Simple 3-step complete coolant drain (updated w/ refill procedure + water pump tips)
09-30-2015, 01:05 PM
#62
Drifting
Sorry for the dumb question but how do you keep from exceeding 10 PSI when flushing out the old coolant?
09-30-2015, 01:47 PM
#63
Nordschleife Master
Thread Starter
I just pressed a piece of rubber flap (hole in the middle to accept the air hose as shown in post #1) on the neck of the coolant tank that doesn't seal completely. I modulated the flow by allowing air to leak out partially. You don't need it to be air tight at all. Someone said they just use a plastic shopping bag to form a "seal" between the hose and the coolant tank neck.
02-23-2016, 12:28 AM
#64
Three Wheelin'
Successful coolant drain using compressed air - thanks for the tip.
I'm the guy who doesn't bother with the 2 litres in the heater core but somewhere along the way someone talked about a crush washer on the drain plug.
There isn't one is there?
jasper
I'm the guy who doesn't bother with the 2 litres in the heater core but somewhere along the way someone talked about a crush washer on the drain plug.
There isn't one is there?
jasper
03-21-2016, 02:58 AM
#68
Ahsai,
Great Great write up. 1 question however.
When preforming step 3 where you lower the hose, undo the coolant drain plug again, then shoot air into the lowered hose, do you do this with the big hose from the thermostat still removed? You make no mention of saying to reconnect it before step three.
What has be confused is you say in step 3 that "coolant will come out of the metal flange and drain plug", no mention of any coming out of the big hose since it would I imagine if it were still disconnected, so there I assume it is reattached before step 3.
But then you say, "Now go and reconnect the two hoses and tighten the drain plug and you're done." So since you say reconnect "the two hoses, so now it sounds the big hose was still supposed to be disconnected during step 3 since you say connect "the two hoses" which would have to be the big hose and the one which hangs down.
Just want to make sure I do it correctly.
Thanks.
Great Great write up. 1 question however.
When preforming step 3 where you lower the hose, undo the coolant drain plug again, then shoot air into the lowered hose, do you do this with the big hose from the thermostat still removed? You make no mention of saying to reconnect it before step three.
What has be confused is you say in step 3 that "coolant will come out of the metal flange and drain plug", no mention of any coming out of the big hose since it would I imagine if it were still disconnected, so there I assume it is reattached before step 3.
But then you say, "Now go and reconnect the two hoses and tighten the drain plug and you're done." So since you say reconnect "the two hoses, so now it sounds the big hose was still supposed to be disconnected during step 3 since you say connect "the two hoses" which would have to be the big hose and the one which hangs down.
Just want to make sure I do it correctly.
Thanks.
03-21-2016, 03:22 AM
#69
Nordschleife Master
Thread Starter
Ahsai,
Great Great write up. 1 question however.
When preforming step 3 where you lower the hose, undo the coolant drain plug again, then shoot air into the lowered hose, do you do this with the big hose from the thermostat still removed? You make no mention of saying to reconnect it before step three.
Great Great write up. 1 question however.
When preforming step 3 where you lower the hose, undo the coolant drain plug again, then shoot air into the lowered hose, do you do this with the big hose from the thermostat still removed? You make no mention of saying to reconnect it before step three.
What has be confused is you say in step 3 that "coolant will come out of the metal flange and drain plug", no mention of any coming out of the big hose since it would I imagine if it were still disconnected, so there I assume it is reattached before step 3.
But then you say, "Now go and reconnect the two hoses and tighten the drain plug and you're done." So since you say reconnect "the two hoses, so now it sounds the big hose was still supposed to be disconnected during step 3 since you say connect "the two hoses" which would have to be the big hose and the one which hangs down.
Just want to make sure I do it correctly.
Thanks.
Thanks.
03-21-2016, 11:12 AM
#70
Shameful Thread Killer
Rennlist Member
Rennlist Member
Otherwise very nice job and thanks for putting it together. Will make getting all the little voids filled with coolant much easier.
03-21-2016, 12:20 PM
#71
Nordschleife Master
Thread Starter
Good catch! Let us know how this works out for you. Too bad it won't let me go back and correct the typo. The post is too old for editing already.
This is a great write-up that I will be using in a few days to refill after my center radiator install. Only thing I caught which is pretty minor is the vacuum here is measured in inches of Mercury. So the above should be '~27" Hg'.
Otherwise very nice job and thanks for putting it together. Will make getting all the little voids filled with coolant much easier.
Otherwise very nice job and thanks for putting it together. Will make getting all the little voids filled with coolant much easier.
04-24-2016, 09:23 PM
#73
Nordschleife Master
Thread Starter
09-03-2016, 03:25 PM
#74
Rennlist Member
Ahsai, I just did my drain and LT thermostat this morning using your technique. Brilliant and SO easy. Worked a treat with minimal mess or fuss. Thanks again!!