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Registered
Join Date: Sep 2010
Location: USA
Posts: 43
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Loctite on valve cover gaskets?
Hey guys.
We just finished the 2k mile head bolt and valve adjustment, and are ready to bolt the covers back on. I know the last time that the engine was rebuilt, loctite was applied to some various components. The valve cover gaskets that we took off did not have loctite applied. I was just curious if it would be beneficial to apply loctite to the gaskets prior to the final sealing. The car already has the bottom Turbo valve covers update, fyi. |
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RETIRED
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Loctite is for nuts and bolts. Do you mean gasket sealant? If so, there are a few threads on the proper gasket that is put on dry and then properly torqued, the right sequence.
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1983/3.6, backdate to long hood 2012 ML350 3.0 Turbo Diesel |
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Registered
Join Date: Sep 2010
Location: USA
Posts: 43
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,470
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no sealer! you'll be sorry next time they're removed and you have to scrape all that crap off. surface the covers on a large belt sander and that's all you need.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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muck-raker
Join Date: Jan 2009
Location: Coastal PNW
Posts: 3,059
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+1, what John Walker says. Also, if you use the right equipment (i.e., the black gaskets with the sealant lips along with the nylock nuts and aluminum washers) you should have zero problems. The valve gasket kit sold by our host is highly recommended.
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STONE '88 Cabriolet, using EP Slick 20w50 partial synthetic Snake Oil...just as Rommel intended. ![]() Deny Everything; Admit Nothing; and Always Make Counter-accusations ![]() |
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Somatic Negative Optimist
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To prevent valve covers from leaking, clean the mating surface really well and check the covers for warp by placing a sheet of ~250 grit sandpaper on a plate of glass and slide the covers over. That removes the high-spots.
Before installing the covers, I smear Moly lube on both sides of the gaskets so they'll never stick again. (An old Industrial trick) Have used the same paper gaskets for years, no leaks and the covers come off easy each time without destroying the gaskets. ![]() |
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Registered
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I dont know which valve cover gaskets you're using, but there are some available that have a silicone bead for sealing properties. These gaskets have never stuck to either of the surfaces; however, I will defer to John Walker's superior experience on the subject.
250 grit sandpaper seems a tad to agressive for my tastes...I use 400 wet/dry on a plate of quality glass. Note: refrain from using old, aka wavy glass for surfacing (knocking down the hight spots) on your valve covers.
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If it flows, it goes. If its smooth, it moves. Any questions? 96 993 C2 (Current) 87 911 Factory Turbo-Look Cab (Sold) 85 911 Factory Turbo-Look Targa (Gone) |
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