Might have a problem

[Baz]

Right Had the st on track yesterday from 12 to about 3pm and about 40 mins on that was changing pads ( due to the heat ). but I did 10 hard laps toward the end of the day and was keeping an eye on water temp all day(because i just changed the waterpump) was running about 95 degrees all day but this time it was at 100 degrees so i pulled in and drove around the paddock slowly to cool the brakes.

Within a min or two it it dropped down to 90degrees so I stopped ,pulled the bonnet and the expansion bottle was 3/4 full, so I locked up the car and went to spectate came back and the levelin tank was back to normal.

Took off the rad cap and there was loads of green Gack floating on top of the coolant.It Has'nt lost any coolant and was fine on the drive home from the track

Anyone shed any light on this?

 

[Shaun]

I just had a little search online and the only thing i can find/think of is boiled coolant/antifreeze, probably wrong though
good luck! (Y)

 

[andy]

have ya changed the thermostat ....may be just abit of contamination from the sealer ya put on the new pump...try a coolent flush and see how things go..

 

[imp124]

my coolant looks a bit of a funky colour at the minute but im not too worried, if theres nothing on the oil cap, no coolant loss, misfires or any symptoms like that, im sure it will be fine.

another case of imp124 paranoia lol

 

[Shaun]

i hate paranoia at one point i thought my head gasket went.... but then it turned out to be the exhaust lol

 

[Baz]

Going to do a coolant flush now but the standard radiator obviously aint doing its job anymore. . . . . .Andy new a thermostat went in two months ago,you could be right about the sealer although I didnt excessively use it

 

[imp124]

like you said, just flush it out and see what happens (Y)

 

[Duncan]

I wouldn't be worried, even 100 is nothing like too hot. I've run cars up to 120o and they have survived. And the only think to watch out for in coolant is the oily stuff, gunk of other types is almost impossible to flush out entirely so there is often something or other floating around in there.

 

[Baz]

I wouldn't be worried, even 100 is nothing like too hot. I've run cars up to 120o and they have survived. And the only think to watch out for in coolant is the oily stuff, gunk of other types is almost impossible to flush out entirely so there is often something or other floating around in there.

I did the coolant flush by takin the rad out pressurizing it with a garden hose and loads of gack came out of it.What ever it was it the coolant sank to the bottom of the container i put it in so it wasnt oil.Also took out the thermostat and flushed out the engine put everything back and seems to be fine

 

[imp124]

when i flushed mine out with coolant flush, that seemed to leave a lot of gack in mine, was almost like very watery jelly

 

[Duncan]

lol "gack" are you guys *sure* you invented english????

 

[imp124]

yes, gack is a very technical term for crud or some form of corruption / contamination

 

[Baz]

lol "gack" are you guys *sure* you invented english????

Sure I'm Irish lol

yes, gack is a very technical term for crud or some form of corruption / contamination

Yes "GACK" is the only word for what this is

 

[imp124]

i know very lttile about coolant etc but it to me it looks like the coolant may have boiled a little? and formed this stuff, did you use the same type of coolant as before the pump went? and in what concentration

 

[Baz]

i know very lttile about coolant etc but it to me it looks like the coolant may have boiled a little? and formed this stuff, did you use the same type of coolant as before the pump went? and in what concentration

Yeah man I reckon thats what happened. I usually put the halfords coolant mix in and a bottle of redline water wetter but I used carplan cheap blue coolant this time. Also I usually have the heating on full while out on track but I was far to hot in the car on friday so i left it off so that could have eee the reason also.

Its seems to be grand now.Although I reckon my turbo has to rebuilt soon ,I had the look at it while I had the rad out.Alot of shaft play more than usual but there's no oil in the boost pipes??

 

[imp124]

oh dear, why what up with your turb, i leave the heaters on 1 or 2 when im in standing traffic, not that it overheats just makes me a bit more comfortable reading the temp gauge

 

[Baz]

oh dear, why what up with your turb, i leave the heaters on 1 or 2 when im in standing traffic, not that it overheats just makes me a bit more comfortable reading the temp gauge

I wouldnt bother on normal everyday driving Steve tbh. I don't know I used Mobil Super S 10w 40 for the track and it seems to be just flowing out of the engine on pretty much every seal and now the turbo's showing signs of wear,the car got roasted in fairness.

Really shows you you get what you pay for, I'll be using the redline 15w 50 again from now on never had a problem with it. No point in trying to save abit of money when it comes to these cars

 

[imp124]

I wouldnt bother on normal everyday driving Steve tbh. I don't know I used Mobil Super S 10w 40 for the track and it seems to be just flowing out of the engine on pretty much every seal and now the turbo's showing signs of wear,the car got roasted in fairness.

Really shows you you get what you pay for, I'll be using the redline 15w 50 again from now on never had a problem with it. No point in trying to save abit of money when it comes to these cars

true, i learnt that the hard way

 

[Baz]

Alot more healthy looking

 

[imp124]

thats a question ive been meaning to ask, how full do you fill your radiator, as mine is about 1cm above the fins but when warm it moves a bit more up to mabe 3 - 3.5cm

 

[Duncan]

I'd fill 'er up, and most of the overflow too. It will suck in what it needs and overflow from the overflow what it doesn't

BTW on the temp gauge....I checked mine against a thermocouple and H on the gauge is only about 95o. Not really hot at all. Hot is 110+

 

[Baz]

I'd fill 'er up, and most of the overflow too. It will suck in what it needs and overflow from the overflow what it doesn't

BTW on the temp gauge....I checked mine against a thermocouple and H on the gauge is only about 95o. Not really hot at all. Hot is 110+

Thats crazy

 

[Duncan]

meh, I've run the race car to 125 without ####ing it....132 was too much tho (whoops). remember boiling point of water rises with pressure. and down here anti-freeze is not a big deal so many just run distilled water - it holds a fair bit more heat than a water/glycol mix.

 

[Baz]

meh, I've run the race car to 125 without ####ing it....132 was too much tho (whoops). remember boiling point of water rises with pressure. and down here anti-freeze is not a big deal so many just run distilled water - it holds a fair bit more heat than a water/glycol mix.

Being a plumber I understand all that alright. Yeah I just got a fright when I seen the factory gauge up that high then had to double check on the nismo gauge to see what was actually happening