Should this test be performed with a running engine?
Cheers,
Hans
'71 BGT
> -----Original Message-----
> From: Paul Hunt [SMTP:paul.hunt1@virgin.net]
> Sent: Wednesday, October 20, 1999 11:19 AM
> To: David Councill; mgs@autox.team.net
> Subject: Re: Roller throw out bearing
>
> I think the real reason has got lost in all this, erm, discussion about
> roller (spit!) bearings. The cause of the idle drop is probably worn
> crankshaft thrust washers. If you idle the engine and have your assistant
> push the clutch up and down, and if you look at the crankshaft pulley and
> see it moving back and fore, then it would tend to be confirmed.
>
> PaulH.
>
> -----Original Message-----
> From: David Councill <dcouncil@imt.net>
> To: mgs@autox.team.net <mgs@autox.team.net>
> Date: 20 October 1999 03:21
> Subject: Re: Roller throw out bearing
>
>
> >This thread has gone on for a day or two and I have followed with
> interest.
> >Several people have said that a rpm drop is normal when the clutch is
> >depressed. Maybe so but I have some doubts.
> >
> >I noticed this same symtom with my 67 BGT - it typically drops about 200
> >rpm with the clutch depressed. No major deal because I run my idle at
> 1000
> >rpm where it is smooth. So a drop to 800 is only a curiosity.
> >
> >However, my 71 BGT has not shown this problem that I recall. I have owned
> >and driven it for 16 years now. So when I bought the 67 last March, I
> >thought the rpm drop signified something. Maybe not?
> >
> >And I don't know about roller throw out bearings. I replaced the throw
> out
> >bearing on the 71 with a standard bearing about two years ago. The 67 is
> >using whatever was put in it in the late 80's - the car had been idled
> >since '92 and an oil change sticker indicated it was driven about 2000
> >miles between 1987-1992. I've put on about 700 miles on the 67 BGT since
> I
> >got it and it is running quite well to this point - except for the rpm
> drop
> >and a slight metallic ping which indicates that I should replace the
> >u-joints, probably this weekend.
> >
> >So any other thoughts on the normalcy of the rpm drop? For now, I'll just
> >figure it is normal.
> >
> >
> >David
> >
> >
> >
> >>
> >>
> >>I thing what we are talking about here is that there wasn't a switch to
> >>lower idle (at least to my knowledge) and a worn throw out bearing may
> be
> >>causing this problem. Am I following this correctly?
> >>
> >>
> >>Tab, seems to me that somewhere along the line I heard that
> >>you should expect about 200 rpm drop with the clutch in.
> >>
> >>
> >>Larry Hoy
> >
> >
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