Anyone tried valve cover gasket sealer? Need advice!

Car Maintenance & Repairs
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I’m working on a project car and have run into a bit of a hiccup with the valve cover gasket. I’ve heard mixed reviews about using gasket sealers and I want to make sure I do this right. Here are a few points where I could use some expert input:

What Type of Sealer to Use?

  • RTV Silicone: I’ve seen some people swear by RTV silicone for almost everything, but is it really as effective for valve covers?
  • Gasket Maker: Some recommend using a specific gasket maker, especially with certain materials. What do you think?

Gasket Compatibility

  • Are there certain gasket materials that should NEVER be used with sealant? I want to avoid any leaks down the line.

Tips and Best Practices

  • Any special techniques for applying the sealer? Like, how thick should the layer be?
  • What about curing time? Should I wait a certain amount before starting the engine?

I really appreciate any advice or experiences you can share. I’m looking to maintain a reliable and leak-free seal. Thanks in advance!

3 Likes
2

I’ve had some success with valve cover gasket sealer! Make sure to clean the surfaces well before applying it. Use a scraper to remove old gasket material, then wipe it down with a solvent. It helps create a better seal.

3

Great advice, Sarah! I usually use a wire brush for tough spots. Also, I let the sealer cure overnight before adding any fluids, just to be safe.

4

Definitely agree with letting it cure fully! I’ve tried several brands, and I find Permatex Ultra Black to be the best for a strong seal. Anyone else have favorite brands?

5

I’ve heard good things about Permatex too! But when it comes to surface prep, I think sanding down the edges helps the sealants bond better. Has anyone tried that?

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I haven’t sanded before, but that’s an intriguing idea! I usually just clean, but I’m willing to try new techniques.

7

Funny you mention that! Last time I did mine, I forgot to let it cure fully. Ended up with a messy engine. Lesson learned: patience is key!

1 Like
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Supportive advice here: proper preparation makes all the difference! I also like to apply the sealer in a zigzag pattern, as it helps to ensure an even distribution. Did anyone else try this?

9

Interesting technique! I usually just do a bead, but maybe I’ll give that zigzag method a shot next time. Thinking it might help with coverage.

3 Likes
10

One thing I haven’t seen mentioned yet is the ambient temperature. It really affects curing time! I’ve experienced longer cures in colder temperatures. Anyone else notice this?

11

So true! I had a friend who did his in winter—it took forever! Always good to consider the weather when planning maintenance.

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Just remember, when all else fails, duct tape can fix anything! Kidding aside, following proper steps is essential for a leak-free seal.

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I used valve cover gasket sealer a while ago, and while it worked initially, I faced issues with improper bonding after a few months. Just be cautious about the brand you choose!

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Interesting! What brand did you use? I’ve heard some are better than others for durability.

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I tried one that promised high-temperature resistance, but it degraded within six months. Keep an eye on temperature ratings when shopping!

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That’s good advice! I often overlook those ratings. Did you notice any leaks after it degraded?

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Yes, definitely! I ended up with small leaks that gradually turned into bigger ones. A real hassle to fix!

18

I’ve been using RTV silicone instead of sealer lately. It’s a bit messier, but the bonding seems stronger over time.

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I’ve heard good things about RTV! Is it really that much better?

5 Likes
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Absolutely! I’ve had really good success with it. Just make sure to let it cure properly before running the engine.