if my ic had a pin hole in it ; would it push air out at idle or suck air in ? i started the car and was under the hood bleeding air outa my upper hose and could hear a hiss . i thought boots , then intake, then hoses . all of the above were good. the sound seemed to be localized to the rear left of the ic surface. passenger side. still thought it was from underneath . put a propane tank to the area with no idle change. so... pulled the ic and filled with water and found some droplets formed in the area of question . or at least close . so if it's a leak ;is this common with a four yr old ic ? and is there nothing to be done but replace it ? i assume air was pushing out as the propane had no effect . but i was under the impression that at idle ,the intake was at vacuum . is the ic area still positive just after the sc? enough to keep the propane from being sucked in?

 

You might try a shop vac on exhaust to pressurize the IC . Duct tape one end and duct tape a hose hooked up to a cleaned out shop vac to the other .Use dish soap to locate leaks by looking for bubbles . You might try JB weld on the leak.

 

good idea . with the vac . but the weld i think won't get in there . i believe the leak is in a finned area. i'd have to destroy the fins . but in light of the alternative ..... any used ones out there?

 

To be clear ..you're looking for a used stock IC right?

 

+1

 

yes i am !!!!

 

douse the area with some windex spray. It it makes bubbles or not will tell you what is going on.

Pull the IC and take to a radiator shop... they'll be able to fix it. But if you clean the area well and rough it a little with some sandpaper then JB weld will also fix it.

YD

 

thx ; but i believe the leak is inaccessible from outside . didn't think to bring it to a rad. shop . i may have to check that out . thx again .

 

and your from where Herbie?