 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / MINI / June 2004A little help please
Hi all i've been reading this newsgroup for about a week now and i need a little help with my 1975 998cc Leyland clubman panelvan. I just had the engine re-built to original specs except the 40thou over bore and valve seats to suit unleaded petrol. I had a rather fun time trying to start it the other day before it twigged that the rotor button was a full 180degrees out. I swapped the leads around and it started fine. Is this going to be a problem? i.e distributor advance ignition timing and all that, or should i get them to put the distributor drive gear in the right way? Was just wondering before i take it for a drive as i'm starting to really want to do. Thanks for any replies > Hi all i've been reading this newsgroup for about a week now and i need a > little help with my 1975 998cc Leyland clubman panelvan. [quoted text clipped - 6 lines] > just wondering before i take it for a drive as i'm starting to really want > to do. Ah hah! We see some version or another of this problem here every few months... You weren't 180 degrees out, you were either 160 degrees or 200 degrees out. The distributor is driven by a short shaft with a gear on the end which meshes with another gear on the camshaft in the depths of the motor. The gear on the short shaft has 9 teeth. That means there are 8 "wrong" ways to fit it. Think about what it means if it's wrong? The shaft is now, for example, 160 degrees rotated from where it should be. If you rotate the distributor 20 degrees, you can get the spark to happen a the right times, but the rotor button now points 180 degrees wrong. So you rearrange the leads, everything works fine and you think nothing more of it. Then the next owner comes along and tries to fit the spare dissy cap and leads off his spare mini.... And he posts another version of the same question here! The shaft is actually removable without dismantling the motor. It has a 5/16"UNF thread in a hole in the end. Thats the same size as about 80% of the bolts in a Mini. Remove the distributor and poke a long 5/16" bolt in the hole and screw it into the end of the shaft. Carefully pull the shaft out. It will twist as it's gear comes out of mesh with the gear on the camshaft. Note it's position as it comes free from the camshaft, so you can replace it the same, or rotate it the amount you want. One common reason people deliberately fit the distributor drive shaft rotated by one tooth is so that the vacuum advance unit on the distributor clears a T piece or bigger oil pressure sender fitted where the oil pressure warning light switch usually goes. The lesson from all this is simple - the shaft can be rotated, so never take it for granted that a distributor cap which works fine in one Mini will have the leads in the right order for another Mini. So there actually is no problem with it being out by 160 or 200 degrees other than if I decided to fit an aftermarket oil pressure sender. Good to know. I guess i can take her for a spin today and start running it in. > Ah hah! > > We see some version or another of this problem here every few months... I told my mate about it who has a 67 deluxe and he said every time he's put the drive gear back in its. been in the wrong way. > You weren't 180 degrees out, you were either 160 degrees or 200 degrees out. Didn't know that mutch about the mini distributor till then > The distributor is driven by a short shaft with a gear on the end which > meshes with another gear on the camshaft in the depths of the motor. [quoted text clipped - 20 lines] > gear on the camshaft. Note it's position as it comes free from the > camshaft, so you can replace it the same, or rotate it the amount you want. I've been told the long bolt for the rockers is a good one to use except i dont have a spare one > One common reason people deliberately fit the distributor drive shaft > rotated by one tooth is so that the vacuum advance unit on the [quoted text clipped - 4 lines] > take it for granted that a distributor cap which works fine in one Mini > will have the leads in the right order for another Mini. Hmm gotta love mini's don't ya? I blame my mate and the before mentioned 67 deluxe which has a fairly tweaked 1100cc and tuned to run on bp ultimate. he doesn't loose much ground at all on a warmed up 1275cc. I got the bug when we were chasing his mate up and down Dorrigo mountain Got another q for you do i need to change anything to run unleaded properly (i'm in Canberra aus) i.e re graph the distributor or re jet the carby? or will it be right in it's current tune? > So there actually is no problem with it being out by 160 or 200 degrees > other than if I decided to fit an aftermarket oil pressure sender. Good to > know. I guess i can take her for a spin today and start running it in. Really the only problem is that the plug lead order on your dissy cap is different to others. But given how many Minis have had the gear put in wrong and the lead order altered to suit, it's a miracle if you ever find two cars the same. Just check the lead order before using another cap and leads. |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2009 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.