To Gasket Or Not To Gasket? -
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post #1 of 5 Old 07-31-2002, 05:04 PM Thread Starter
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To Gasket Or Not To Gasket?

Ok! I just got my alum. valve cover from Tellico. Haven't had a chance to put it on yet, BUT..... I was talking to a freind today who just happens to know one of the engineers who worked on the design of the good old 258. Ya know the one with the plastic valve cover that leaks oil. My freind was told by this guy that I should use a "RUBBER GASKET" when replacing the valve cover "plastic or metal" and that would solve my problem. Any thought's or idea's?

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post #2 of 5 Old 07-31-2002, 05:53 PM
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I think he's saying to go with rubber versus standard cork gaskets. I know you can get rubber seals for the oil pan, but I didn't realize they made them for the valve cover. I have always used Felpro cork gaskets, and I wind up replacing them about once every 50,000 miles--not too bad considering they're only about $8-9 each and take all of about 15 minutes to change.

It's also a good idea to re-torque the bolts after about a week or so.

Currently an '86 CJ-7 and a '77 CJ-7 Golden Eagle---#4 and 5 following a '01 Sahara, '90 Sahara, and '85 CJ-7....
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post #3 of 5 Old 07-31-2002, 06:33 PM
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On the 4.0L there isn't a gasket available, as far as I know, but even if there was I probably would just use gasket sealer and you are better off doing the same for your 258.

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1991 YJ Sahara 4.0L Automatic
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post #4 of 5 Old 08-01-2002, 06:48 AM
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There is a product that Napa or 1 stop sells called the right stuff it is awesome and can dam near seal anything it dries just like rubber, better then RTV sealant. Good luck

89 YJ with: 2.5 OME, SOA, MX-6 shocks, 33" ProComp MTs, AE. 589 rims, SYE + CV driveshaft, Homemade Bumper and nutter bypass. Also looking for some 44s to put under it.
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post #5 of 5 Old 08-01-2002, 12:50 PM
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I use Ultra Blue gasket sealer on a Felpro cork gasket. No leaks!

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4.2L, 3.5" Rough Country Suspension, Juice box, 31" BFG AT's, Posi-lok, trac-lok , sway bar dis-connects, no track bars, currently changing gears!
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