LA engine, what size oil galley plug?

[MoparMike1974]

I need to replace the plug that goes under rear main cap. Does anyone know what size its supposed to be? I put one in the same size as the two in the front of the engine but it pretty much just fell in place like its slighly too small.

 

[fshd4it]

It's supposed to be a Dorman 555-008 plug, which they list as being 9/16" diameter by 1/4" tall.

 

[MoparMike1974]

Cool, I actually had a few of the dorman plugs with the correct part number. I got it in and it fit great. The first one I tried was a 19/32 which is 1/32 larger than the correct one. I guess that was enough to keep it from going to its home.

Another related question. Most plug kits come with the correct style cam plug and also a standard welch type plug. Can these be interchanged?

 

[fshd4it]

I've used/found both types in my engines without any problems. I run a bead of sealer around the outer edge of the welch plugs, not sure it's necessary tho.

 

[toolmanmike]

Cool, I actually had a few of the dorman plugs with the correct part number. I got it in and it fit great. The first one I tried was a 19/32 which is 1/32 larger than the correct one. I guess that was enough to keep it from going to its home.

Another related question. Most plug kits come with the correct style cam plug and also a standard welch type plug. Can these be interchanged?

It was always my thought that the Welch plug might go too far in and contact the cam. I don't know for sure though. I never measured. I just used the proper shallow plug. Silicone around the edge and expand it with a 1/2" drive extension and a hammer.

 

[B717]

Have any of you heard of one of these plugs coming off ? I ask because I started my car this morning backed out of garage and noticed two puddles of oil and two streaks following me out. When I parked and shut the car off oil just kept coming out.

thanks

 

[B717]

Motor is a 318