[s-cars] Creeeeak, creeeeeak, creeeeeeak -Tired of those noisy
rear link joints?
kbattpo at verizon.net
Sun Apr 4 11:07:43 EDT 2004
Fred Munro wrote:
> Well, after 6 months one of my newly replaced rear upper link outer heim
> joints started singing that old familiar tune. My past approach was to stick
> a grease needle through the seal and pump it full of grease. This works, but
> eventually the seals are full of needle holes. This time I decided on a
> different approach.
> The ideal fix would be to drill the outer joint for a grease fitting, but
> there is not a lot of metal there and I've been kind of leery about drilling
> a hole large enough to take even a small grease fitting in case it weakened
> the joint. I took a micrometer to my grease needle and picked a drill 0.002"
> smaller (No.51 in my case). I drilled a hole through the top of the joint's
> outer housing and then drilled a larger hole just long enough to make a
> couple threads for a (very short) stainless 6-32 machine screw to seal the
> Inserted the needle, pumped grease until it came out of the seals, and
> inserted the sealing screw to keep the grease from coming back out of the
> hole. Ah, blessed silence. Wait, what's that pool of oil under the car -
> arghh, the left side diff seal is leaking.....
> Did discover a few things about these joints. The OEM joint has a heavy
> plastic insert between the inner bushing and the outer joint case. The
> cheaper aftermarket replacements I bought are metal on metal - no plastic
> insert. Maybe that's why they started squeaking in 6 months and it took the
> OEM joints 9 years. Maybe there is a reason the OEM joints are more
Fred, how deep was the metal cap of the join?
I have just done the same exact thing with the notoriously squeaky lower
control arms in my wife's A4. I used the M6x1mm, 90° grease fittings
from McMaster (1105K76). They come in a package of 10.
The cap thickness in one arm was 6.5mm, in the other was 7.5mm. The
grease fitting itself was 6.5mm long so in the first case I used a small
metal washer. I also put the Red Loctite on hate thread. It's the one
that is permanent.
So far so good. Sure beats replacing 4 lower arms at $300/ea and doing
the alignment after that.
FYI folks, Pep Boys sells the 90° grease fittings with the 0.25" thread.
I am not sure about the pitch, but given the choice I would recommend
the fine pitch.
I didn't buy those and bought the metric ones from McMaster instead
because I hardly have any non-metric tools in my garage, much less taps
two turbo quattros in the stable,
the third one is in the works
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