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Old 09-13-2011, 03:00 PM   #1
westcanyon1
 
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Tappet cover leaking

Has anyone else had this problem with the tappet cover leaking, it seams like a nightmare to seal and my truck Is leaking like a siv

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Old 09-13-2011, 03:03 PM   #2
1lowdiesel
 
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Weird just did one of these a few weeks ago on a p-pump 24v. If you don't pull the pump the center bolt behind the gov housing is a biatch!
 
Old 09-13-2011, 03:05 PM   #3
mathews8pt

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Fix the tappet cover and add more breathers to the engine. I have a buddy with the same problem right now.
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Old 09-13-2011, 03:11 PM   #4
westcanyon1
 
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Ya it is giving me a fit and I know im gonna have to pull the pump and maybe just load it up with some rTV black?

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Old 09-13-2011, 03:14 PM   #5
1lowdiesel
 
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Na you can do it, but it's tight to get your hands in there.
 
Old 09-13-2011, 03:26 PM   #6
westcanyon1
 
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Ya I forgot to out my timing pin and bracket on and i did it with the pump still on... it was rediculous

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Old 09-13-2011, 07:47 PM   #7
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If you can afford it, I would put a billet Tappet Cover on and be done with it. Some guys glue their tappet covers on with the factory gasket and urethane but after putting a billet on the Corvette I would save and get a billet. IMO
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Old 09-13-2011, 09:36 PM   #8
westcanyon1
 
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Ya that makes a lot of sense to me, I just cant fit it in my budget right now, I am definitely goin to keep that in mind though, where would you recommend getting one for the best $?

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Old 09-13-2011, 09:51 PM   #9
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i had the same problem with my tappet cover. Loaded it with RTV and its fine now
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Old 09-13-2011, 10:20 PM   #10
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I second the billet tappet cover. Had the same problem with my factory one that i used had a constant leak. Then i got tired of it and went with Haisley's billet version and no problems at all now.
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Old 09-14-2011, 12:10 AM   #11
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The two that I have personally seen were caused by natural aging of the gasket material. A billet cover might be worth it for various reasons, but as far as I know a properly installed new gasket will take care of your headache. It is a pain in the butt to get to it with the pump on. Like they^^^^ said, you can do it with the pump on but the extra work to pull the pump is more than made up for with the absence of busted knuckles and creative cursing.
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Old 09-14-2011, 12:19 AM   #12
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all the side tappet cover leaks i have seen in the shop came from excessive blowby, either from high boost causing high cc pressure or dusted/tried engines.

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Old 09-14-2011, 12:22 AM   #13
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Are you using a factory seal? I have not seen aftermarket seals work to well.
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Old 09-14-2011, 12:58 AM   #14
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Get a new gasket from Cummins. With the cover on the bench put the gasket on and then put a bead of black RTV around the inside creating a nice even bevel going from the top edge of the gasket to the cover. Let it set for 4-6 hours until the RTV is skinned over real well but still a little pliable. Put the cover on the truck tightening the cover in a circular pattern working your way out from the center, problem solved.

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Old 09-23-2011, 09:52 PM   #15
01Grizzly

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During my swap I put on a 12v tappet cover. Motor still made too much pressure and was blowing oil out of the rear so I installed a breather in the valve cover and I haven't had any problems since. I wish I would of gotten a Billet cover, but we had a 12v motor sitting around so it was free.
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Old 09-24-2011, 01:24 PM   #16
00 black ram
 
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Get a new gasket and clean the edges of the cover then run a bead of super glue inside the gasket and stick on the cover. Or install the gasket and put the super glue in then, that way you are no fighting the gasket with super glue all over it and it drying on you. I did to mine and know of several it's been done to and no problems.
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Old 09-24-2011, 02:07 PM   #17
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Had this issue on mine to we ended up ditching the 12v tappet cover an went back to the 24v tappet cover with a felpro gasket. The cummins gasket just wouldmt seal right. Easy way to tell if still leaking after putting back together before you bolt pump on is poor oil down lifter holes an check if good then throw pump back on.
 
Old 09-24-2011, 11:28 PM   #18
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Was the 12v cover bent/twisted?
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