I need a sealant for the LIM on my SE that is compatible with fuel and can handle high temps. The ones I saw at the auto stores are either one or the other but not both. Any suggestions? How hot does the LIM actually get?

Please don't ask why I'm not using the gasket. It's too long of a story.

Mike

 

copper if you must but even the red ones should be fine. you only need a dab or it will be painful to remove the gasket later on.

 

Thanks, but neither one of those are compatible with fuel. It says it in the directions.

 

If I knew how hot the LIM actually gets, It would be easier for me to make a choice. There are some good aircraft sealants designed to seal against air and fuel, but they can only withstand about 250-300 degrees.

 

I use it all the time and I dont see any issues with them. Its purpose is to glue the gasket to the intake manifold to seal it properly. The only areas where the gasket will see gasoline is on the intake ports. In fact I use them on headers as the flange get warp over time.

 

Thanks. Since you seem to have experience with these sealants, let me tell you what's going on, and you can give my some input. When I was trying to remove the old LIM gasket off the engine, I used a die grinder with a wire wheel. Long story short----I now have an uneven surface on the engine side. When I mounted the LIM with a new gasket, it sucked air. What do you think?

Mike

 

A silicone should cover the air gap between the manifold and the gasket. for some unknown reasons, I had a feeling that something happened during the clean up process.

 

Yeah, it was a hard lesson learned. I had the LIM machined perfectly even, so at least that's good to go. Do you think I should use the gasket and sealant or jsut the sealant? If both, should I use the sealant on both sides or just the enging side?

 

I will use both gasket and silicone but no silicone on the engine side provided that you didnt gouge the surface.

 

So you don't think I should put the sealant on the engine side, since that's the side that's uneven? I figured that the sealant would work its way into the uneven areas more easily.

 

so which exactly is uneven? Intake manifold flange facing the motor or the motor side. At any rate, siliconizing both sides of gasket wont hurt either.

siliconizing

 

I love that new word you invented "siliconizing" (ha,ha,). It is the engine side that is uneven. I'm going to take your advice and put some sealant on both sides. I just don't want to over-do it and have any sealant spooge out into the intake ports and get sucked in the engine.

Thanks,

Mike