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Username Post: Distributor problem        (Topic#335696)
Pmullins61 
Forum Newbie
Posts: 39
Pmullins61
Loc: Frankfurt, Germany
Reg: 04-17-16
05-11-16 05:02 AM - Post#2627550    

Hi
I have the stock distributor with electronic ignition on my 216.
Seems I have a problem with timing slipping, the guy at the shop fixed this problem last time, looks like its moved again as the engine is now missing. Could I sort this problem if I purchase a new distributor, if so what is the recommended upgrade
Many thanks



 
raycow 
Honored Member
Posts: 26495
raycow
Loc: San Francisco, CA
Reg: 11-26-02
05-11-16 06:54 AM - Post#2627570    
    In response to Pmullins61

Don't be too quick to replace the distributor just because you can. Do some diagnostic work first. That's the mark of a mechanic.

A timing error won't usually cause the engine to miss. Does a timing light actually confirm that your timing has "slipped"? If yes, check the clamp which attaches the vacuum advance to the distributor body. I'm assuming you have already checked the hold-down screw which goes through the slotted hole in the "octane selector".

Ray

There's a line between good and evil no wider than a razor's edge - D.S. James Hathaway quoting from The Night Keeper


 
Pmullins61 
Forum Newbie
Posts: 39
Pmullins61
Loc: Frankfurt, Germany
Reg: 04-17-16
05-11-16 11:31 AM - Post#2627614    
    In response to raycow

Hi Ray
The last guy who corrected the problem said he needed to tighten as when he gave it some gas the timing slipped, he said it could happen again as the the location of the clamp was difficult to reach, I am ok with him been doing my cars for a while. This is the second time its happened, I thought to replace as maybe its worn.
Paul



 
Pmullins61 
Forum Newbie
Posts: 39
Pmullins61
Loc: Frankfurt, Germany
Reg: 04-17-16
05-11-16 02:25 PM - Post#2627654    
    In response to Pmullins61



Attachment: Distributor.jpg (361.41 KB) 51 View(s)






 
raycow 
Honored Member
Posts: 26495
raycow
Loc: San Francisco, CA
Reg: 11-26-02
05-12-16 10:14 AM - Post#2627830    
    In response to Pmullins61

I agree that the clamp screw is difficult to tighten because it is behind the distributor. Try removing the screw and re-installing it from the other side to see if this makes it any easier to reach for tightening. If you do this, make sure to catch the nut, which will fall off when you remove the screw. Another possibility would be to replace the screw with one that has a hex head so you can use a socket wrench on it. As long as you can get a matching nut for the new screw, I don't see any reason why you couldn't use a metric thread screw approximately 4 or 5 mm diameter.

The clamp is no longer available as a separate part, so if yours is damaged beyond salvage, you may need to replace the complete vacuum advance assembly. What year is your car? The vacuum advance was redesigned for 1952 to clear the side engine mounts first used that year. If you have a 51-earlier car, the 52-later type can still be used, but you may need to rework the vacuum line in order to connect it.

If the above is unclear, please feel free to ask for any explanation you may need.

Ray

There's a line between good and evil no wider than a razor's edge - D.S. James Hathaway quoting from The Night Keeper


 
Pmullins61 
Forum Newbie
Posts: 39
Pmullins61
Loc: Frankfurt, Germany
Reg: 04-17-16
05-12-16 01:55 PM - Post#2627881    
    In response to raycow

Ray
Appreciate the feedback,
The 216 is a 1950
During the winter upgrades I added the twin Carters, replacing the Rochester, electronic ignition amongst many others, however didn't change the distributor.
This is now the third time this has happened, last time we changed the fuel pump as well as resetting the timing, seems when you go flat to the floor with gas something happens with the timing.
With the HEI Distributor from Stovebolt, does this do away with the original Vacuum, I am enough dollar into this now the 200 for a new distributor will not break the bank.
Paul



 
raycow 
Honored Member
Posts: 26495
raycow
Loc: San Francisco, CA
Reg: 11-26-02
05-12-16 09:46 PM - Post#2627962    
    In response to Pmullins61

Langdon's distributor has the conventional type of vacuum advance which rotates only the breaker plate instead of the entire distributor body like the stock 216/235. It should solve your loose clamp problem, but this seems like the expensive way to fix it if you already have electronic ignition now.

Ray

There's a line between good and evil no wider than a razor's edge - D.S. James Hathaway quoting from The Night Keeper


 
Pmullins61 
Forum Newbie
Posts: 39
Pmullins61
Loc: Frankfurt, Germany
Reg: 04-17-16
05-21-16 09:58 AM - Post#2629668    
    In response to raycow

Ray
Fixed it today, was a combination of the bracket not tightened enough and one bad HT connection, so we are good thanks for the feedback
Paul



 
raycow 
Honored Member
Posts: 26495
raycow
Loc: San Francisco, CA
Reg: 11-26-02
05-21-16 09:40 PM - Post#2629756    
    In response to Pmullins61

Thank you for the feedback. I am very glad to hear that you were able to fix the problem without having to replace the distributor.

Ray

There's a line between good and evil no wider than a razor's edge - D.S. James Hathaway quoting from The Night Keeper


 
Ryan53 
Forum Newbie
Posts: 29

Loc: South Dakota
Reg: 07-15-16
08-28-17 06:57 AM - Post#2705841    
    In response to raycow

I am having this same issue with timing slipping, ever since I replaced the vacuum advance, am I just not getting the clamp tight enough?

1953 Chevy Belair 2dr sedan, 235 3speed 6volt


 
raycow 
Honored Member
Posts: 26495
raycow
Loc: San Francisco, CA
Reg: 11-26-02
08-28-17 01:35 PM - Post#2705901    
    In response to Ryan53

The clamp slipping is a problem I have never run into before seeing your post. It shouldn't need to be terribly tight because it doesn't take very much force to rotate the dist. You could check the dist for binding in the block, but that is another problem I have never personally had to deal with. Much more commonly, the dist is too loose in the block rather than too tight.

If you have difficulty getting a screwdriver on the screw head, you could try reversing it as I described in my earlier post.

Ray

There's a line between good and evil no wider than a razor's edge - D.S. James Hathaway quoting from The Night Keeper


 
Ryan53 
Forum Newbie
Posts: 29

Loc: South Dakota
Reg: 07-15-16
08-28-17 02:45 PM - Post#2705913    
    In response to raycow

I can't reverse it, rear facing is the easiest way to get at it. Today I replaced the flat head bolt with a hex head bolt and a small spacer sleeve to get it away from the clamp so I could tighten it easier. I'm using my inch pounds torq wrench to get consistency. Need to test drive it a couple more times and recheck timing.

1953 Chevy Belair 2dr sedan, 235 3speed 6volt


 
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