Originally Posted by
dedwards0323
From my perspective, both products are well suited for this application. If you look up the products on the Permatex website, you'll find the following applications listed under Automotive:
Suggested Applications: Valve covers, oil pans, transmission pans (Ultra-Grey), intake manifold end seals, timing covers, water pumps (Ultra-Grey), thermostat housings (Ultra-Grey), differential covers (Ultra-Black)"
The operating tempature range (-65F to 500F) is identical for both products. You probably would achieve a good seal using either of these products. But to the original question, the consensus amongst the Forum Members is the Ultra-Black product. I personally used the Ultra-Grey product with excellent results to-date.
Technique & procedure is a major contributor to the success of this repair. And we all agree on that point.
Good luck with your repair.
Amen to that! If you choose not to remove the oil fill tube (I didn't), make sure you let the breather cover dry right side up before applying sealant. If you don't, oil will "weep" from this area no matter how well you may think you've cleaned it. I cleaned it twice, and still had oil so I stayed the course and cleaned a couple more times especially around that area until it stopped. If you don't, that slight bit of oil will contaminate the procedure, and you won't get a thorough seal. I let the cover sit overnight (right side up) and checked before I applied sealant.