Issues with front crank seal. Input appreciated. - MR2 Owners Club Message Board
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post #1 of 4 (permalink) Old July 24th, 2019, 15:24 Thread Starter
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Issues with front crank seal. Input appreciated.

Hi guys. I farmed my T-belt job out to a mechanic because I don't have time to deal with it this summer, and one of the seals was leaking badly. As part of the job, he replaced all 3 seals under the timing cover.

Got the car back and it was still leaking. Brought it back in, and he just called to ask me to drop by this evening to talk options. He says the crankshaft has a groove in it and he doesn't know if he can find a redi sleeve for it.

Well, I already found the redi sleeve on Rockauto, so that's not a big deal, but my question is when I'm looking at it, what should I be looking for as far as crankshaft damage? I haven't dealt with crank seals before.

Extra info, when I got it back there was a new fairly loud whine that sounded like an alternator going bad, or a too-tight alternator belt. Pitch varied with engine speed. I checked, and the belt was properly tensioned, and it wasn't making that noise when I brought it in, so that makes me wonder if that sound could instead have been an improperly installed crank seal rubbing wrong on the crankshaft. If that's the case, could driving it roughly 75 miles with an improperly installed seal cause the groove? I wouldn't think so, but I've been wrong before.

Bottom line, if you guys were in my shoes, what would you be looking for and what would you expect when you walked into the shop tonight?

Thanks!
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post #2 of 4 (permalink) Old July 24th, 2019, 18:51
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Quote:
Originally Posted by shadowfax View Post
... that makes me wonder if that sound could instead have been an improperly installed crank seal rubbing wrong on the crankshaft. If that's the case, could driving it roughly 75 miles with an improperly installed seal cause the groove?
No, the groove comes from 100-200k miles of normal driving wear. The whine is probably because the worn crank has a nice new seal to rub on now.
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post #3 of 4 (permalink) Old July 25th, 2019, 17:32 Thread Starter
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Yeah, that's what I figured. Went and looked at the car. Groove isn't terrible, but I can see where it'd leak. Mechanic's gonna put a redi sleeve on it. I know that's not 100% ideal, but I'm not putting more money into a 5sfe than I have to. If and when the seal fails again, the engine's getting yanked and replaced.
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post #4 of 4 (permalink) Old July 31st, 2019, 19:01
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Redi-sleeves or seal savers are actually a very good solution to the rear crank shaft front seal, cam seal, etc. in addressing groves in the shaft from millions of miles because the sleeves are made of very hard stainless steel and can be replaced again and again without removal of the crankshaft or camshaft. I’ve used these on many different engines with good success (some manufacturers sell installation ‘cups’ which install the sleeves better than block of wood). So I wouldn’t fret it; should hold up longer than the crank. I have a 93 NA and have a set ready to go for my next timing belt change-I routinely replace the seals in doing this job and where sleeves haven’t been installed previously keep ones on hand ready to be installed.
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