Boiling ATF

[Jeff54Griffin]

Drilling it out today!
Thanks,
Jeff

[68autobug]

I hope that fixed the problem

LEE

[Jeff54Griffin]

not yet Lee!  After drilling out the line I blew out (in reverse) all of the oil lines to clean them and behold the ATF is all pink and foamy.  I am begining to believe that my pump(not new) is wearing out and is turning the liquid to foam. Is this possible, probable???   I am out of my relm here so just guessing.  I don't want to put it back together until I have this nailed down.  Any ideas???
Thanks,
Jeff

[68autobug]

Hi Jeff
I only know that water turns it pink, but maybe foaming will do the same??
although You can usually see the water in it..  I presume that air in the ATF would do the same..??
check the ATF pump pressure releif valve spring , hopefully it maybe broken {easy fix}[not enough ATF pressure]
or the relief valve piston has stuck in its bore.. [so not enough ATF pressure]...

its opposite the pressure outlet.. Mine has an allen key head and I've never taken it out...[lol]
the blockage in the ATF pressure line may have caused it..??
the pumps don't wear the steel plate much apart from a few score marks.
Running them with no ATF could cause scoring.. My original pump was scored a bit  but worked perfectly.[on the steel plate]
and no wear on the alloy housing that I could see. the pumps I have now had no marks at all in the alloy...

cheers

LEE

[Jeff54Griffin]

Thanks, Lee.
My ATF pump plate has no scoring on it and I did replace all of the seals/gaskets before reinstalling it.  The relief valve was stuck when I first removed it but cleaned the bore and piston/spring.  I am going to get a pressure guage to check the pressure.  Unless it shows higher or lower pressure than 42 lbs I am going to assume that the foam is not being produced in the pump.
I looked back in the archives and found a thread by Sean on how to properly replace the ATF which I am going to do.  I ordered max purple ATF  fluid (DexronIII) which I am going to try.
The hole in the fitting is almost 1/4" now.  Can't go any larger with this fitting.
Jeff

[Jeff54Griffin]

Well I followed Seans post on how to flush ATF and it pumped out pink foam for several seconds and then eventually turned the regular deep red of the ATF, NO FOAM!
I took the car out for a short run and it felt more responsive.  I pulled the return line from the holding tank and NO FOAM.
I will take it out tomorrow after work and give it a longer run to make sure it doesn't overheat.
Jeff

[68autobug]

Well, Jeff

it sounds like the problem was the foaming ATF..
I don't think it would be able to get pumped, because it was aerated..??
I'm guessing of course..  ?? but sounds reasonable to Me...

so Maybe You have fixed the problem of too slow a flow of ATF..??

cheers

LEE

[Jeff54Griffin]

Hi Lee,
so far I think that the too small hole in the aftermarket fitting, less than an 1/8 inch, and the large diameter of the hose was causing the pump to work very hard to force the ATF through the restriction was producing the foam.  The lack of enough fluid maybe caused it to overheat.
I know that before drilling out the fitting to 1/4" ID the return line to the tank was a foamy dribble.  Now it is a good dark red flow.
I am taking it out tonight for a good long run to make sure, I'll let you know.
Jeff

[Jeff54Griffin]

Well, finally success!!!!  Long run, about 30 minutes, and NO BOILING.  Rechecked ATF fluid in tank and it is still dark red with no foam. I could actually touch the tank with my hand.  So it appears that the problem was the very small hole diameter in the aftermarket fitting in the high pressure side. .
Thanks for all your help.
Jeff

[68autobug]

Great News Jeff

LEE