673 Engine On A Slant

[steve s.]

I have a 673 NA diesel in a B 613 (not original, I know ) that was installed on a slant, like you would see in a B 67 or a C model. I am preparing to overhaul this engine and maybe put it in a different truck. Is there any reason that it can't be mounted straight up ? Is it as simple as rotating it one bolt hole clockwise at the bell housing ? The oil pan and pump appear to be the same as in a B 61 I have that is mounted straight up. The engine leans to the passenger side and makes working on the injection pump or air compressor more challenging. I even had to drill a hole through the firewall to get the last push rod out before removing the back cylinder head. Does anyone have experience with this ?

Thank you and Happy New Year to All. Steve

[vanscottbuilders]

Steve,

There is no reason that the engine shouldn't go straight up

in the B-61.

I have both styles of bellhousings on 673 engines in the shop.

I'll take a look to see if just rotating the existing housing that

you have would do it. I don't believe that it will, but I'll check.

Paul Van Scott

[Paul]

I think you would have to change oil pan, water pump housing, and flywheel cover to install it in an upright position. On the B67 I cut up the flywheel cover was only drilled for the angled position. The water pump housing is offset to center the fan.

Paul

Edited December 31, 2008 by Paul

[theakerstwo]

I think you would have to change oil pan, water pump housing, and flywheel cover to install it in an upright position. On the B67 I cut up the flywheel cover was only drilled for the angled position. The water pump housing is offset to center the fan.

Paul

Here is a slant engine water pump.

[Rob]

Here is a slant engine water pump.

Good clear shot there Glenn. Isn't the pump the same as a standard B61, just the housing offset?

Thanks,

Rob

[HK Trucking]

Sounds to me like the original engine in the B61 went bad at some point, and the previous owner had an engine out of a B67 and just put it in the B61 "as is" without changing any accessories.

[theakerstwo]

Here is a slant engine water pump.

Old Rob is right again. But this is what is left of a C model but i think same water pump set up. I have not seen one in 30 years and did work on them years ago. I was in a old salvage yard yesterdfay and found a lot of old mack stuff.

[steve s.]

Thanks guys. That is the water pump I have Glenn, and HK I think you are right , somebody just stuck in the engine they had. But it makes maintenance so much more of a pain in the neck I wonder why they did it that way. If I do put this engine in a different truck it will be straight up . Steve