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Old 04-14-2012, 10:35 PM   #1
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Default having real trouble getting valve cover to seal

So things are a bit odd. When my motor was built, and the valve cover sealed the first time after things were fine for about 5 months. Then it started sweating at the rear eventually turning into a slight drip. So I pulled the cover, bought a new gasket and re installed it with gasket sealer on the corners of the cam seal caps and CAS cap seal. It was OK for a day then it was leaking like crazy this time now from the rear and also the drivers rear half. I pulled it again, new gasket again and re torqued everything in the correct order and it's still leaking. It's getting really annoying because it's dripping on my header and smoking significantly. I don't want to drive it until this is fixed.

I have a new Capri cover on the way and another gasket waiting to go on to see if it was a problem with the old valve cover.

Ideas? Has anyone had a problem like this before?
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Old 04-15-2012, 12:14 AM   #2
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Stick your dick in it.

Then

Do not overtighten.

Tighten in star pattern. Tq spec is like 7ft lbs or somrthing pussified.

Start light. If still leaking then tighten a littke.

Then bow down before your new god. Me.
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Old 04-15-2012, 12:40 AM   #3
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That's what I've been doing.
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Old 04-15-2012, 12:59 AM   #4
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Should be working.
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Old 04-15-2012, 01:00 AM   #5
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Rtv cornaz????
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Old 04-15-2012, 01:07 AM   #6
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what corners? by the cam seal caps? yes.

I will try my new gasket tomorrow and see what happens.
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Old 04-15-2012, 01:56 AM   #7
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if you want over board and maybe not abbsolutly pretty. Take the cover off, clean the sh-t out of it. Use a cu-tip with one end cut of and spread the RTV in the groove, then spread it on the top of the head (which is clean too) where the cover sits on. Bolt it all together and let it dry for a day. You may be able to see the goo after but it should seal. Over Kill--the way too go when all else fails.
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Old 04-15-2012, 02:08 AM   #8
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letting the rtv dry is a good idea

also do acompression tewst you may have horrid blowby pressurizing valve cover,
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Old 04-15-2012, 02:09 AM   #9
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I know you just had a rebuild, but . . . .

If you're doing everything right and you've got oil leaks popping up here and there -- you may very well have a pressurized crankcase from blowby. Are your breather hoses clear? If they are, you might want to do a compression test. This may be a symptom of something else.
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Old 04-15-2012, 02:38 AM   #10
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Quote:
Originally Posted by Faeflora View Post
letting the rtv dry is a good idea

also do acompression tewst you may have horrid blowby pressurizing valve cover,
Quote:
Originally Posted by hornetball View Post
I know you just had a rebuild, but . . . .

If you're doing everything right and you've got oil leaks popping up here and there -- you may very well have a pressurized crankcase from blowby. Are your breather hoses clear? If they are, you might want to do a compression test. This may be a symptom of something else.
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Old 04-15-2012, 02:27 PM   #11
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What do you mean breather hoses clear? They look like any other breather hose I've seen. I did modify the cover though, drilling and tapping the top with a big NPT brass fitting about triple the size of both stock ones. Could that be the issue? I don't see how it could, really... because it should theoretically have more flow than the stock ports.

I have a leak down tool at work. I guess it's time I check the health of the motor anyways. I am not getting any blowby, and never have in my catch can so it's hard to say.
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Old 04-15-2012, 02:31 PM   #12
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wtf type of RTV are you using.

i like ultra black for the 6 spots you need it.
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Old 04-15-2012, 02:37 PM   #13
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I'd have to check but it's just some high temp permatex stuff. It's not leaking from those areas though, it's leaking from the side above the header and the rear opposite the CAS.
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Old 04-15-2012, 02:38 PM   #14
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I'll take some photos and post up.
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Old 04-15-2012, 02:59 PM   #15
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If it's leaking from those spots, and you have the proper torque on the bolts, then the cam cover might be cracked or something.
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Old 04-15-2012, 03:20 PM   #16
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I was thinking that. Do they ever warp at all? When I put the new cover on on Monday I'll see if it solves the problem. Here's hoping.
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Old 04-15-2012, 03:25 PM   #17
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I doubt it. There's a thick rubber gasket and the bolts aren't strong, so there's no reason for it to warp.
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Old 04-15-2012, 03:30 PM   #18
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the VC on both my ludes warped...but ive never had issue with the miata.
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Old 04-15-2012, 06:52 PM   #19
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Could it be something simple like the CAS O-Ring?
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Old 04-15-2012, 06:55 PM   #20
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No.
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