3406c to 6nz engine swap

Just lengthen your drive shaft and call it a day.

 

If they mount the same then why didn't they just use the mounts off the old C?

 

Usually a shop will take the path of least resistance in a job like that. I'm thinking there must be a reason for what they did.

I do know the engine manufacturer has to know what truck manufacturer it's being sold too. Paccar has different engine mounts then say westernstar. Or international. Depending on where it's going they set up the flywheel housings and front mount accordingly.

Its possible that 6nz was out of a Volvo or something else other then a paccar product. Heck, westernstar dont even have rear motor mounts . They are on the transmission.

When I did my swap the E was out of a kenworth and was going into another KW so that's probably why I had no issue

 

Well I don't know the first thing about caterpillar engines.

But I can tell you that I put a big cam engine in my truck that had a series 60 in it.

Just from that experience I can tell you as @swann stated, the motor mounts are specific for the truck manufacturer.

It's hard for me to Envision how those motor mounts could shift the engine 2 in forward. I believe what you're saying but I have a hard time understanding that because wherever that Mount is on the flywheel housing is where it is. That is where it's going to sit into your chassis mounts on your truck and that's it. I don't think changing the motor mounts has any effect on the forward or rearward movement of the engine Unless somehow they're offset. All of the ones that I have seen, wherever the bolts are, the mount is centered to those bolts, on the flywheel housing mounts anyway.

The thing that would concern me is the Driveline angles. The original motor mounts that are made for that manufacturer of truck are made in such a way that your engine is sitting properly for the right Driveline angles.

Is it possible that maybe your engine isn't sitting forward but it's sitting higher making your Driveline seem shorter?

 

Well I don't know the first thing about caterpillar engines.

But I can tell you that I put a big cam engine in my truck that had a series 60 in it.

Just from that experience I can tell you as @swann stated, the motor mounts are specific for the truck manufacturer.

It's hard for me to Envision how those motor mounts could shift the engine 2 in forward. I believe what you're saying but I have a hard time understanding that because wherever that Mount is on the flywheel housing is where it is. That is where it's going to sit into your chassis mounts on your truck and that's it. I don't think changing the motor mounts has any effect on the forward or rearward movement of the engine Unless somehow they're offset. All of the ones that I have seen, wherever the bolts are, the mount is centered to those bolts, on the flywheel housing mounts anyway.

The thing that would concern me is the Driveline angles. The original motor mounts that are made for that manufacturer of truck are made in such a way that your engine is sitting properly for the right Driveline angles.

Is it possible that maybe your engine isn't sitting forward but it's sitting higher making your Driveline seem shorter?

 

Need truck make and last six of VIN. By pic guessing Peterbilt ànd the C and E overlapped in the mid nineties so most likely same rear mount legs.