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post #31 of 53 (permalink) Old 08-27-2005, 03:25 PM Thread Starter
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RE: 114 Carbs.

I was looking at the distributor some more and it looks really worn on the cam where it contacts the points, more so than would probably be normal. I looked around for new distributors and the cheapest one I could find was $482 anywhere else I should look? I think before I purchase the webers I will go for a new distributor because that could be the whole problem. Any thoughts? Also how hard is it to remove and put in a new distributor?
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post #32 of 53 (permalink) Old 08-28-2005, 06:04 PM
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RE: 114 Carbs.

The cam was well worn in my distributor and I could never get it to run good at all. I put in a Crane XR700 electronic unit and it was the best single improvement Of all the things I've done. A slotted pick up wheel attaches to the cam and as it goes around an LED flashes through the slots. You will never have to set points again.Nothing touches the cam except the wheel that is attached to it. worn cam is no problem. I've heared that pertronix ignition is good too and supposedly simple but I went with the crane. The complete Kit with New coil and resistor cost me about $ 150. Your car is different than mine. Mine older and simpler. Get advice from people who have put them in a car like yours. but I highly recomend it.

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post #33 of 53 (permalink) Old 08-28-2005, 06:18 PM
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RE: 114 Carbs.

forgot to mention that befor I put in the xr700 I had allready bought a rebuild kit and rebuilt the whole distributor except the shaft bushing was still good so I didn't replace that, One of my weights was disconnected and just flopping around in there, but the rebuild didn't do anything to help the dist cam and that I felt was the biggest problem. You can take it apart and check the weights and see that they are connected and moving good but be a little carefull of the thin black phenolic sheet that they slide on it crumbles real easy and i had to replace mine with just some thin plastic. There is a really great web site with pictures of a complete rebuild. I will find it and post it for you.

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post #34 of 53 (permalink) Old 08-28-2005, 06:23 PM
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RE: 114 Carbs.

Here it is , Great site. http://www.glenn-ring.com/010/

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post #35 of 53 (permalink) Old 08-29-2005, 10:50 AM
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RE: 114 Carbs.

did you short out the switch taht comes out of the thermostat housing to see if teh advance kicks in?

If it does not then your engine will always be on retard. NO power, backfiring ...

That's what was wrong with mine. 34 year old emissions systems tend to seize once and a while.
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post #36 of 53 (permalink) Old 08-29-2005, 10:58 AM
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RE: 114 Carbs.

Quote:
MB250 - 8/27/2005 3:09 PM

Somebody said that it could be worn or broken mechanical advance weight springs in the distributor.
If I am not mistaken, there are 2 vacuum lines that connect to your distributor. It's not a mechanical advance.

Open the top of the dist, and attach a vaccum hose to each of the ports. 1 at a time.

Apply vacuum. You should see the advance/retard.

personally, I still think your emmission controls are broken.

The way MB got around US emmissions was to retard the engine at idle, no advance in midrange and full advance at top range.

If your emission solenoids broke, then the retard vacuum line will always be "on"
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post #37 of 53 (permalink) Old 08-30-2005, 11:51 AM Thread Starter
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RE: 114 Carbs.

I did short the switch that comes off the thermostat housing and it didn't make much of a difference. I also disconnected the vacuum hoses as you mentioned and that didn't make any difference which is what makes me think the springs in the distributor are broken. I plan on getting into the distributor but am afraid I might mess up the springs and not get them back on as that's what happend on our '78 MGB and, Also when I was looking at the distributor I noticed the screw that holds the whole thing down was loose so I tightend it up would that have messed anything up over time? How hard is the distributor to take apart to check the weights?
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post #38 of 53 (permalink) Old 08-30-2005, 12:19 PM Thread Starter
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RE: 114 Carbs.

Thanks for the link Pm220b, I'll check it out
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post #39 of 53 (permalink) Old 08-30-2005, 05:08 PM Thread Starter
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RE: 114 Carbs.

Ok, so I started taking my distributor apart, I've got it pretty much apart but I can't seem to get the pin out of the bottom so that I can take the cam out, I've hammered at it very gently and with a lot of force but it just won't go. Anybody have a trick for doing this?
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post #40 of 53 (permalink) Old 08-30-2005, 05:57 PM
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RE: 114 Carbs.

If you have a vise put the flat tabs in the vise with the distributor sticking upright and use a nail (or other pin) just a hair smaller than the pin that is in there and hammer the nail to drive it out. If it wont go driving from one side try driving it out from the othet side. I assume you have removed the circular spring that covers the pin to keep it in place. If you don't have a vise just find something solid to lay the shaft on and use a nail to drive it out. You can't hurt it so dont be afraid to whack it. maybe a little penetrating oil before you do. As I recall if you just want to check the weights you can take the points plate off and check from the top. You probably know that i threw it in just in case. I rebuilt two of them hoping to use the one with best cam but tried them both and put in the crane xr 700.
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