C60X workshop manual

[Mark Sierant]

This truck is probally being held together by SPIDER SPIT dont use baggon all will be lost.

[David_Hayward (RIP)]

I wondered whether the GMC 270 as used in CMPs was in fact assembled in the Chevrolet Flint Motor Plant, rather than GMC's Pontiac, Michigan Plant.

[Lars Ulvestad]

Euan,

There is a workshop manual for C60X up for auction at ebay, but it is very expensive.

I have a original copy of the illustrated spare parts list for C60X, and as I don't have a C60X I am willing to trade it.

[Hanno Spoelstra]

Originally posted by Tony Smith
The GMC 270 engine (CCKW/DUKW)is not the same as the 270 fitted to the C60X but they are interchangable. The C60X 270 has a lot more Chev features than the US GMC 270.

Tony, I'd be very much interested in any details/scans about the differences between the GMC 270 engine fitted in CCKW's and CMP's as I have always wondered about this. The subject was discussed in the thread GMC 270 engine in CMP vehicles, but apparently that time you weren't around to help us out

Regards,
Hanno

[jim sewell]

Hanno
I have been trying to find out the differences in the above engines . I have just about finished a CCKW and would like to start on a C60X in the future .
I have taken 270 's out of a wrecked C60X and a CCKW and they were Staghound engines having the left and right engine numbers eg, ACR 4249 and ACL XXXX ( lost the note it was written on ).
The main difference I could see with the staghound eng , was the crank was longer in the front to support the twin pully harmonic balancer and the rear main cap had 4 bolts instead of 2 .
Main bearings seemed to be identical .
Exhaust manifolds were obviously different between the three vehicles , with the exhaust outlet on a CCKW coming straight down , the staghound out the front of the engine and the C60X on an angle to the rear of the vehicle .

Common parts between a 270 and a CMP 216 are the water pump , distributor , camshaft timing gear , front engine mount , timing cover , harmonic balancer ( cckw ) fuel pump , thermostat housing ( not outlet ) cam followers , exhaust valves , valve guides .

I have a std staghound block that I would like to rebuild and would like to know what the differences are before I start .
Would appreciate any info .

[Tony Smith]

Originally posted by Hanno Spoelstra
The subject was discussed in the thread GMC 270 engine in CMP vehicles, but apparently that time you weren't around to help us out

Where was I then?
I'm going to have to go back and get more pics of this truck, aren't I?
Some of the more obvious external differences:
The "Harmonic Balancer" on the front of the C60X crank is a press on fit with internal slot for hand crank handle, CCKW is a slide on fit with a retaining bolt with starter dog (like Ford).
C60X 270 makes 125hp at 3000rpm, CCKW is governed to 2700rpm, NOT TO BE EXCEEDED.
C60X distributor has vacuum advance/retard plus internal flyweights, CCKW just flyweights.

I don't have a parts book for a CCKW or DUKW, so can't compare part numbers, but if anyone else does, we can solve some riddles.

[Hanno Spoelstra]

Originally posted by jim sewell
The main difference I could see with the staghound eng , was the crank was longer in the front to support the twin pully harmonic balancer and the rear main cap had 4 bolts instead of 2 .
Main bearings seemed to be identical .
Exhaust manifolds were obviously different between the three vehicles , with the exhaust outlet on a CCKW coming straight down , the staghound out the front of the engine and the C60X on an angle to the rear of the vehicle .

Jim, Tony (good excuse!), here are some Staghound engine pics: front...

[Hanno Spoelstra]

...rear (since they are fitted rear to front in the Staghound)...

[Hanno Spoelstra]

...and side views, courtesy of Kris Zwiers' Staghound website.

[Euan McDonald]

Originally posted by Lars Ulvestad
There is a workshop manual for C60X up for auction at ebay, but it is very expensive.

I have a original copy of the illustrated spare parts list for C60X, and as I don't have a C60X I am willing to trade it.

Thanks Lars for the heads up, but ebay price a little steep for me. I will pm you on the parts list.
Euan.

[jim sewell]

Thanks for the pictures Hanno , I can see that the water pump is definately different , I cannot work out why they would have left and right engines in the engine serial numbers ie, acl and acr , maybe this was to make it clear that they were different from truck engines ?.

[cliff]

Originally posted by Hanno Spoelstra
...rear (since they are fitted rear to front in the Staghound)...

hmmm and here I was thinking you had had a few too many before posting Hanno

LOL