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Re: Sudden knocking sound from engine. Any ideas?

To: <mgs@autox.team.net>
Subject: Re: Sudden knocking sound from engine. Any ideas?
From: "René C.M. van Maanen" <cmvanmaanen@hetnet.nl>
Date: Sun, 18 Mar 2001 10:19:45 +0100
~Yesterday my uncle, who is longly retired, visited me. He used to work on
FIATs back in the 50's and 60's.

I described him my probelem, he immediately told me that I had a worn
bearing, and when I showed him the old one, he told me that this was
definetely the problem.
Next he asked me how my oilpump was. After I told him that I had also
ordered this one, I showed him the on that came of the car. He told me that
is was no luxury to replace it.

I am more into old Honda's, but I am happy that, with the lists help, I had
drawn the right conclusion and ordered the right parts.

Thanks all!

Reni van Maanen
My NOS parts for sale:
http://www.homepages.hetnet.nl/~honda-sohc4/rene/nosparts.htm
~~~~~~~~~~~~~~~~~~~~
----- Original Message -----
From: "Reni C.M. van Maanen" <cmvanmaanen@hetnet.nl>
To: <mgs@autox.team.net>
Cc: "Rene van Maanen" <cmvanmaanen@hetnet.nl>
Sent: Thursday, March 15, 2001 12:18 PM
Subject: Sudden knocking sound from engine. Any ideas?


> My 68 GT, which has the "bad type" of oil filter, suddenly
has developed a
> knocking sound in the engine. I used a garden hose to
listen where the sound
> comes from, but I cannot really hear wherefrom. Sounds
like the bottom of
> the fourth cylinder, but I am not sure. One of the
charactaristics of the
> sound is that it is not there when running stationary, but
only when I
> increase revs. When revs are up, and stable, all is OK
again.
>
> I have removed the bigend bearings, and showed them to the
MG parts shop.
> Allthough one of the bearings (yes, number 4) shows copper
colour, the
> dealer says that this could not be the problem. I should
check main
> bearings.
>
> So I went home and removed the middle lower main bearings.
No wear at all.
>
> Next the oilpump. When removing the two rotors from the
housing, there is
> more wear than allowed. But when it is in, there is hardly
any wear. I must
> say that the surface of the inner rotor looks like it has
transprted some
> metal practicals, though.
>
> Now my questions are:
>
> How big is the chance that the pump is shot? I really
would like to be a bit
> sure, before I throw in big $$$.
> Are there any other ideas of things that could be wrong?

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