W126 distributor cap, plug wires info - PeachParts Mercedes-Benz Forum

unkl300d · #1 03-02-2009, 01:51 PM

Hey thanks so far for the opinions.

I did use chevron techron fuel treatment recently.

I also observed the engine running in the dark in order to spot any insulation gaps (sparks) at the boot ends attached to plugs.
none.

What's the best tool/strategy for the lower hex bolt on the dist. cap?

THX

pawoSD · #2 03-02-2009, 03:04 PM

Quote:

Originally Posted by unkl300d

What's the best tool/strategy for the lower hex bolt on the dist. cap?

THX

An allen key? Thats what I used.

Did you pull and inspect the spark plugs? How old are they? Might have a dirty one (or more).

unkl300d · #3 03-02-2009, 03:10 PM

Hey thanks.

I plan to pull the plugs and dist cap to inspect.

You are right it may just be a plug. But the plug boots look like they need a gimmick to pull off w/o damaging them. I have a basic plug boot puller 'plier' cheapo but it really does not fit toward bottom for a good grip...

Dist cap: I did a dry run with a 5mm allen wrench but the lower hex nut is in a position where the allen wrench can not rest inside without the handle being avaivalble to torque it counterclockwise. It rest up onto the cap bottom or nothing.

slk230red · #4 03-02-2009, 03:54 PM

Quote:

Originally Posted by unkl300d

Hey thanks.

I plan to pull the plugs and dist cap to inspect.

You are right it may just be a plug. But the plug boots look like they need a gimmick to pull off w/o damaging them. I have a basic plug boot puller 'plier' cheapo but it really does not fit toward bottom for a good grip...

Dist cap: I did a dry run with a 5mm allen wrench but the lower hex nut is in a position where the allen wrench can not rest inside without the handle being avaivalble to torque it counterclockwise. It rest up onto the cap bottom or nothing.

To pull off the plug wires, I made a puller out of a wire coat hanger. I bent it into a U shape, then put a curl in the ends so I could reach end and put the curled ends on the metal tabs/ears and pull the connector off.

pawoSD · #5 03-02-2009, 06:35 PM

I use a craftsman "spark plug boot puller" $6 made in USA at your local sears.

Works fine, it grabs right above the metal part of the boot with two rubber fingers....doesn't damage it at all. I've pulled ours several times with it and it works great.

porkface · #6 03-02-2009, 07:27 PM

i forgot to mention the plugs. if they are platinum, they will cause the same problem, even after 5k or so. if you need plugs get bosch or ngk copper non-resistor plugs. the oe design plugs do MUCH better than the platinums sold as an "improvement". good luck, chuck.

unkl300d · #7 03-03-2009, 02:41 PM

Hey guys great ideas.

I will consider the tool options.

Also you all are right about platinum plugs. I've read how they are funky.

I need to figure out the botom dist cap hex nut access...