Re: bearings and bouces

[cmice@mke.ab.com (Christopher Ice)]

>Oh - If Chris Ice is reading... how's the engine TAP TAP TAP noise?
>Another person asked me if the car was a diesel last weekend.  Grrr.
>The remodeling of the house we bought is taking up so much time I
>haven't even been able to change my oil on time, let alone remove
>the hydraulic pump (since I change at 3k intervals, another 1k
>isn't going to hurt much, don't worry.)

"Tap, Tap" is coming back...maybe I'll have a good chance at recording it
and we can put it on the Web Page!  ;-)  As a reminder to those who are new
or don't remember the thread, my 90Q makes a loud TAP TAP noise which is
not lifters, does not appear to be temperature related, and is definitely
speed related...noticable at idle not a cruise.  It's embarassing, as
people look at me as if the car is going to explode.  Turns out that the
vacuum pump fills with oil (either through worn push-rod, seals, ?) and the
pump will hydrostatically "lock" for just a moment.  When it releases, the
large return spring in the pump forces the push-rod onto the cam,
regardless of where the cam is in it's rotation, producing a loud TAP, TAP
noise until all is well again.

Anyway, I'm going to investigate a drain setup for the pump...it would
require drilling a hole in the housing, adding a fitting and a check valve
so the pump would drain back into the engine when the engine was off but
not "short out" the pump by venting to atmosphere.

Meanwhile, I will try and record it and plan to drain it again.  I think I
did the initial drain in October(?), so the fix is temporary to say the
least.

Chris

--
                                   --------
   +------------------------------| _   /| |------------------------------+
   | Chris Ice, Software Engineer | \`o_O' | Allen-Bradley Company        |
   | E-mail: CMIce@mke.AB.com     |   ( )  | 1201 S. Second St.           |
   | Voice:  414.382.2136         |    U   | Milwaukee, WI 53204 USA      |
   +------------------------------|  Ack!  |------------------------------+
       My opinions do not reflect  --------  the views of my employer.