‘67 front inner bearing seal... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**jabborabbo** · 01-09-2021, 07:06 PM

Does it end up flush with the hub or about 1/10 inch high? I’ve searched the threads and get conflicting answers. I thought it was flush, but ending up boogering the seal trying to get it flush. I’ve measured the seal and inner race height and both are the same as the old ones.

Thanks!

**HO455** · 01-09-2021, 10:06 PM

It is possible that your replacement seal is slightly over sized and/or the bore it fits in is slightly under sized. Thus when the outer part of the seal (which is harder to compress) gets into the bore it won't go any further in. That old engineering bugaboo "Tolerance Stacking"
If it isn't rubbing anything and the lip is on a nice smooth part of the spindle you should be okay to run it protruding.
If you need to get it in further try starting over, but put the seal in the freezer for 30 minutes before starting and preheat the hub to around 175 to 200 degrees. Then try installing the seal. You have to be quick. The temperature difference will give you a couple thousandths more clearance.
Good luck.

**Steeveedee** · 01-09-2021, 10:14 PM

I've installed literally hundreds of wheel bearing seals (and bent many). Some stick out, some don't. You have to look at them carefully. It does take some practice to tell when they've bottomed out.

**jabborabbo** · 01-10-2021, 07:06 PM

I miked the distance from the bearing race to the top of the hub - 0.33 in. Seal thickness - 0.5 in. I also had previously tapped the race out a bit, sprayed some brake cleaner between the race and the stops in the hub, blew it out with compressed air, then tapped the race back against the stops before I took the measurements.

01-09-2021, 07:06 PM	#1
jabborabbo Senior Member Join Date: Apr 2013 Location: Podunk, Texas Posts: 739	‘67 front inner bearing seal... Does it end up flush with the hub or about 1/10 inch high? I’ve searched the threads and get conflicting answers. I thought it was flush, but ending up boogering the seal trying to get it flush. I’ve measured the seal and inner race height and both are the same as the old ones. Thanks! __________________ "It is hard to search for a black cat in a dark room, particularly if it is not there. Especially if this cat is smart, brave, and polite." Sergei Shoigu, Russian Minister of Defense

01-09-2021, 10:06 PM	#2
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 10,811	Re: ‘67 front inner bearing seal... It is possible that your replacement seal is slightly over sized and/or the bore it fits in is slightly under sized. Thus when the outer part of the seal (which is harder to compress) gets into the bore it won't go any further in. That old engineering bugaboo "Tolerance Stacking" If it isn't rubbing anything and the lip is on a nice smooth part of the spindle you should be okay to run it protruding. If you need to get it in further try starting over, but put the seal in the freezer for 30 minutes before starting and preheat the hub to around 175 to 200 degrees. Then try installing the seal. You have to be quick. The temperature difference will give you a couple thousandths more clearance. Good luck. __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

01-09-2021, 10:14 PM	#3
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,094	Re: ‘67 front inner bearing seal... I've installed literally hundreds of wheel bearing seals (and bent many). Some stick out, some don't. You have to look at them carefully. It does take some practice to tell when they've bottomed out. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

01-10-2021, 07:06 PM	#4
jabborabbo Senior Member Join Date: Apr 2013 Location: Podunk, Texas Posts: 739	Re: ‘67 front inner bearing seal... I miked the distance from the bearing race to the top of the hub - 0.33 in. Seal thickness - 0.5 in. I also had previously tapped the race out a bit, sprayed some brake cleaner between the race and the stops in the hub, blew it out with compressed air, then tapped the race back against the stops before I took the measurements. __________________ "It is hard to search for a black cat in a dark room, particularly if it is not there. Especially if this cat is smart, brave, and polite." Sergei Shoigu, Russian Minister of Defense



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