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post #1 of Old 10-06-2019, 12:20 PM Thread Starter
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Tracs's Avatar
Join Date: Nov 2014
Location: Manitoba, Canada
Posts: 500
John Deere 332 Compression


In my never ending curiosity I bought a diesel compression tester to test my 332's engine. The engine runs great, tiniest bit of hard starting when cold, but overall a great runner.

I use the tractor mainly to push and blow snow in the winter. I have found the 47" 2 stage snowblower can stall out the engine.

I tested the engine cold with the glow plugs removed and the fuel shut off disconnected.

I got

1. 400psi
2. 405psi
3. 415psi.

All pretty even and I think the numbers are fine. The manual calls for minimum of 355psi with max difference of 70psi between cylinders.

Does anyone know what a good running or fresh yanmar 3TN66UJ would have for compression?
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