Yup!!Another one of those coolant threads..
#1
el unico
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Yup!!Another one of those coolant threads..
I don't post much,cause search is my friend,but this one is getting on my nerves! Long story short,I've done the AST elimination,replaced the radiator filler with an 86,blocked the lower hose where overflow used to go,placed overflow hose on 86 cap,replaced the freiking rad cap 4 times already,as well as the t-stat.The car would overheat like there's no tomorrow,and coolant just disappears.Its not coming out of the exhaust(no smoke at all)but somewhere in front,POSSIBLY overflow tank,AND radiator cap.Ive pressure tested the system and have gotten no lost pressure,no coolant in oil,etc.Should I just eliminate overflow tank completely?Im tired of burping the system with the funnel,and adding coolant at every shutdown.Water pump????I have a fluidyne rad,and just a few other mods that shouldn't interfere with cooling,including power FC that hasn't given me a problem before.Thanks for your time
To pressurize the system,I had to kink the overflow hose also.The temps go up and down as I'm driving,more up when I'm at a light,then extremely high losing all coolant.
To pressurize the system,I had to kink the overflow hose also.The temps go up and down as I'm driving,more up when I'm at a light,then extremely high losing all coolant.
#2
Greasy bastards..
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we need to know did this just start since you eliminated the ast? did it work fine with the ast? it takes alot of time to purge the system without the ast in place
#3
Eh
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If you dont see steam in the engine bay and you dont see coolant pouring out the overflow, it is likely a coolant seal failure. I have seen coolant seal failures that didnt cause the car to smoke, however, it wasnt losing so much coolant that it would overheat instantly, you could usually let the car run a couple hours before over heating or low coolant light coming on.
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el unico
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the overheat problem started before the ast removal,with the stock rad,I thought the rad was bad so I got the fluidyne,removed ast and has gotten worse.Steam does come out the front,mainly from the cap because of over pressure I think.My IC pipe(at the turbo side)gets wet from coolant but I still can't see in reality where it's coming from.I have purged the system 5-6 times already,and every time after I have to refill.I DO hear and feel coolant on the hoses moving after it's overheated and the car is off,with the cap off as well.Should I block the overflow tank to see if I'm getting air/coolant issue fixed,or should I try a WP instead?Thanks again.
#5
Racecar - Formula 2000
If it is blocked near the tank, coolant can also escape from the standard joint in the coolant recovery line. That line is not designed to handle much pressure.
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Racecar - Formula 2000
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el unico
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Yes I've replaced the cap 4 times already.I've also removed it many times to burp the system,but never went towards the overflow tank.One problem I DID have before,Dave,was water coming OUT I the overflow tank,with the stock rad,and ast.Should I replace the hosing on overflow?
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el unico
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I kinked the overflow hose shut,added coolant,burped and drove for about 10-15 miles,stop and go then highway.On stop and go,temps reached 107c max once,then up and down between 97c and 105,then came the highway.I babied it(I usually do),then did about 80-85 for about a mile or two and temps stayed at 97c,dropping down to 91c until I got off exit and drove home where at shut off and ignition on temps went at 105c with fans on.The radiator was not cool but cold to the touch at those temps and fans blowing cold air(naturally).I removed the radiator cap,had what I believed was a bit of air bfore some coolant wanted out,but kept hearing a gurgling noise coming from the turbo area.I could feel the gurgle(almost like a rabbit,ferret water bottle sound when they're drinking water)through the radiator hoses as I felt them.I ended up adding a bit of more coolant and calling it a night.Temperature outside is about 40 degrees if that makes a difference.
(damn that sounded like a novel)
Thanks once again for your input
#11
Racecar - Formula 2000
#12
Racecar - Formula 2000
I'm trying everything in my power to not accept that great possibility.
I kinked the overflow hose shut,added coolant,burped and drove for about 10-15 miles,stop and go then highway.On stop and go,temps reached 107c max once,then up and down between 97c and 105,then came the highway.I babied it(I usually do),then did about 80-85 for about a mile or two and temps stayed at 97c,dropping down to 91c until I got off exit and drove home where at shut off and ignition on temps went at 105c with fans on.The radiator was not cool but cold to the touch at those temps and fans blowing cold air(naturally). Comment: The cold radiator is normal at these ambients.
