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Cam cover - on which surface to apply sealant? Topic is solved

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Cam cover - on which surface to apply sealant?

Post by j-dawg » Sun Mar 12, 2017 1:45 pm

Got me a big squeezy tube of anaerobic sealant and a foam roller to reinstall the top half of my cylinder head. One thing that is not consistent in all the instructions I've read on the intertubes: should one apply the sealant to both surfaces that will be in contact, just the top half, just the bottom half, ?????

My inclination is to put sealant on the top half and leave the bottom half clean, where I will install the spark plug seal o-rings. I suspect the surfaces are clean and flat enough that it doesn't matter either way, but if anyone with experience can chime in, that'd be appreciated.
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Re: Cam cover - on which surface to apply sealant?

Post by misha » Sun Mar 12, 2017 2:55 pm

Bottom surface but make sure that you install it in 15 minutes after the sealant is applied.After that it isn't usable anymore.
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Re: Cam cover - on which surface to apply sealant?  Topic is solved

Post by rspi » Sun Mar 12, 2017 3:49 pm

I always apply the sealant to the cover. It is anaerobic so there is no rush to install the cover. It will NOT dry as long as air is on it. Two hours, 6 hours, 48 hours, doesn't matter as long as it is kept clean. I usually don't apply to much, don't want it clogging the small oil passages. Apply it like a thick coat of paint. The cover almost seals itself, the sealant just seals the deal.

One of those 1.69 oz tubes will do 2 or 3 covers.
Last edited by rspi on Mon Mar 13, 2017 11:53 am, edited 2 times in total.
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Re: Cam cover - on which surface to apply sealant?

Post by beigg » Sun Mar 12, 2017 3:52 pm

misha wrote:Bottom surface but make sure that you install it in 15 minutes after the sealant is applied.After that it isn't usable anymore.
How so? The anaerobic stuff will never set to dry until both surfaces are tightened down.
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Re: Cam cover - on which surface to apply sealant?

Post by rspi » Sun Mar 12, 2017 3:54 pm

Start at 15:15

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Re: Cam cover - on which surface to apply sealant?

Post by cn90 » Sun Mar 12, 2017 5:00 pm

rspi wrote:..It is aerobic so there is no rush to install the cover...
@rspi, you need to add a prefix "an" to that word. It should be anaerobic.
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Re: Cam cover - on which surface to apply sealant?

Post by misha » Sun Mar 12, 2017 5:21 pm

beigg wrote:
misha wrote:Bottom surface but make sure that you install it in 15 minutes after the sealant is applied.After that it isn't usable anymore.
How so? The anaerobic stuff will never set to dry until both surfaces are tightened down.
Don't know....that's what i was told at "stealership" a long time ago.
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Re: Cam cover - on which surface to apply sealant?

Post by beigg » Mon Mar 13, 2017 12:50 am

misha wrote:
beigg wrote:
misha wrote:Bottom surface but make sure that you install it in 15 minutes after the sealant is applied.After that it isn't usable anymore.
How so? The anaerobic stuff will never set to dry until both surfaces are tightened down.
Don't know....that's what i was told at "stealership" a long time ago.
They're just hoping to stealer more of your monies if you believed them...
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Re: Cam cover - on which surface to apply sealant?

Post by misha » Mon Mar 13, 2017 3:43 am

Not me....i stopped to believe in them back in 2002. ;)
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'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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Re: Cam cover - on which surface to apply sealant?

Post by MadeInJapan » Mon Mar 13, 2017 9:59 am

I have some anaerobic sealer in a tray along with the little roller all in a plastic bag that's been there for over a year and it can still be used because it's still very tacky.
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