[AT] Deere 303 engine

charlie hill charliehill at embarqmail.com
Sat Oct 16 20:54:52 PDT 2010


John,  I'm not familiar with that engine but make sure to check the casting 
(freeze) plugs in the head.  One of them might have rusted through or have 
been pushed out a bit from freezing.   If you have to replace them see if 
you can get brass plugs.

Charlie

--------------------------------------------------
From: "john hall" <jtchall at nc.rr.com>
Sent: Saturday, October 16, 2010 9:02 PM
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Subject: [AT] Deere 303 engine

> I've got a 303 gas engine in my Deere 55 combine. It has given me quite a 
> fit with water leaks this year. A week before combining wheat I went to 
> change the oil filter and found water in the oil. I changed the head 
> gasket and cut the wheat without any further leaking. We left it sitting 
> for 2 months, cracked the drain plug and no water so we filled it up with 
> anti-freeze and began getting it ready to cut beans. Today we were making 
> final preparations to cut and I found water in the oil (my guess is 1-2 
> quarts). I've flushed everything out and am going to treat the engine with 
> some block sealant. If this works I'll worry about the leak this winter. 
> Is there anyone on the list aware of these engines developing leaks or 
> cracking heads? My guess is a sleeve o-ring. I've ran across some engines 
> that had common problems of cracking the block between the sleeves or 
> heads that just didn't hold up, wondering if this is one of those. If this 
> were in a tractor, diagnosing the problem w!
> ouldn't be so bad. But when the engine is 8ft in the air, everything 
> changes.
>
> John Hall
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