I want to do an intake leak test and the service manual says to use propane to do it. It says if there's a leak then the tone will change. What kind of bad consequences can result when propane enters the engine?

 

If the manual says to use propane, I don't think they would suggest it if it had adverse effects on the internal engine components.

 

Boy a spark or static electricity sure would affect you though. I think I would use carb cleaner or WD 40. IMHO

 

Might be a bang up job after all.

 

Water works fine and will not cause any trouble. and no mess

 

I would be more comfortable trying the water first. Just pour water on the area and look for bubbles? or what?

 

BUBBLES ? Is this Lawrence Welk or something? And a one and a two and a three

 

Some Don Ho maybe? Tiny bubbles....in my beer....

 

I'm thinking that since it's the intake manifold, if you use a spray bottle and spray water in the intake manifold area, if there is a leak, you'll hear a definite difference in how the engine runs. Same same with WD-40. Or as Ross Perot used to say about Washington, you hear a giant sucking sound.

 

I would def use something that is non-flammable. Water would not be a bad choice at all. When you spray the water onto the intakes, the idle will change if there is a leak.