kgctim Posted September 22, 2018 Share Posted September 22, 2018 Bought my MK4 TT Auto about 3 months ago, immediately parked it to work out some concerns I had such as changing the timing belt and all the maintenance that I wanted to ensure was done. Part of my concern was a thorough cleaning of entire engine bay and degreasing the engine. I pulled the PS pump off to rebuild it and finally today I was ready to fire it up and see how it ran. PS Pump was screaming. had a full reservoir, but I didn't think to keep an eye on the fluid level. Opened the cap and the fluid was frothy as hell. Shut the car off and turned from lock to lock to get the air out, topped the res off and tried starting the car again with the cap on the res. pump was a little quieter, pulled the cap off and the fluid was frothing and flowing over so I shut the car off, jacked it up and turned from lock to lock again till it looked like the bubbles stopped. Had my kid start the car again (had the cap off the res this time) and the fluid shot out of the res like a geyser. I threw my tools in the box and walked away.. WTF?? it was like 2 feet high HAHA I'm guessing it has to be air in the lines still, but it looks like the fluid is pressurizing in the reservoir. I went to the store and bought two fresh liters of fluid and planned to try to flush, my concern though is how much pressure its making, its acting as iff the pump feed and the return are switched, I know thats impossible since the sizes are so different, but I'm still super confused! Any ideas?? Quote Link to comment Share on other sites More sharing options...
evinX Posted September 22, 2018 Share Posted September 22, 2018 Should be a quite simple to flush once a new pumps on. What fluid did you use? Should be ATF dex III as the dex II is harder to get. Quote Link to comment Share on other sites More sharing options...
kgctim Posted September 22, 2018 Author Share Posted September 22, 2018 yeah, I bought some euro brand ATF Dex 2/3. Tomorrow morning I will perform the 2 liter flush trick and see how it goes... Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted September 22, 2018 Share Posted September 22, 2018 Did you flush/clean out the res? At the bottom is a really fine filter, that clogs up, the pump cant draw in enough oil and then cavitates, leading to groaning and lots of bubbles Quote Link to comment Share on other sites More sharing options...
Scooter Posted September 23, 2018 Share Posted September 23, 2018 (edited) Definitely clean the reservoir first http://www.mkivsupra.net/vbb/showthread.php?232967-Only-had-it-two-weeks-and-i-think-i-ve-broken-the-PAS-pump-already!&highlight=Lock But needs time to settle between topups Edited September 23, 2018 by Scooter (see edit history) Quote Link to comment Share on other sites More sharing options...
kgctim Posted September 23, 2018 Author Share Posted September 23, 2018 I did pull the res out and cleaned it out with brake parts cleaner then aired it out for about a month LOL. About to go out and perform the 2 liter trick and try to do a full fluid change.. Quote Link to comment Share on other sites More sharing options...
kgctim Posted September 23, 2018 Author Share Posted September 23, 2018 Thanks everyone. The 2 liter trick worked perfect, flushed the system really well and got all the air out. its nice and quiet now! Quote Link to comment Share on other sites More sharing options...
mrs turbo Posted September 27, 2018 Share Posted September 27, 2018 I’ve recently had the very same problem. I have just put a rather large pas cooler in the car, and couldn’t bleed it at all. I ended up cleaning the filter, flushing the system and then using a 1 litre pop bottle, placing it over the reservoir, went for it. Eventually it did bleed up and now works a treat. I’ll try and post a video of the deed. I know it’s. it ideal, but hey, it worked for me. Quote Link to comment Share on other sites More sharing options...
mrs turbo Posted September 27, 2018 Share Posted September 27, 2018 Quote Link to comment Share on other sites More sharing options...
mrs turbo Posted September 27, 2018 Share Posted September 27, 2018 Had to be careful once it was finally bled, using a big syringe I pulled the excess fluid off, and set the correct level. All good. Quote Link to comment Share on other sites More sharing options...
Scooter Posted September 27, 2018 Share Posted September 27, 2018 Pop bottle is a good way to go, what catches people out (did me many moons ago!) is when you start the car the rate of fluid intake/recycling is far higher than you assume and the level drops very very quickly as those that have done it know. I need to flush mine and think I will remove the aux belt and spin the pump by hand this time! Quote Link to comment Share on other sites More sharing options...
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