Questions about a 62

[70gmcjimmy]

Here is a couple of pics that I have questions about. The first 2 are a right and left view of the front engine mount of this V-6 GMC. The frame crossmember looks like a stock piece, but the block mount looks like a piece of angle iron scabbed in with a piece of rubber belt for the mount.

I hope the pics are clear enuff. Is this a factory setup?

The last pic is just crude with that pinched off line. Did these trucks originally have a hydraulic clutch? It has a z-bar linkage setup that looks too crude to be factory, with a hacked hole in the floorboard. I forgot to take a pic of the linkage. It feels like the front and rear brakes still work, altho it is hard to tell. Definitely have to pump the brakes to get a decent pedal. Fluid is OK.

Any help is appreciated.

Later---DAC

[62 short step]

60-62 has hydrolic clutches from factory, the motor mount I think is factory. My 63 GMC 4x4 motor mounts were the same as yours, wish I had pics for you.

[jchav62]

That motor mount look homemade to me. I'm not too sure about those GMC v6 motor mounts though.

[70gmcjimmy]

Guess I will have to go with 62 Short Step's theory there. The plates bolted to the side of the block look like they may have been a place to bolt side mounts too, but this engine may not be original. Yah Joe, I agree that they look home made.

Thanks---DAC

[62 short step]

Hopefully someone will post some pics of theirs.

[Tim K]

The '62 has a hydraulic clutch. The master cylinder has 2 cylindrers, one for the clutch (which in your case is pinched off because the fluid reservoir is common to both cylinders and would leak out if the clutch tube were disconected) and one for the brakes. The front mount is fabricated. The front moiunts on both the original 6's and 8's on the 62 were saddle type mounts with a much thicker rubber cushion than what yoi have. The slave cyliner for the clutch originally bolts to the bellhousing on both the 6's and 8's on the passenger side. Frankly, I don't know why the previous owner did not simply fabricate a new mount for the slave cylinder and keep the hydraulic clutch, instead of converting and hacking up everything to make it a manual clutch. Although I can't tell from the pictures, I'll bet the rear mounts are fabricated also, because the orignials on both the 6's and 8's were bolted to the bellhousing and then to a frame cross member. Unless the previous owner simply used the single point mount on the end of the trans, which is really a bad choice in view of the single point mount also on the front !

[70gmcjimmy]

Hey Tim, thanks for the info.

1st and 2nd are pics from the bottom of that front crossmember. It is definitely factory, rivited to the frame. I still have to go with 62 Short Step since he said his 4x4 GMC with a V-6 was the same. I bet that someone replaced a shot original rubber mount with a piece of belt.

The 3rd pic is the motor mount plate on the left side of the block that evidently was left on there from the truck it was in before this one. The right is also there, just didn't get a good pic.

4th pic is crappy, but its the right side bellhousing mount. Didn't get a good pic of the left. This also looks to be original.

5th pic is the mechanical clutch linkage setup that replaced the hydraulic slave cylinder setup.

Now to more questions.

Is it possible that a 2wd used saddle or side mounts, and 4X4 used this front mount? There is no evidence there were ever any frame motor mounts.
This theory would explain the mount plates left on the block after it was pulled out of a 2wd. It definitely has saddle type bellhousing mounts that look original for stability.

Did the V-6 blocks have a stock provision for the clutch ball as this looks? Maybe a coincidence that a hole was there for some other reason?

A generator was original on these wasn't it? This has an alternator but it has an abandon voltage regulator also.

Any info is greatly appreciated!!---DAC

[slorio]

I am unsure how much help I can be. I have a 1966 2WD GMC with a 305 E V-6. These trucks used the saddle mounts that you have left hanging on the side of your engine. They went to similar saddles bolted to a crossmember that crossed directly below that went all the way under the engine. You don't appear to have such a cross member?

The V-6's were drilled for manual clutch pivots. Bolting the pivot on the side of the block to make up the manual clutch wouldn't have taken any reengineering.

What model V-6 do you have in your truck? The number is located on the block in front of the right head above the fuel pump. You may be able to decipher the vintage on the engine by this number and referencing the following site:

6066gmcguy.org

I hope this is helpful.
Regards,
Steve
New Orleans

[70gmcjimmy]

Hello, Steve,

This info is VERY helpful! Thanks for the response! I will try to get some time a little later tonite to get the block number and go to that site.

As you thought there is no crossmember below the engine. The only crossmembers are pictured above, altho the rear one the bellhousing mounts on is a pretty bad pic.

I will let you know the engine info when I get to check it out.

Thanks again, Steve

Later---DAC