6080 Leaking at injectors - is it valve cover gask
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=202557
Printed Date: 22 Sep 2024 at 5:31pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 6080 Leaking at injectors - is it valve cover gask
Posted By: 2MaineFarmers
Subject: 6080 Leaking at injectors - is it valve cover gask
Date Posted: 03 Aug 2024 at 11:00am
This looks like injector seals to me, but it is oil and in reading up on the forum it looks like there are no injector seals? Does that mean it has to be a valve cover gasket? If it was diesel I would say banjo bolts but it's black. The thing is, it leaks while SITTING. I turned the tractor off, cleaned with brake cleaner, and came back to the pictures this morning. It's leaking at three of the 4 injectors and doesn't seem to be leaking around the valve cover itself. |
Replies:
Posted By: 2MaineFarmers
Date Posted: 03 Aug 2024 at 11:02am
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Posted By: Lynn Marshall
Date Posted: 03 Aug 2024 at 12:48pm
| In my experience, it's always the valve cover gasket. The oil seeps around the injectors and takes a long time to ooze back out. The injectors on a 6080 seal in a copper tube in the head. If the injectors weren't sealing in the tube, you would have a compression leak around the injectors. I suppose that there's a chance that the injector nozzle isn't sealing with the rest of the injector body, but I've never seen that or even heard of it. Replace the valve cover gasket and either replace the exhaust manifold gaskets or at least tighten up the bolts. I think that your leak will eventually dry up after doing this. |
Posted By: 2MaineFarmers
Date Posted: 03 Aug 2024 at 8:07pm
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thank you sir! |
Posted By: Mikez
Date Posted: 04 Aug 2024 at 6:41am
| Pay attention when pulling valve cover bolt washers. It’s a stack of multiple concave washers. |
Posted By: DougG
Date Posted: 04 Aug 2024 at 7:56am
| In my experience , the valve cover bolts just loosen up ; retighten them and good to go , |
Posted By: AC720Man
Date Posted: 04 Aug 2024 at 10:51am
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Had the same issue on our 6060. Replaced the valve cover gasket and adjusted the valves while in there. Problem solved. ------------- 1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD |
Posted By: Lynn Marshall
Date Posted: 04 Aug 2024 at 10:56am
| The valve cover bolts shown in the picture were the latest design. The have a step, shoulder, that only let's the bolt go so tight. You tighten the bolts down completely until they stop and the little spring washers put a constant pressure on the gasket. Even if the gasket shrinks over time, the washers are still spring loaded and applying downward pressure. There should be 7 washers in each stack. |
Posted By: bigal121892
Date Posted: 04 Aug 2024 at 12:28pm
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Also, make sure the lip on the valve cover is straight. |