Case 444 Engine knock.

CKain(MI) · Apr 14, 2017

I have a 1975 Case 444, K321 Kohler of course. Making a knocking sound.
I was thinking piston slap but a local repair guy told me the K series
has a issue with the oil pick up. Anyone experienced with that ? ? Thanks.

Bob · Apr 14, 2017

A K321 has a simple "dipper" on the rod as it's only oiling mechanism.

The "local repair guy" MAY having been thinking about KT17's which are a twin cylinder and DID have oiling issues with the first series.

First, if it has breaker points (rather than non-adjustable EI) set the timing using a timing light and adjusting the breaker gap accordingly as outlined in the shop manual to rule out "spark knock".

Your knock could well be piston slap, though. Some other possibilities would include valves set too "loose", connecting rod/journal wear, or camshaft or crankshaft endplay.

Camshaft endplay is spec'ed @ .005" to .010" and they WILL knock there is not properly shimmed.
Link to factory shop manual .pdf

Mark-Ia · Apr 14, 2017

The balance gears will also create a knock and will cause the engine to self-destruct. Most people take them out.

CKain(MI) · Apr 14, 2017

Thanks for the reply. Good possibilities !

Case 444 Engine knock.

CKain(MI)

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Bob

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Mark-Ia

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CKain(MI)

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