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-   -   Compression leak around injector. Need copper washer source (http://www.cumminsforum.com/forum/89-93-powertrain/409074-compression-leak-around-injector-need-copper-washer-source.html)

jimlj 07-05-2011 08:06 PM

Compression leak around injector. Need copper washer source
 
ON my '89 Cummins, I have a leak around the #2 injector. Does anyone have the dimentions of the copper washer? I have a set from a Cummins kit, but I don't know if they are the right ones.

Where can I order just the washers from?

9297oldram 07-05-2011 08:11 PM

Did you try to tighten the hold down nut?

W350_1992 07-05-2011 09:08 PM

I'v gotten just the washers (and many of them) from local Cummins dealers. A piece of advice, stay away from the dodge dealer for that kind of stuff. It will be 3X what cummins will charge.

Art 07-05-2011 10:41 PM

I think the seal is Cummins part number 3900808 for the 9mm (non-IC) injectors. That one is 0.37-0.38 ID x 0.060 thick.

Do you have any pictures of your 79 F250 conversion? I am in the middle of a 79 F250 frame-up build / conversion right now:

1979 F250 Rebuild / Cummins conversion - Ford Truck Enthusiasts Forums

Art

jimlj 07-06-2011 09:25 AM

Quote:

Originally Posted by 9297oldram (Post 4238691)
Did you try to tighten the hold down nut?

Not yet, but I will before I pull the injector. Thanks for the tip.

strippedbolt 07-06-2011 02:34 PM

Just in case anyone is interested -
You can re-use copper washers a couple of times by "annealing" them. That is to re-soften them with heat.

All you do is put them on a peace of heavy wire (coat hanger) and heat them with a propane torch till they're red hot and let them cool. They will need to be cleaned as they will oxidize a bit, but I just clean them with a scotch brite like scrubber. :thumbsup:

Bad mouth me if you like - but this ol' tight wad knows it works !

jimlj 07-07-2011 09:03 AM

Quote:

Originally Posted by strippedbolt (Post 4240550)
Just in case anyone is interested -
You can re-use copper washers a couple of times by "annealing" them. That is to re-soften them with heat.

All you do is put them on a peace of heavy wire (coat hanger) and heat them with a propane torch till they're red hot and let them cool. They will need to be cleaned as they will oxidize a bit, but I just clean them with a scotch brite like scrubber. :thumbsup:

Bad mouth me if you like - but this ol' tight wad knows it works !

Good information to know if I can't find a washer by tomorrow. I live 100 miles from the closest Cummins dealer so running in and getting the part is not an option.

Greenleaf 07-08-2011 08:15 AM

The problem I have found with reuse is the fact thay squeeze and tighten themselves onto the tip to the point that removal is near impossible with out damage. They are really tight.

jimlj 07-11-2011 04:47 PM

It turns out I was worried over nothing. The nut holding down the injector was barely hand tight. I snugged it down and no more leak. I had built an injector puller, rounded up the parts and was prepared for the worse. It's not often things work out for me like that.

Thanks for all the input!

W350_1992 07-11-2011 06:44 PM

Glad thats all it was:thumbsup:. That hold down nut tightens to 44ft/lbs.:thumbsup:


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