Multi I/C Replacements
Question to those who are on thier 2nd and
3rd I/C's? Have any of you modified your
resevoir cap to unpresureize the I/C system
yet?? There was a post on this and how remove the spring so the system does not get
itself presureized. Have you tried this mod
to the cap on your new I/C's yet. I had my
I/C replaced in july last year and did the mod when I read it on this board. So far with
another 18000 miles I've not gotten a leak as
of yet with this I/C? Seems like a good mod
not presureizing the system if you think about it. I think this could help if you haven't allready tried this Mod


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Robert B. Chuhran

 

The problem is that the resivor would then be at 0 psi and the intake would be at somewere between 25 in of vaccum and 9psi of pressure. We still han a pressure diferential. I would think that the trick would be to hook the tank up to the pressure in the intake so that the tank would always be at the same pressure and have no desire to leak. The only problem is that it may want to boil under vaccum. So now we need a diaphram of some sort. hum We may be better off to let Ford recall all of these, replace the intake and ic and we would all be happier.

Andy

 

awhittle, you have an interesting theory, but I believe the leak is primarily initiated by the deflection induced by the pressure differential ACROSS the intercooler, not the boost pressure itself. Under low load/vaccum conditions, the bypass valve is open so there is no deltaP across the intercooler. Conversely, there is a small deltaP across the intercooler when under high load/boost conditions (bypass valve is closed) due to its small inherent pressure loss. In addition, there are thermal growth differential issues that may cause the crack to open and close. Regardless, if the closed intercooler system is internally pressurized due to expansion of the water as the temperature goes up, seepage could probably occur under vacuum conditions. So eliminating the cap seal may minimize the coolant injection. According to testing I’ve done, the intercooler water temperature will never get very warm (< 150F) unless WOT for extended periods of time (> 15secs) or in some towing conditions.

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Joel.......
99.5 White Lightning,
SVT # 0056

[This message has been edited by JoeLightning (edited 04-13-2001).]

 

Huh ?!? What did he say?