Bosch front plate with 009 distributor. New shaft and gears. It's doing the hula-hoop! I machined the groove to allow space for the lever at the top plus a little extra. So far have added a .005 shim around most of the base, leaving space to the retaining pin to work. Shes doing as someone suggested, the hula-hoop dance. I may not have gotten the plate as centered as it should be, but the instructions are kinda vague in that regards. Could be old wear at the top and/or where the shaft rides at the bottom. Any ideas or suggestions?
Also, seem to be loosing a lot of oil out the lower shaft hole esp with the hogs head oilier. Right now I have a cork in it. Do you guys put a plug there or?
Mark, thinking of putting a grass skirt on it!
To add: I did some checking today, the gear on the shaft is only coming in contact with the cam gear on it's lower half. Looks like at best I could move the gear down only approx 1/8" before it would bottom out on the casting. I could do one of two things, redrill the hole for the gear or machine off some of the distributor casting. Only problem is with machining is the pin part of the lock bolt would not engage the slot where the ring is currently.
I imagine the cork would get you by for a while... But there should be a ďcupĒ style plug installed in the bottom of the timing cover to seal below the distributor shaft.
As for the hula, Iíve encountered this before. It was a lower distributor shaft that was ordered from a major vendor, and was made incorrectly. The bore that attaches to the bottom of the VW distributor was machined at an angle relative to the centerline of the main shaft. It caused the distributor body to wobble as the as the shaft turned. If I remember correctly... I bored and sleeved the new lower shaft to correct the alignment issue and allow the 2 shafts to run concentrically. Been running ever since... with no hula
This is very interesting to me, as I am in the process of installing one of these from Chaffin. Hopefully I wonít have a problem!!
Ok, that is good info. I do see that were the VW shaft fits into the extension it's a bit on the loose side too. Guess I can take it to the machine shop we use, my chuck is off a couple of thousands and I don't have any way to grip it other wise.
I was thinking cup type plug but all I had was a cork on hand. There was noting in the hole when I got it. Hopefully I can work a plug in with out pulling it. I think I can pull the bolt and nut under it, get it started, reinstall the bolt and nut and use it for a pry point to work up and in.
An update; I did install the cup type plug a couple of weeks after this. Installed from under the car with a drift and worked out fine. The modern material cork I had used swelled up and was working great but I did not want to trust it. The distributor is still a little loose in the hole but has settled down and only rocks a little. Note to Les, this is an original front plate casting so the hole may be some what worn.
Hopefully Iíll get mine running soon. Thank you
After you install the extension shaft, make sure that it is running dead true at the gear end. If there is any runout, the distributor will wobble when installed. That extension is why I prefer early 4 cylinder Jeep distributors as a replacement- the shaft is long enough that you don't need to add an extension, but they are not a plentiful as the VW unit.
I like to turn a second groove above the locking bolt groove on the distributor body and put a big fat O-ring in that groove. It will stop blow bye from keeping the electricity from grounding. Also install a jumper wire to install a good ground as shown in the picture.
Thanks guys for the tips. At this point it is no longer a wobble, more just a small shudder. I did some work at the stub shaft cup, but for the life of me right now can not remember what we did. LOL
On an original front plate set-up, with this same problem, I machined down the post at the base of the distributor head and pressed a sleeve over it. Then machined the sleeve O.D. to a nice fit with the housing. (Also had the cut through the sleeve to expose the retaining groove again) I also made a retaining bolt with a spring loaded plunger in it to always maintain a good ground with the dist head.
Daní Comments about the Jeep distributors is interesting as I have something similar from a old Continental forklift engine. I will give it a careful look!!