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Garden Tractors Discussion Forum

Case 444 Engine knock.

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Author  [Modern View]

04-14-2017 07:59:07

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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.

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04-14-2017 09:56:33

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 Re: Case 444 Engine knock. in reply to ckain(mi), 04-14-2017 07:59:07  
The balance gears will also create a knock and will cause the engine to self-destruct. Most people take them out.

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04-14-2017 09:35:27

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 Re: Case 444 Engine knock. in reply to ckain(mi), 04-14-2017 07:59:07  
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.

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04-14-2017 10:07:12

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 Re: Case 444 Engine knock. in reply to Bob, 04-14-2017 09:35:27  
Thanks for the reply. Good possibilities !

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