RE: [DMCForum] Re: Shock/Suspension Kit
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RE: [DMCForum] Re: Shock/Suspension Kit



When I first put the PJ Grady shocks on the car, I noticed all the
squeaking
but assumed it was the bushings or maybe the way the fiberglass underbody
could shift on the frame.  A few weeks later I had one of the rear shocks
fail, so Rob sent me a replacement set.  Before I put them on, I decided
to
test them.  I put one end on the ground and leaned on the top with all my
weight.  As it compressed, it sounded a lot like a dog's chew toy giving a
loud squeak.  All 4 rear shocks that I had at the moment sounded the same
--
even the bad one.


I have replaced the shocks on my 4x4 truck and other cars and I have heard
this same thing.  Actually, I don't think I have ever heard of a quiet
shock.  I could always hear the fluid moving through the inside of the
shock.  On the 4x4, I found out it was possible to mount the shocks upside
down.   This produced a very loud squirting sound when the back of the
truck
was moved in any direction.  Later I realized what happened, turned them
over, and after a few cycles everything quieted down and was fine. These
shocks had typical rubber mounts. The urethane mounts on others created
even
more noise. I know you are a competent De Lorean mechanic so I don't know
what to tell you about the ones you have.


I've had other DeLorean owners ride with me, and they all
complain about the noise.  It's very distracting giving a continual
hamster
symphony while driving on most roads.


This is too funny.  I am adding this to my list.


You will probably see them on eBay soon after I
finish installing the sound proofing materials and the new black
carpeting.

If you think you hear noises now, just wait until you have the sound
deadening material installed.  Oh my.  In a previous email I told you
about
the sound system I built and how the vehicle was so sound proofed it made
my
ears hurt.  Have you ever been inside an anechoic chamber?


> Lubricating the shock bushings will probably get rid of that.

I tried that with my second set of PJ Grady rears.  I even lubricated the
rubber bushing that isolates the spring from the frame.  But I knew that
wasn't the problem the moment I put the car back down on the ground.  As
the
shocks compressed, I heard them squeak in stereo.  For anyone who doesn't
believe a shock could make so much noise, I just crab the car by the rear
wheel well and shake it.  The noise really surprises people.

As a side note, it's really rough driving with a bad shock.  Bumps that I
otherwise would never notice became severe.  And moderate bumps caused the
frame to scrape the road.

Walt


I would wonder about the bleed-off valve, for lack of a better term.  The
Rancho shocks on my 4x4 did the exact same thing when I dropped it from
the
jack and when I shook the truck from side to side.  I called Rancho and
they
explained how the internal system of the shock is designed to bleed excess
air to the top while it is in use.  This is when I found out the shock was
upside down.  When I changed them around the ride, noise, and handling was
completely different.  Hell, it even made my rear brakes function better.
Just because it's a 4x4 doesn't mean I drive slower ;)

I hope that helps in some way,

Greg


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