Farm Equipment - D14 Water Leak

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D14 Water Leak

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=194626
Printed Date: 13 Nov 2025 at 12:25am
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Topic: D14 Water Leak

Posted By: ChillyB
Subject: D14 Water Leak
Date Posted: 15 Apr 2023 at 3:27pm

Giys,

New to me D14 had a sticky valve, bad rotator, bent pushrod (all rated to #3 exhaust). So I pulled the head for repairs, lapped valves, etc.

Now it runs like a top but I have a water leak. Water is coming down left side from front of the head. Can't if it's the head or back or water pump. Wasnt leaking before head R&R so my hunch is head related? Also milky oil now. So internal oil leak, too.

Head bolts were replaced. Used washers since heads were smaller and bolts were slightly longer. I was pretty careful to measure available threads so I didn't bottom them out.

I used some RTV infer and on the right middle long bolt because it passes through the head water jacket. Is there another intersection into water jacket that I missed and failed to seals?

Added that I torqued bolts to 60 ft-lb.

Replies:

Posted By: jaybmiller
Date Posted: 15 Apr 2023 at 3:57pm

Maybe one of the water pump bolts for the genny adjuster might be 'kinda loose' ?

I recall water 'magically' appearing when I was replacing the genny with alternator on one of my D-14s.

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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

Never burn your bridges, unless you can walk on water

Posted By: ChillyB
Date Posted: 15 Apr 2023 at 4:10pm

I dont know which bolt that would be since mine now has an alternator.

After some cooldown I pulled bolts to 65 up from original 60 ft-lb. The external leak is gone. I'll drain off the water tomorrow and monitor if I'm still transferring water.

Posted By: jaybmiller
Date Posted: 15 Apr 2023 at 4:52pm

it was the one that has/had the slotted bar that you move the genny/alt to put tension on the Vbelt.

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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

Never burn your bridges, unless you can walk on water

Posted By: ChillyB
Date Posted: 15 Apr 2023 at 5:28pm

My otter bar ties to back left t-stat bolt. Which looks cobbled so probably not the one you're referring to.

Posted By: steve(ill)
Date Posted: 15 Apr 2023 at 6:25pm

not uncommon for them to leak at the freeze plugs in the head, under the rocker arm... or around the liner o-rings dripping into the pan.....

But since you have an EXTERNAL leak also, the head gasket is a good bet right now.

When you drain the oil, fill the radiator full and let it set for a couple hours with the oil drain plug out and see if you get any more DRIPPING... just to eliminate other possibilities.

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Like them all, but love the "B"s.

Posted By: ChillyB
Date Posted: 15 Apr 2023 at 6:35pm

I watched the Welch plugs while it was running. Saw no leakage from those. Before I crank itnagain I'll have the plugs out. Just to be safe.

Posted By: ChillyB
Date Posted: 17 Apr 2023 at 10:40am

Brought head bolts up from 60 ft-lb to 65 ft-lb and the external leak stopped. Changed the oil, and no more milky mess so internal leak is also stopped.