2nd Generation Specific 1986-1992 Discussion

leaky oil bypass valve

Old 11-27-2005, 05:28 PM
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My dad's '88 vert had an oil leak at the oil bypass valve. I removed it, tested the valve just for kicks (149*F, 5mm), and it worked fine. The washer didn't look right, so I replaced the washer and bolt from the one from my parts car, which had a washer that fit properly. Started it up, and it still leaked. So bad that you can wipe it off, and watch a drip form within 15 seconds. Should I just try a brand new washer? What else can we try?



Anyone know the torque value of the big bolt?
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Old 11-27-2005, 06:11 PM
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I just thought of this, could the oil cooler have a crack in it, like from over-tightening the bolt?
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Old 11-27-2005, 06:24 PM
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Originally Posted by Baldy' post='781802' date='Nov 27 2005, 04:11 PM

I just thought of this, could the oil cooler have a crack in it, like from over-tightening the bolt?


it might. try a new washer first
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Old 11-27-2005, 10:13 PM
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Like j9 said try a new washer. Obviously make sure everything is clean and apply a fine layer of silicone to both sides of the crush washer before you bolt it together.



If it still leaks it's most likely cracked. It can and does happen.
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Old 11-29-2005, 07:26 AM
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It's cracked. My dad said he put JB weld on it (yuck), if it still leaks he'll get it welded, I also have a spare oil cooler we could try.
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Old 11-29-2005, 11:14 AM
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Originally Posted by Baldy' post='782242' date='Nov 29 2005, 05:26 AM

It's cracked. My dad said he put JB weld on it (yuck), if it still leaks he'll get it welded, I also have a spare oil cooler we could try.


welding works and its cheap
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Old 11-30-2005, 05:17 PM
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Welding works, but you need to have the weldor preheat to remove the embedded oil. Make sure he knows its an OIL cooler. If he charges more than $50 buy another used cooler
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Old 11-30-2005, 05:20 PM
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Originally Posted by banzaitoyota' post='782676' date='Nov 30 2005, 03:17 PM

Welding works, but you need to have the weldor preheat to remove the embedded oil. Make sure he knows its an OIL cooler. If he charges more than $50 buy another used cooler


yep. usually welding is like $20-$30
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Old 12-01-2005, 08:02 AM
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We're gonna slap the used one on from my parts car. Should I bother trying to clean it out or anything? Or is that useless unless I pay a pro to do it?
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Old 12-03-2005, 02:18 PM
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Anyone know the torque values for tightening the cooler lines on the cooler? I couldn't find it in Haynes or the FSM online.
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