I removed the radiator cap,had what I believed was a bit of air before some coolant wanted out,but kept hearing a gurgling noise coming from the turbo area.I could feel the gurgle(almost like a rabbit,ferret water bottle sound when they're drinking water)through the radiator hoses as I felt them. Comment: Gurgle at shutdown is not unusual at warmer ambients, but shouldn't be there at 40F ambient. What thermoswitch are you using? I had some gurgle with the stock one, but it disappeared with the FC switch.
I ended up adding a bit of more coolant and calling it a night.Temperature outside is about 40 degrees if that makes a difference.
I kinked the overflow hose shut,added coolant,burped and drove for about 10-15 miles,stop and go then highway.On stop and go,temps reached 107c max once,then up and down between 97c and 105,then came the highway.I babied it(I usually do),then did about 80-85 for about a mile or two and temps stayed at 97c,dropping down to 91c until I got off exit and drove home where at shut off and ignition on temps went at 105c with fans on.The radiator was not cool but cold to the touch at those temps and fans blowing cold air(naturally). Comment: The cold radiator is normal at these ambients.
I removed the radiator cap,had what I believed was a bit of air before some coolant wanted out,but kept hearing a gurgling noise coming from the turbo area.I could feel the gurgle(almost like a rabbit,ferret water bottle sound when they're drinking water)through the radiator hoses as I felt them. Comment: Gurgle at shutdown is not unusual at warmer ambients, but shouldn't be there at 40F ambient. What thermoswitch are you using? I had some gurgle with the stock one, but it disappeared with the FC switch.
I ended up adding a bit of more coolant and calling it a night.Temperature outside is about 40 degrees if that makes a difference.
Dave
#13
Racecar - Formula 2000
Yes I've replaced the cap 4 times already.I've also removed it many times to burp the system,but never went towards the overflow tank.One problem I DID have before,Dave,was water coming OUT I the overflow tank,with the stock rad,and ast.Should I replace the hosing on overflow?
Water continually coming out of the O-F tank could be a symptom of several things:
1. leaky pressure-relief cap (not holding at least 0.9 bar)
2. overfilled O-F tank
3. leaky or blocked/kinked tubing, etc., from AST to O-F tank, causing coolant to not be pulled back to engine as coolant cools off
4. crack in the O-F tank itself, below the full coolant level
5. and finally, the dreaded coolant seal problem.
IMO, it would be a good idea to replace the O-F tubing to eliminate that as the source of the problem. It doesn't take much of a leak to allow it to suck air instead of coolant back to the engine. The O-F tubing could also be kinked or blocked, giving similar symptoms. If it is kinked/blocked, you may hear air being sucked in as you open the cap.
Again, good luck with the diagnosis.
Dave
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el unico
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I'll do that Ihor,as long as you don't make fun of my engine area or how it's all a mess!!(and hopefully I can actually make it there without exploding)
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el unico
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Update;
New water pump
New t-stat
Replaced O/F tank and hoses
New cap(pressure release)
Burped the **** out of the system and took itnou for a spin,and max temp on PFC was 102 I believe.My temps before were no higher than 90 after getting on it,now that I don't it jumps up!Parked the car and heard the bubbling,waited to cool and had to add more coolant,and oneni took it out temps went from 87 to 116.The funny thing is that the stock temp gauge will go up and then swings back down to the middle after 20-30 seconds,and that's when I start to see the Temps go back down on the PFC.The fans are also working,and as much as I hate to say it,the ONLY odd thing I found was when burping the system,a piece from the t-stat gasket came up.I checked it(removed t-stat and it mustve been in there from some other time.
Any suggestions?
New water pump
New t-stat
Replaced O/F tank and hoses
New cap(pressure release)
Burped the **** out of the system and took itnou for a spin,and max temp on PFC was 102 I believe.My temps before were no higher than 90 after getting on it,now that I don't it jumps up!Parked the car and heard the bubbling,waited to cool and had to add more coolant,and oneni took it out temps went from 87 to 116.The funny thing is that the stock temp gauge will go up and then swings back down to the middle after 20-30 seconds,and that's when I start to see the Temps go back down on the PFC.The fans are also working,and as much as I hate to say it,the ONLY odd thing I found was when burping the system,a piece from the t-stat gasket came up.I checked it(removed t-stat and it mustve been in there from some other time.
Any suggestions?
#25
Eh
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Depends on the miles on the engine. However, it is pennies difference to replace the major stuff that generally needs replaced. If the engine had less than 10k miles on it wouldnt be horrible to reuse the apex seals, apex seal springs, corner seal springs, side seal springs, etc. However, at the minimum you should replace the Coolant seals, Tension bolt o-rings, dowel pin o-rings, and oil control rings.