6 cyl Ford Compression

pcrh · Sep 3, 2021

Hi:

I have just acquired a New Holland 1400 with a 6 cylinder Ford diesel motor. Unit runs rough and after doing some tracing I believe the problem is compression. There is good fuel to each injector.

I would take the injectors off to test compression, but have never experienced this before. So, before I do, I am looking for pointers. What should I be aware of and what procedure should I follow.

Thanks

Bern · Sep 3, 2021

Do you know what engine it is exactly? I looked at a sketch of the engine in the NH parts catalog, but it's not much help. Can you post some
pics of the engine?

warbaby · Sep 4, 2021

probably a Dorset 2715E/380D?

pcrh · Sep 4, 2021

Hi:

The information I have is the engine is a 380 ford industrial 107 hp motor. I found this picture at https://www.mycnhistore.com

and it does match the one I have. I will see if I can get a better picture later today.

Bern · Sep 4, 2021

That was the same image I found, which wasn't much help at the time. That said, the image does look like the engine that warbaby posted. I
have no personal experience with those engines, however it does look somewhat similar to a Ford 6000 diesel engine in some ways.

If it really is like a 6000, doing a compression test on that engine will be a PITA. The pushrods have to be removed and reinstalled every
time you remove an injector and install the compression test adapter.

Low compression usually doesn't make an engine run rough unless a cylinder is completely dead. What does your blowby look like? Do you feel
any pulsing out the bottom of the blowby tube?

Fordfarmer · Sep 4, 2021

The NH 1400 ran the Ford Dorset Industrial, model 2715E (380 c.i.) I just sold mine a few months ago. They are a newer design than the 6000's 242, but still lack the cross flow heads of the 3, 4, and 6 cylinder tractor engines.
I'm no help on doing a compression test, but I agree that the problem is likely elsewhere, unless one cylinder is completely dead.
Has the oil in the injection pump been changed? Maybe a sticking plunger or two...

pcrh · Sep 4, 2021

Hi:

warbaby: yes that is what the engine looks like, except this one is dirtier and yellow (Grin).

I lack service experience with diesels, much better with gas motors.

I did crack each line to verify diesel to each injector and flow is very similar to each. Not a perfect test but it does sort of imply fuel to each injector.

My hunch is problem with cylinder, but I could be wrong. Sticky valve maybe?

Thanks for your thoughts

Sean in PA · Sep 5, 2021

My hunch is problem with cylinder, but I could be wrong. Sticky valve maybe?

Or possibly a clogged injector.

pcrh · Sep 5, 2021

Hi:

Either way I would have to take the injectors out to check, right.

6 cyl Ford Compression

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