Took my chargecooler pump apart... and guess what?

[bojangles]

THE impellor looks perfect. the rubber is perfect, but the inner hub spins freely and the rubber was not turning. The housing shows marks on it like it has been stuck for some time now.
I used the touch test and the charge cooler was always hot, never cool. I ordered the impellor last week but I thought I would get a head start on the job ( since my front wheel is out for staightening..)

I wonder how much faster the care will be??

Id post pic if I could figure out how...
Bruce

[dr.hess]

All liquid-to-air charge coolers will use a pump of some sort. Air-to-air charge coolers, as found on the MR2 don't have a pump, of course.

Dr.Hess

[adrianmugridge]

When I took mine to bits, the impellor looked fine, not worn. But, looking at the end there was an impression of the impellor blades on the metal casing, so I concluded that it had not been turning. Again, the CC was hot, it should be cool as you say. Mine was giving me two problems : Coolant loss and lack of power. When I changed the impellor and the rest of the gubbins it cured the leak and it went much faster !! Dont forget to note the position of the spindle that goes back into the hole, otherwise it will take you ages to get it back in again ( I did not and I was sitting in boot all day trying to get the bloody thing back in again ! ).

Adrian
Former Charge-Cooled GT3 and now Sport 350

[DrieStone]

Gazboy said:

Is liquid more effeciant? Hence the higher boost pressures? How do you combat heat, and detonation/knock, I need water injection to run more than 17 psi, I believe you all run that as standard?

Liquid is more efficient by nature, which means you can have a smaller intercooler, and therefore less loss across the intercooler.

That said your cooling medium is always going to be warmer than ambient temperature (unlike an air-to-air IC.) You of course need a pump and a radiator as well.

There are advantages to both designs, the liquid-to-air set up makes the most sense on the Esprit.

Water injection is a different matter. Lotus doesn't use any kind of water injection.