Navistar 6.0

[showcrop]

A shop replaced the oil pan on my F-350 6.0. I changed the oil a few days ago and found a rubber faced plug washer instead of the earlier copper crush washer. I assume that it would take significantly less torque. How much?

 

[Dieseltech]

If the OD is steel I'd use the same torque as before. The steel limits the crush, and the rubber does the sealing. I'd use a magnet and see if it's steel, lots of Denso injection pumps use that type to seal banjo fittings is where I see them most often.

 

[Mule Meat]

Two different types of drain plugs.

One has a groove milled into the underside of the head for an O ring to fit in. If you have this type. Only use a rubber O ring and change it with each oil change. Do not use a washer on this type of drain plug.

The other has a flat surface and uses a copper or aluminum washer. It can be either a crush washer or a simple flat one.

Both type torque to 18-20 ft lb.

You could install a Fumoto Valve like found on some CAT engines and not have to worry about drain plugs or the mess they can cause again.

 

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[Dieseltech]

Stop one turn before it breaks!!! LOL

 

[maqbill]

I can relate to that!

 

[MarkB_MI]

Is this like the GM drain plugs that have an o-ring embedded in the flange of the plug? The main thing is to get it tight enough that it won't come loose. I don't use a torque wrench but I get mine pretty tight. You can't really damage the o-ring by over-tightening the plug, but you do want to be able to get it back out at the next oil change without using a breaker bar.

 

[Mike(NEOhio)]

I had a '99 with the 5.4 bought used. Had the O-ring type plug. Each time I took it out it would turn easily for a few turns then get tight the rest of the way. Some PO had overtightened and pulled the threads a bit just under the head. Didn't bother the bushing in the par, new plug fixed it.

 

[showcrop]

I will try to make it clearer. It still has what I believe is the same plug or at least one that takes a copper crush washer so no groove for an O-ring, or an O-ring. It is the type of plug that takes a copper or aluminum crush washer, but instead of a crush washer, it has a steel washer that has rubber bonded to BOTH sides. The rubber is about 1/16 thick and the diameter of the rubber is about 1/4" less than the OD of the steel. It seems to me that with the rubber taking the full torque it would not take as much as a crush or aluminum washer.

 

[Mule Meat]

This type.
They are actually better than solid or crush washers. The rubber seals while the metal keeps the rubber from getting crushed or damaged.

Edited to add... I just pick a random model year to show.

 

[showcrop]

This type.
They are actually better than solid or crush washers. The rubber seals while the metal keeps the rubber from getting crushed or damaged.

View attachment 136379

View attachment 136386

Edited to add... I just pick a random model year to show.

THANK YOU!!!! I will check, but I'll bet that I got it pretty close because I went noticeably less than I would have with copper.