340 Oil Filler Cap Question

[Doug M.]

Quick question, which is probably stupid, but here goes. It is possible to change the gasket on a MOPAR/340 ('72) oil filler cap? Mine is original (see pics), and it's leaking. I see that AMD is making reproduction caps, but since my car is a survivor, I'd like to avoid replacing the original cap if possible. Any info you can provide will be greatly appreciated.

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[Newbomb Turk]

Yes. But I’ve never found a replacement gasket so I had to make them.

If you can find a replacement gasket that’s all the easier.

 

[Oldmanmopar]

Take one off of the new cap.

 

[Syleng1]

Honestly a “survivor” car it is fully acceptable to replace tune up parts and filters and anything else for that matter but keep the original stuff. Replacement parts to make it safe is way better than not replacing, having a leak- then a fire.
Just hold on to what ever you remove.

So many people get hung up on “original.” Who the heck wants a 60-70 year old filter on the engine? That can cause more damage than the value Of a swapped part to keep it fresh and running properly.
Syleng1

 

[abodyjoe]

So many people get hung up on “original.” Who the heck wants a 60-70 year old filter on the engine? That can cause more damage than the value Of a swapped part to keep it fresh and running properly.

he is talkling about the oil FILL cap. not a filter.

 

[Syleng1]

he is talkling about the oil FILL cap. not a filter.

Read my post. I fully am aware.
This whole “original” or “survivor” is foolish to keep bad parts for what?

 

[Doug M.]

Yes. But I’ve never found a replacement gasket so I had to make them.

If you can find a replacement gasket that’s all the easier.

Thanks much. Haven't been able to find a gasket either. Thanks again.

 

[Doug M.]

Take one off of the new cap.

Yup, good call. Thanks.

 

[Doug M.]

Honestly a “survivor” car it is fully acceptable to replace tune up parts and filters and anything else for that matter but keep the original stuff. Replacement parts to make it safe is way better than not replacing, having a leak- then a fire.
Just hold on to what ever you remove.

So many people get hung up on “original.” Who the heck wants a 60-70 year old filter on the engine? That can cause more damage than the value Of a swapped part to keep it fresh and running properly.
Syleng1

Honestly a “survivor” car it is fully acceptable to replace tune up parts and filters and anything else for that matter but keep the original stuff. Replacement parts to make it safe is way better than not replacing, having a leak- then a fire.
Just hold on to what ever you remove.

So many people get hung up on “original.” Who the heck wants a 60-70 year old filter on the engine? That can cause more damage than the value Of a swapped part to keep it fresh and running properly.
Syleng1

Agreed. Have lots of parts (hoses, plug wires, etc. in boxes) my wife loves. them. Thanks for the response.

 

[Michael Siple]

I've cut the palm out of a dirty leather work glove & stretched it over to fit - it helps. Rocker squirts oil right onto inside of cap & it needs a little wipe once in awhile.

 

[Oldmanmopar]

After 50 years of taking it off and on , The valve cover and the cap wear. Some times you need to double the the gasket up.

 

[abodyjoe]

Take one off of the new cap.

was just out in the garage. i have two new looking caps and both missing the gasket.. lol .. guess i needed them for a painted cap.

 

[Dan the man]

Myself, I wouldn't worry about the oil filler cap not being original. You can buy a new cap take off the rubber seal and put it on the original cap. Some things can't stay original, water pump, fuel pump etc. I wouldn't worry about it.

 

[Doug M.]

Gents: Thanks for all the information and advice, I really appreciate it. That's what makes this forum so damn good. Thanks again! Doug