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Can you buy new heater taps for a W108

Posted: Sun 10 Dec, 2017 9:48 pm
by BensBenz
Hi All. Can you get or buy the heater taps for a W108? Mine have corroded badly and in fact the arm (what the cable connects to on the core) has corroded through. Oddly enough its never wet the carpet but Id say the o ring shave been weeping for many years and rusted the arms.

Re: Can you buy new heater taps for a W108

Posted: Mon 11 Dec, 2017 1:49 pm
by CraigB
Given (I think) the body of the tap is brass, I would just be looking for those top metal bits off a wreck - maybe has some willing to part with on here. Then just clean them up with new oring. From memory when you remove the screw and the arm and plate bit off the top, you just pull the brass inner part of the tap. Those top steel bits are not something that would wear.... just rust.. so should be as good as new.

Re: Can you buy new heater taps for a W108

Posted: Mon 11 Dec, 2017 7:10 pm
by BensBenz
Thanks!! Now to find a wreck hahaha. They are getting hard to come by these days which is both good and bad.

Re: Can you buy new heater taps for a W108

Posted: Mon 11 Dec, 2017 7:14 pm
by Bartman4800
The tap body is copper and integral with the heater core.
The tap bit that swivels (the plug) is brass.

The arm is steel

Use a long M4 bolt with a large washer and a piece of pipe (with a larger OD than the plug) to jack the plug out of the tap body.
Make sure you mark the position of the plug before you take it out.

Clean all with scotch brite cloth, and replace the O-rings with new ones in the size 13 x 1.
Install with a bit of petroleum jelly or O-ring grease.

If the arm is rusted, get one from a wreck (they are fixed with the M4 screw) or repair your own.
It is a simple piece of flat bar with a square hole in it

Installing the plug is a bit harder. It takes a bit of force to squeeze the O-ring in, but you are likely to push the plug too far after which you cut the O-ring in half....
Trick is to push the plug in with a large surface to bottom out on the tap body.

Bart