Just waking up an old thread. I have a DS4 unit which has what seems to be excessive play in the shaft, is there any tips to rebuilding this unit? The points, rotor and cap are in good condition.

Just trying to eliminate erratic sparking. With the points set at 20thou I am getting inconsistent spark at each lead. Same occurs a with a smaller gap but not as frequent.

Might get 10 sparks in a row and then miss one as an example.

I have installed new coil, leads and an additional earth strap just in case it was a bad earth.

Location: Sunshine Coast Australia

Brian,
The rotor arm was new when I bought it many years ago but it was a very loose fit on the shaft even then so it always had the tape on it to take up the play.
Cheers,
Dave

Location: Sheffield

Just in from the shed and have two N.O.S. boxed (Remax)rotor arms for DS4 distributors.

Ruairidh, I have left a message on your email address as shown on your posts.
Dave, thanks for the info, I have probably been worrying needlessly and will try your tip.
Rob, your reply is excellent and provides numbers to look for at autojumbles.

Location: Near Jtn 28 On M1

Duncan,
It is very unusual for these to develop excessive wear. There is no reason why you can't bush the body if the wear is not on the spindle. It may be best to try and get another one to make a good one out of the two. I have about 6 on the shelf but they are a bit of a long way from you!
Take the whole thing apart and see what is warn. Then report back.

All the best

Tom

Location: Guildford

My DS4 has Triumph Spitfire rotor arm. It's a tight fit.
The invoice details from HISTORIC CAR PARTS were:
Rotor Arm for Triumph Spitfire 1300
1296 1969-74 Delco
Item Number 390358671828

It cost £7.79

Location: Melrose, Scottish Borders

Location: Near M1 Jtn 28

I found a cap to fit the DS4 CAV type distributor from small Ford Spares to fit a 1932 to 35 Ford (presumably Y type). Their code YE 12116 A. Fitted with Vauxhaul HA rotor arm and my chummy special is back on the road.

Location: N Ireland

Many thanks for the extra information Dermot,it may help others who have DS4s.
My present '31 Box has a DJ4 for which I had no problem obtaining parts for.

Location: Near M1 Jcn 28

Nicely found Dermot!

£16.42 here: https://www.smallfordspares.co.uk/products/ye-12116-a-distributor-cap-32-35





£7.72 here: http://www.ebay.co.uk/itm/Rotor-Arm-for-Vauxhall-Viva-HA-Series-Van-Delco-1975-82-/390349760840?_trksid=p2385738.m2548.l4275