Jump to content

Vacuum advance


peterd

Recommended Posts

Members dont see this ad
2 hours ago, altezzaclub said:

Can you turn the base-plate by hand??

If it doesn't move around freely & smoothly take it out and lube the rusty ball bearings it sits on.

Unless the vac diaphram has really died...

I know with mine I could tell the plate mechanism was seized by feeling it, but sucking on the diaphragm it was clear it wasn't punctured because it was like sucking on a blocked straw, i.e. no air getting through. 

Seems like the previous owner had gone 20 years without oiling the vacuum or mechanical advance mechanisms--I bet that would be common, being hidden under the points, etc.! A couple of drops of oil and some wiggling back and forth and they were perfect again

Link to comment
Share on other sites

I had a play and it's definatley not working so I swapped it with a ratty one from another distributor I have. Also doesn't work. I've been giving the engine a birthday to try and get rid of the vacuum leaks. It seems to be never ending. Redid the manifold gasket, big improvement. Replaced the vacuum hoses, huge improvement. Almost there but still not happy which is why I was looking at the vacuum advance. 

Is it possible to buy a new vacuum advance without buying a new distributor, or can they be repaired?

Thanks 

 

Link to comment
Share on other sites

So, if you suck on just the diaphram units neither of them move the arm in??  Do they leak air through into your mouth?

Does the base plate turn easily with your thumb?

They are swaged over so wouldn't be repairable, but I expect you can by a new one from some distributor tuning specialist.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...