flat washer and lock washer, if a small block or a 6 cylinder. Big block with original type mounts uses a 7/16" X 2" NC bolt.

Frame stand to frame uses 3- 3/8" X 1"NC with flat washers, lock washers and nuts

These are not quoted from assmebly manual, just experience on what will work.

I use nothing but grade 8 bolts on all engine mounts.

hope this helps

I am looking for the bolts that go from the frame and secure the engine mount s in place. Thanks for the info.