Yes, there are supposed to be washers, but what I found on my H4 rear carb
was that the dashpot threads were 'nearly' stripped. I replaced the dashpot
and the problem went away.
86 Audi 4kq
> Under the screw there is a non-metallic ring, which should
> prevent this.
> If the ring is not present it is obvious the plunger will come loose.
> If there are rings, these might turned to be too hard after
> all these years.
> Replacement won't be an exepensive trick, but will result
> into a proper carb
> '71 BGT
> -----Original Message-----
> From: David Councill [mailto:firstname.lastname@example.org]
> Sent: woensdag 26 april 2000 4:59
> To: Scott McKorkle; 'MG list (E-mail)'
> Subject: RE: more idiot questions - Loose plunger
> At 04:20 PM 4/25/00 -0700, Scott McKorkle wrote:
> >Now going off on a tangent and speaking of the carb
> plungers... The front
> >plunger on my HS-4 keeps unscrewing. I'll drive a few days
> and open the
> >bonnet to find it unscrewed but still in the carb. I'm assuming that
> >vibration from the engine is causing this. Any ideas to
> keep it in place?
> >I hate the thought of using loc-tite. Would teflon tape do
> the trick or
> >cause more problems? Finally, do you think this is
> indicative of any more
> >serious problems?
> >Scott McKorkle
> >1978 MGB (converted to dual SU's)
> My 67BGT had this unusual problem. After I bought it last
> year, I noticed
> that the damper rod (plunger) would come loose on the rear
> HS4 carb. Even
> after I tightened it as tight as I could get it, it still
> came unscrewed
> within 5-10 miles of city driving.
> I almost wrote in to the list to see if anyone had heard of
> this problem.
> But I thought one possibility was the damper rod itself was no longer
> straight, adding to the vibrations that were then unscrewing
> it. To test
> this theory, I just swapped the dampers between my two BGTs.
> Well, a test
> drive later, and the damper rod came unscrewed on my 71BGT.
> The solution was to replace the damper rods - they were not overly
> expensive, I think about $7-8 each. Its worth a try.
> 67 BGT
> 71 BGT