Perkins 4-318

Plant Doc · May 30, 2017

I have a friend that does part time mechanic work and has a Massey in his shop that has a Perkins 318 in it. He received this tractor with engine in pieces. I think he has the pistons in backward? I have never worked on a 318 but just looking at the head and the location of the injectors it appears the chamber in top of the piston goes towards the left or away for the cam. The pistons are aftermarket and have no markings on the top. What happens if he starts this and the pistons are in backward? I really cannot or do not want to get into this, but he is a good friend and I do not want to see him get himself into a big problem. I hope Dieseltech reads this and has has the answer. Thanks in advance.

Dieseltech · May 30, 2017

On any direct injected diesel the injectors need to be centered in the combustion bowl to burn clean, so on that engine the bowl needs to be toward the injection pump side of engine. Black smoke and low power will result if pistons or injectors are in wrong. On Deutz oil cooled engines for example in some Bobcat skid steers the injectors will fit 1/2 turn off, and engine will have excess smoke with low power also. Have seen that happen before..

rlp in Co. · May 30, 2017

I don't know about this engine but many engines have the wrist pin offset. Power will be way down.

Dieseltech · May 31, 2017

That's true, but on diesel engines the bowl offset MUST be correct if engine is to run efficiently..

Perkins 4-318

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rlp in Co.

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Dieseltech

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