Farm Equipment - Oil in intake, ports

Oil in intake, ports

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=199978
Printed Date: 13 Nov 2024 at 3:23pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Oil in intake, ports

Posted By: jlogli
Subject: Oil in intake, ports
Date Posted: 25 Feb 2024 at 3:51pm

1967D 17 series 4 gas. Recently purchased the tractor it was left outside and had water down the exhaust and got stuck took the head off freed up the pistons and got things moving again. Had one valve stuck, cleaned all the valves up and put them back in the head and relaped them. Started up easy was running good, and all of a sudden started running like it was rich. Noticed there was an oil substance leaking out between the port, on the head intake port on the head and the manifold mating surfaces. Any ideas? Thank you.

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1945 WC on full steel, WD wide front, WD45 power steering, 1966 D-17IVfactory 3 point.1967 D-17IV SC. 1973 rotobaler white top. orange top roto, model 90 combine,82S, four bottom plow.302 baler.

Replies:

Posted By: tbran
Date Posted: 25 Feb 2024 at 8:29pm

Well, it could be running rich.... float stuck or one lobe full of fuel, usually symptom is starts good and has blackish smoke. Oil smoke is blue.. due to rings or valvestem / valveguide wear. Diagnose and pull the manifold - you need gaskets anyway - look and see if valves are oily...

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When told "it's not the money,it's the principle", remember, it's always the money..

Posted By: jlogli
Date Posted: 25 Feb 2024 at 8:32pm

The carburetors been clean and put back together

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1945 WC on full steel, WD wide front, WD45 power steering, 1966 D-17IVfactory 3 point.1967 D-17IV SC. 1973 rotobaler white top. orange top roto, model 90 combine,82S, four bottom plow.302 baler.

Posted By: HudCo
Date Posted: 26 Feb 2024 at 9:28pm

i f that is a oilbath air cleaner make sure it isnt over full with water in the bottom

Posted By: DaveKamp
Date Posted: 29 Feb 2024 at 7:03am

Yeah, if it's leaking out between the manifold and the head, that's a good indication that the manifold-to-head fitment isn't tight enough to seal... so a significant leak.

A firm determination of what the leakage IS is necessary. Is it oil, fuel, condensation, or coolant? If oil, it wouldn't be from a valve stem, as it would have to go against the airflow path... Hud's onto the most likely source- the oil-bath air cleaner...

But the two things you must not do- first, don't predispose yourself to the two circumstances (running rough, and the leakage) being intimately related. It may by a shared symptom, but it may not... and second, don't assume that just because you've been through a component, that it is perfect.

In the case of the carbeurator, it is not uncommon for a float to go through a complete cleaning and reassembly, only to develop a leak after running a bit... in fact, it is quite common for a spot in the brass (typically down low) to become thinned out and pitted by electrolytic corrosion, but not enough to fail in testing, but after some running, give up and start leaking gasoline INTO the float... and eventually it's not a float anymore.

Pull off the oil bath, and see how it runs... if it doesn't change, drop the bowl WITHOUT draining it first... lift out the float and shake it... see if it's become fuel-logged.

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Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.

Posted By: DrAllis
Date Posted: 29 Feb 2024 at 7:25am

He claims it to be a series 4. They had a dry-type air cleaner/filter system unless someone has changed it.

Posted By: DaveKamp
Date Posted: 29 Feb 2024 at 10:05pm

Hmmm... good point....

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Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.

Posted By: WF owner
Date Posted: 01 Mar 2024 at 7:26am

I apologize for being completely off-topic here, but how did the newer replaceable dry air filters (like in the Series IV) compare to the older oil bath filters, like on the WD, B, C, etc.? I'm talking about actually cleaning the air for the engine.

Posted By: DrAllis
Date Posted: 01 Mar 2024 at 7:41am

They were 99+% efficient in their advertising and far better in the real world because no one ever serviced the oil bath types often enough.

Posted By: tbran
Date Posted: 01 Mar 2024 at 7:50am

Aw come on Doc - I never pulled the cup down on an oil bath cleaner and found 2" of mud in the bottom and oil sloshing out of the ring.... :-) We sold Long tractors and had one customer call up and tell us some idiot put oil in his air breather and wanted a new inner metal filter.

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When told "it's not the money,it's the principle", remember, it's always the money..

Posted By: AC7060IL
Date Posted: 01 Mar 2024 at 8:12am

“Oil substance” might be rich fuel dissolving old oil/carbon residues inside intake?? “Fixed stuck valve”, yeah probably means worn valve guides where condensation could corrode items together?
Keep looking. You’ll locate the source & then some.
Great tractors those D17s with their G226. Congratulations on having one of them, especially a Series IV.