Yes, as I say "... idle the engine ..."
PaulH.
-----Original Message-----
From: Hans Duinhoven <H.Duinhoven@simac.nl>
To: 'Paul Hunt' <paul.hunt1@virgin.net>; David Councill <dcouncil@imt.net>;
mgs@autox.team.net <mgs@autox.team.net>
Date: 20 October 1999 10:47
Subject: RE: Roller throw out bearing
>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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