924Board.org

joecitizennn · Joined: 12 Sep 2005 Posts: 2096 Location: no mans land

The CV jounts in my 924S (87) softly howl when i coast. This does not happen in my 88 LeMans. You can also feel slight lateral play in the shafts. (my other porsches shafts are very solid even though it has twice the miles. I took the cv jjoints apart and cleande and repacked them. There were no cracks, galling or visible wear on the balls, and the race grooves were not wallowed. Shined, but not wallowed. After repack joints behave the same. What is going on here?

Paul · Posted: Sun Apr 15, 2007 3:37 am Post subject:

Lateral play is a must, or the axle would bend the first time you hit a bump (as the wheel moves up and down the length changes).

Rotational play is the sign of a bad CV joint.

Have you checked your tranny fluid level?
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

Smoothie · Posted: Sun Apr 15, 2007 4:54 am Post subject:

You mention both a chatter and a howl.. A chatter while coasting on a bumpy road can also be due to a broken or bent locating spring (aka- guide spring) on a rear brake caliper. A howl would be something else.
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Ozzie · Posted: Sun Apr 15, 2007 8:53 am Post subject:

I'd check the rear wheel bearings too if they haven't been done recently.
Noise travels and can lead to incorrect diagnosis.
I spent several days on another motor chasing noises. Turned out it was the harmonic balance on the crank after I had rebuilt the alt bearings, disconnected the air con, replaced the leaky PS pump and was looking evilly at the water pump when I checked the harmonic.
_________________
Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

scottc · Posted: Sun Apr 15, 2007 9:03 pm Post subject:

I spent 3 weekends trying to work out where the noise was coming from on the back of the wifes car. 3 different people agreed it was coming from the drivers side wheel, and was related to engine speed.

Turned out to be a broken mud flap on passenger side hitting the tyre.

Does the noise change when you go round corners? ie are left hand bends quiet butright hand bends just as loud?

joecitizennn · Joined: 12 Sep 2005 Posts: 2096 Location: no mans land

maybe discription was not good. The horizontal play in the shaft is good and normal. it slides back and forth. You are calling it (rotational) play, that is what I am experiencing to a slight degree. Is it normal to see a slight degree of this?