oil pan plug rubber washer

cxturboboost · **Posted:** Wed Jun 04, 2008 7:02 pm

Is the oil pan drain plug supposed to have a rubber washer on it from the factory?

Pete

JIMMY JEEP · **Posted:** Wed Jun 04, 2008 7:34 pm

Sump pan plugs usually have either a copper or plastic washer or ocassionally the fibre ones (like the ones supplied with fumoto valves) i personally have never seen a rubber one.

tjkj2002 · **Posted:** Wed Jun 04, 2008 7:39 pm

Not sure about the CRD KJ but almost all other Chrysler vehicles has a rubber washer on the plug(the gasser KJ does),and so does almost all GM vehicles.But like JIMMY JEEP said it could have a copper,fiber,or plastic washer also.

cxturboboost · **Posted:** Wed Jun 04, 2008 7:49 pm

Well,

I bought my Jeep used so I don't know what someone has done in the past, but mine has a regular hex bolt and a rubber washer. It's now dripping, so I don't know what to do? Maybe order the washer from mopar and buy a fumoto?

Pete

JIMMY JEEP · **Posted:** Wed Jun 04, 2008 7:49 pm

Sorry for wrong info and thanks tjkj2002 for putting it straight,i've never seen a rubber washer on any car in UK.

cxturboboost · **Posted:** Wed Jun 04, 2008 7:59 pm

Where is the best place to buy a Fumoto, I see that I will need to buy the "adapter" also from doing some reading. It looks like they already come with the seals needed. I tried calling Greg (Lubrication Specialists) but he is out until June 19th

Any suggestions?

tjkj2002 · **Posted:** Wed Jun 04, 2008 8:03 pm

cxturboboost wrote:

Well,

I bought my Jeep used so I don't know what someone has done in the past, but mine has a regular hex bolt and a rubber washer. It's now dripping, so I don't know what to do? Maybe order the washer from mopar and buy a fumoto?

Pete

Sounds like they messed up the OEM plug or the pan threads.The pic below is a pic of a GM oil drain plug but gives you a idea of what a oil pan drain plug should look like(or similiar),it should be a shouldered bolt style with a gasket made of rubber,cooper,plastic,or fiber.

This is the stlye of drain plug on my KJ.

Here is some other versions of oil drain plugs.

onthehunt · **Posted:** Wed Jun 04, 2008 8:26 pm

Old style pan plug is an 8mm allen plug witha copper washer. New style is a normal metric size hex plug with a copper washer. Not good for you, oil pan is easily damaged without washer and is not cheap or easy to replace. Hope you can repair it.

cxturboboost · **Posted:** Wed Jun 04, 2008 8:36 pm

Mine has a regular hex head bolt with washer, but then a real thick rubber washer. The threads feel good. I will order a new plug and washer tomorrow unless I can find a fumoto fast!

Pete

bugnout · **Posted:** Thu Jun 05, 2008 3:27 pm

The Stock CRD oil drain plug is a 3/8" BSP Parallel thread plug with a copper washer.

I ordered a replacement from http://www.discounthydraulichose.com Part number 9028-06 BSPP Countersunk Sealed Plug $4.18 each
This part has a rubber seal built in, I used it WITH the copper washer and have no leaks. I took the plug in to NAPA to get a copper washer.

cxturboboost · **Posted:** Thu Jun 05, 2008 3:40 pm

What is 3/8 bsp??? I don't understand the BSP part.

Pete

Nevermind--Brittish Standard Pipe... Got it.

Pete

cxturboboost · **Posted:** Thu Jun 05, 2008 3:49 pm

It doesn't measure anywhere close to 3/8 with my digital caliper???

Does anyone know for sure what size the plug is?

Pete

crd liberty · **Posted:** Thu Jun 05, 2008 4:31 pm

http://mdmetric.com/tech/thddat7.htm

Try this out for the size?

bugnout · **Posted:** Thu Jun 05, 2008 6:41 pm

cxturboboost wrote:

It doesn't measure anywhere close to 3/8 with my digital caliper???

Does anyone know for sure what size the plug is?

Pete

Ya that kind of through me as well. Close as I can tell the 3/8 rating is similiar to NPT fitting measurements, You've got 1/8, 1/4, 3/8, 1/2 3/4 standard NPT fitting sizes, but try measuring a 3/8 NPT male screw in fitting, certainly not 3/8. Don't know where they get that measurement from either, but we all accept that 3/8 is 3/8 right.

I ordered the part number above, and I've been alternating that plug with the stock plug on every oil change. Except for the rubber gasket it is pretty much identical.

cxturboboost · **Posted:** Thu Jun 05, 2008 6:48 pm

I think I'm going to drill and tap to 3/4 UNF and then put in a fumoto...

Pete

Goglio704 · **Posted:** Thu Jun 05, 2008 9:18 pm

When Greg started offering the Fumoto valves for the CRD, he had adapters made because he couldn't identify the thread. He now sells a valve that fits without the adapter. If your pan threads are still good, that would be the easy way out.

crd liberty · **Posted:** Fri Jun 06, 2008 5:36 am

cxturboboost wrote:

It doesn't measure anywhere close to 3/8 with my digital caliper???

Does anyone know for sure what size the plug is?

Pete

---------------------------

If you buy the Fumoto f-102 from Gregg, it will be a PF 3/8 thread.
Here is what gets confusing. PF is Japanese call out for the British standard.
Overall diameter from chart above is 16.662 mm, which measures about
5/8 inch, not 3/8.
Isn't it great to have all the different standards thru out the world?

Steve

Goglio704 · **Posted:** Fri Jun 06, 2008 8:57 am

British Pipe, like American, is called based on the nominal diameter of the inside of the pipe. Even that is subject to change within a size because of the different schedules (wall thickness) of pipe. Plenty of confusion to go around. No waiting.

cxturboboost · **Posted:** Fri Jun 06, 2008 6:57 pm

I put the metric plug back in with a new oil plug synthetic waher. It is now sealed with no leaks. Next oil change will be drill heli-coil and fumoto. Thanks for all the help.

Pete

oil pan plug rubber washer

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