D4H 3204 O-Ring for injector connection

I'm still working on replacing the head gasket, everything looks pretty good in there. I would like to replace the orings on the fuel lines and the adapters. I think I found the part numbers to all of them except the connectors on the injectors. There is a short line coming off of the injector that connects to the 1W-0942: Valve Actuator on the inside of the valve cover. A few of the parts diagrams just error out on the Cat site, and the one for the injector does not show the line. I need to order these o-rings I will try to get some pics this afternoon.

Post the engine Serial Number please. EDIT: Or is the attached what you are looking for.? 8L-2779 O-Ring.

Nige said: Post the engine Serial Number please. EDIT: Or is the attached what you are looking for.? 8L-2779 O-Ring. Click to expand... I think 8L-2779 is the outside line. It looks different, but maybe just a different material.

Do you have a photo of the short line located between the adapter and the injector taken from further away.? Also an engine S/N might help in tracking down that line you are looking for, which ought to lead to a Part Number the for O-Ring seals for it.

The line he is talking about is part of the injector if you look at nut on line on injector side it takes a special tool to remove it

Nige said: Do you have a photo of the short line located between the adapter and the injector taken from further away.? Also an engine S/N might help in tracking down that line you are looking for, which ought to lead to a Part Number the for O-Ring seals for it. Click to expand... Sorry that is the only pic I have. Ill try to take a better one this afternoon, and I'll look for the engine SN.

pittsburgh cat man said: The line he is talking about is part of the injector if you look at nut on line on injector side it takes a special tool to remove it Click to expand... Yes, I didn't remove it from the injector, just the 1W-0942: Valve Actuator. If you look up the injector on the Cat site it doesn't have a breakdown of parts.

I think this illustration is what we are looking for. I assume the seal you are looking for is the one at the LH end of the Line As.?

Nige said: I think this illustration is what we are looking for. I assume the seal you are looking for is the one at the LH end of the Line As.? View attachment 364428 Click to expand... Yes, right here

Someone must know, but I’m afraid it’s not me.

I'm going to measure the ID and OD of the fittings on the outside vs inside, if they are the same I may just order the same for each.

Look at fuel lines look at lines one is listed with the line then look at the adapter the one you are looking for is listed there (4) 8l2779 (4) 1h1023

Make the first number 8L2779 small l causes problems

pittsburgh cat man said: Look at fuel lines look at lines one is listed with the line then look at the adapter the one you are looking for is listed there (4) 8l2779 (4) 1h1023 Click to expand... Good to hear. I measured the ends for the ID and the adapter for the OD, and they seemed to be the same. I ordered some 464-0509, that is what replaced the 8L2779. The 1H-1023 were still available so got them coming too. ​

just get a head gasket kit t wll everything you need