Posted by NCWayne on September 05, 2013 at 10:51:15 from (98.21.228.82):
Got a friend with a 943 CAT loader with a normally aspirated 3204 CAT engine in it. Long story short it's been acting underpowered, etc for awhile and someone told him the engine was worn out. I looked at it last night and found water and algie in the fuel system, etc, and that could very easily explain his problems. Unfortunately the other guy had already started working on it so it can't be run at the moment.
Now, my suggestion to him, given what I found, is to do a compression check and see if the engine is actually 'worn out', or wether the problem lies elsewhere, before doing anything else. His biggest problem is having 'cash on hand' to do anything if the engine that's sitting in it actually had to be rebuilt.
That being said IF he needs an engine he has found a fresh, rebuilt one that would fit in a 953 that he can do some trading on so he's have no cash outlay....which would make his situation alot easier.
The main difference between the two engines is the turbo and extra HP gained by it. The NA in his is 80 HP, and the turboed one is 110 HP. I've talked to several people that agree with me in saying the 943 and 953 are basically identical machines as far as the drive train, with the main difference being the turbo. Basically other than a bit more track length, the driveline (ie transmission, etc) is all the same, so the only difference is the turbo adding a few extra HP. In other words there's no reason he can't swap one engine directly for the other. The only rub any of us can see is that the cooling system may be a bit small given the 30 additional HP, but given the way CAT does things with their cooling systems being oversized, that probably woudn't be an issue either.
Now, to throw even more into the mix, someone else told him he could take the turbo off the one engine, change the injectors and fuel settings, and have a NA engine. That sounds plausible in one respect, but having built quite a few engines over the years, I know there is often a difference in the pistons/compression ratio on a turboed engine vs a NA engine. Thing is I have never messed with one of the 3204's to know, and can't find anyone around here that knows either.
So, my questions are---- Has anyone else done a swap like this and what did you do to make it work?--- Two---Has anyone worked on one of the 3204's to know wether the internals on a T engine are the same as on a NA one?
Any answers or insight would be greatly appreciated.
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