91Q Valve Cover Reseal

[timatt]

On October 2, I will be replacing everything under the plenum. At the same time I want to re-seal the valve covers.

I want to know whether the 91Q has a seal for the valve cover or whether it uses the Nissan RTV type sealant. Also, I seem to remember reading that some years use both. Can someone guide me here?

timatt

[Q45tech]

RTV 90-93. plus 4 new half moon rubber rear seals.94 and later use valve cover gasket plus dabs of RTV at appropriate places to hold gasket in place for assembly.

[timatt]

Great:

Thats exactly what I've got.

timatt

[Q451990]

This will be a pretty big job for you... but it you're willing to tackle the plenum then the rocker covers won't be much more I guess. One trick that I learned watching Byron reseal my covers, is that he cleaned the mating surfaces on the covers and heads with an angle dye grinder.

http://www.harborfreight.com/c...32046

He used some sort of pad attachment that resembles a very coarse "scrubby" pad that you might use for dishes.

If you have compressed air available, it's well worth it to get the surfaces in as-new condition before the re-seal vs. the method I used in the past (putty knife, dental pick, and give up after three hours).

Heath

[911/Q45]

A trick I tried on my last reseal was to put the RTV on the cam cover relatively thickly, then lightly seat the cover in place and insert the bolts a few turns. Let the RTV set up for about 10 minutes, then torque all the bolts properly. My theory is that this will result in a thicker and longer lasting layer of RTV where it counts.

[gniknave]

I'm reviving this thread...

Infiniti says I can use any type of RTV, but is there a specific brand or color I should use for a valve cover reseal?

[DAEDALUS]

Doesn't matter *too* much--anything other than blue will be fine. Permatex makes a red that is probably very similar to factory red. I'd use that.

[gniknave]

Thanks man. This is gonna be a fun weekend

[Q451990]

Permatex Ultra Grey is used by my local dealership... seems to work about as well as anything, and it blends in nicely with the engine too.

PERMATEX® ULTRA GREY® Gasket Maker

--------------------------------------------------------------------------------Designed for high torque applications (predominantly Japanese designs) requiring a unique RTV gasket. Exceeds manufacturers’ performance requirements. Low odor, non-corrosive. Outstanding oil resistance. Guaranteed not to leak. Temperature range -75°F to 625°F intermittent; resists auto and shop fluids and vibration. Suggested Applications:Valve covers, oil pans, intake manifold end seals, timing covers, water pumps, thermostat housings



Heath

[gniknave]

You caught me just in time before I was about to go out and buy some. Thanks Heath!