Was changing out the fuel filter today on the dodge. The WIF sensor was a little loose, so you guessed it! SNAP!!

Cummins part store is closed today. I have to have the truck for work in the AM.

I found an old radiator petcock (plastic) that threaded in nicely, but it leaks under pressure (when running).

ANY IDEAS???? I don't even know the thread pitch or size. Was thinking maybe a bolt or oil drain plug (correct threads of course), just till I can get the part on my way home from work tommorrow. Thanks, Kevin

 

Take your old filter or if you have a extra new one and go to parts house or hardware store and find a plastic prefered or metal bolt,thread tape it and it will seal, when or if you find a plastic one buy a couple of extras as spares,when out on the road as they will break at the most inop time don't they?? Genos is a good source and price, Goodluck, Rick

 

Rick, thanks for the reply. That's exactly what I did. The plastic piece I had just didn't cut it. For some reason it would leak under pressure, and I don't think teflon tape is the answer. Especially with plastic.

I ended up going to the auto parts store with the housing and a 1/2"x20 tpi oil drain plug fit perfectly. Now we know what size it is. It has the wider flat head so the fibrous washer seated perfectly against the boss on the housing.

Now I feel better about it not coming apart or leaking, and I now have plenty of time to get one shipped from Genos. Thanks for the tip about that as well.

Drain plug was $2.50 and will stay in the glove box when the WIF sensor is replaced. Thanks again, Kevin

 

I have heard of alot of guys on the road, stop for fuel, drain the water separator and it break, I have had luck for a short while with the plastic bolt and tape, but I like the idea of the drain plug/seal alot better, I think I will get a couple of them drain plugs tommorow. So the threads matched up perfectly Huh?? Thanks for the Idea back at me. Rick

 

It matched like it was made for it. I picked up a few extra washers, some nylon, some fiber. The fiber washer seems to fit and work better (swells a little when moist from fuel).

Turns out the washer that came with the bolt was the best one. The others did not seem as snug on the bolt (the center hole of the washer was a little big on the others). I also put a little hylomar on the threads to act as a lube/sealant (hylomar does not set up or get rubbery, it stays like a sticky paste-great stuff for threads and as a gasket dressing).

BTW, the threaded portion of the bolt does not have to be that long. Get the one that is about 3/4's of an inch. No more than one inch. I also had a choice of the size of the bolt head. The size that seems perfect is the one that takes a 3/4 in wrench. While the next size up would have fit, it was a little tight at the drain lever housing.

I'm glad it turned out to be a simple fix. Thanks again, Kevin

 

Just a quick note, the oil drain plug likes to vibrate loose. I checked it after about 50 miles and it needed to be turned a little. No big leaks, truck ran fin, but a drip on the bottom of the housing. Probably should have used medium strength loc-tite or teflon tape. Seems to be holding fine after 2nd time tightening.
Kevin