C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

wheel bearing help please

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Old May 15, 2014 | 10:52 PM
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Default wheel bearing help please

have not posted in quite a long time but just digging the vette out. Needs a wheel bearing (front left) Top photo is the one my car has second one is what i got from the parts store. The one on ecklers are the same as the second. what am i missing/not understanding??

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Old May 15, 2014 | 11:23 PM
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Originally Posted by Eangelo
what am i missing/not understanding??
You're good to go. I just replaced the front bearings on my 85 this week. Our early C4's did not have abs or traction control. The replacement front wheel bearngs all have the abs triggers on them whether we need them or not. It will fit in your spindle.

I don't know if it's a good or bad thing, but when I installed mine, I ran a small amount of RTV on the mounting surface that the housing mates up to the spindle to keep out moisture. I believe the C4's with ABS have an open back spindle, but ours are solid, and I think it would be better if water couldn't seep in behind the bearing.

Carl



Last edited by cohocarl; May 15, 2014 at 11:45 PM.
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Old May 16, 2014 | 05:18 AM
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Originally Posted by cohocarl
You're good to go. I just replaced the front bearings on my 85 this week. Our early C4's did not have abs or traction control. The replacement front wheel bearngs all have the abs triggers on them whether we need them or not. It will fit in your spindle.

I don't know if it's a good or bad thing, but when I installed mine, I ran a small amount of RTV on the mounting surface that the housing mates up to the spindle to keep out moisture. I believe the C4's with ABS have an open back spindle, but ours are solid, and I think it would be better if water couldn't seep in behind the bearing.

Carl


The '90 and earlier spindles aren't open on the back-side and the use of the RTV you mention I believe could/should be discouraged. The reluctor wheel and the hub/bearing is a sealed unit. If the "general" felt it required there would be procedures for it. I know of no hub bearing assemblies that are assembled to the spindle with gasket or RTV. If you insisted on using some then I believe you would only want it on the bore diameter but it's just not needed. I wouldn't make the RTV a "gasket" on the flange as the red squiggly hints.

Last edited by WVZR-1; May 16, 2014 at 05:25 AM.
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Old May 16, 2014 | 08:55 AM
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Originally Posted by cohocarl
You're good to go. I just replaced the front bearings on my 85 this week. Our early C4's did not have abs or traction control. The replacement front wheel bearngs all have the abs triggers on them whether we need them or not. It will fit in your spindle.

I don't know if it's a good or bad thing, but when I installed mine, I ran a small amount of RTV on the mounting surface that the housing mates up to the spindle to keep out moisture. I believe the C4's with ABS have an open back spindle, but ours are solid, and I think it would be better if water couldn't seep in behind the bearing.

Carl


The hub units on my '87 have a rubber o-ring that sits in a groove on the hub. That is supposed to keep moisture out. Not all the replacement hubs cone with a new o-ring so the old one should be transferred to the new before installing it.
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Old May 16, 2014 | 09:10 AM
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Originally Posted by WVZR-1
I wouldn't make the RTV a "gasket" on the flange as the red squiggly hints.
Thanks for your suggestion. My reasoning for doing so was the oem bearing on the rear is sealed off with the dust cap. The aftermarket ones have a rubber seal on the back side for the ABS wheel and would live in the closed back spindle. I realize 90 & above are open to the elements, but they would get a chance to dry off, where as if moisture got into the pocket of an 84-89's, over time would promote corrosion.
Just my thoughts, but I've been wrong before...
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Old May 16, 2014 | 09:33 AM
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Originally Posted by c4cruiser
The hub units on my '87 have a rubber o-ring that sits in a groove on the hub. That is supposed to keep moisture out. Not all the replacement hubs cone with a new o-ring so the old one should be transferred to the new before installing it.
The o-ring is present through '90 builds and isn't serviced any longer but a person could certainly do something. That is the vicinity that when I mentioned using RTV on the bore diameter I meant to use it and just not to be used on the flange as a "gasket maker"! I never measured the o-ring but it shouldn't be difficult to obtain a working substitute.

Originally Posted by cohocarl
I realize 90 & above are open to the elements, but they would get a chance to dry off, where as if moisture got into the pocket of an 84-89's, over time would promote corrosion.
'91 is the first year of the changed ABS incorporated in to the hub/bearing build.

Last edited by WVZR-1; May 16, 2014 at 09:36 AM.
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Old May 16, 2014 | 01:13 PM
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Originally Posted by cohocarl
The replacement front wheel bearngs all have the abs triggers on them whether we need them or not. It will fit in your spindle.
I'm amazed GM was able to keep the ABS bearing universal to the non ABS C4's. They must have had outside contract engineers working on that one...
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