4ringpieces
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« Reply #15 on: March 09, 2017, 08:58:55 AM »
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Have you checked for pressurising of the coolant system? I suspect you have an underlying problem
Coolant also lubricates water pump bearing too
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adam-
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« Reply #16 on: March 09, 2017, 09:57:08 AM »
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How do you know it failed?
Never had an issue. Genuine VW, no problems. I ran water for 2 years too.
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dokalanyi
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« Reply #17 on: March 09, 2017, 10:51:54 AM »
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How do you know it failed?
Never had an issue. Genuine VW, no problems. I ran water for 2 years too.
Interesting question -- I took the mechanic's word for it. Now I've just checked by boiling it in water, and it actually opens. So it's still fine. WTF. |
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dokalanyi
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« Reply #18 on: March 09, 2017, 10:52:39 AM »
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Have you checked for pressurising of the coolant system? I suspect you have an underlying problem
Coolant also lubricates water pump bearing too
Please give me more information on this. I believe I have an underlying problem, which isn't the thermostat. |
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nyet
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« Reply #19 on: March 09, 2017, 11:01:55 AM »
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Use distilled water and a proper coolant  |
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4ringpieces
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« Reply #20 on: March 09, 2017, 11:19:47 AM »
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Pressure blows rubber hoses not temperature, unless your hoses are about 25/30+ years old
I suspect you have pressurisation in your coolant system be it from slight headgasket failure or other reasons
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dokalanyi
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« Reply #21 on: March 09, 2017, 11:35:27 AM »
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Pressure blows rubber hoses not temperature, unless your hoses are about 25/30+ years old
I suspect you have pressurisation in your coolant system be it from slight headgasket failure or other reasons
Would knock cause head gasket failure? |
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IamwhoIam
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« Reply #22 on: March 09, 2017, 02:26:53 PM »
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A thermostat cost like $10 and takes 20 minutes (max) to change.
100 dollars says you've never seen a 2.7TT thermostat and don't have a clue where it lives  |
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I have no logs because I have a boost gauge (makes things easier)
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KasperH
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« Reply #23 on: March 09, 2017, 03:57:08 PM »
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100 dollars says you've never seen a 2.7TT thermostat and don't have a clue where it lives And you would win  But there was never a mention of it being a 2.7TT Or any mention at all what car it was, and that is my error for not asking in the first place  But since he has tried it himself, I'm assuming it's more likely a 1.8 20vT Edit: just researched 2.7TT thermostat, and that is just a ridiculous amount of work for such a "simple" thing |
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« Last Edit: March 09, 2017, 04:55:59 PM by KasperH »
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KasperH
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« Reply #24 on: March 09, 2017, 04:00:12 PM »
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Would knock cause head gasket failure?
Severe knock/detonation could cause that, yes |
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nyet
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« Reply #25 on: March 09, 2017, 04:17:10 PM »
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Edit: just researched 2.7TT thermostat, and that is just a ridiculous amount of work for such a "simple" thing At least the 2.7t afterrun thermostat is "easy" to get to |
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dokalanyi
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« Reply #26 on: March 10, 2017, 12:59:09 AM »
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Severe knock/detonation could cause that, yes I have some knock, but I wouldn't call it severe. But again, I don't know what severe is. Like 5 knock events in a 2k-6k pull severe? |
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4ringpieces
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« Reply #27 on: March 10, 2017, 03:07:22 AM »
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Even slight knock events over prolonged periods can damage a headgasket
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TijnCU
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« Reply #28 on: March 10, 2017, 05:02:50 AM »
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Easy way to diagnose a faulty head gasket is to run the engine with coolant cap removed. If you see bubbles, for sure the hg is defective. If there is no bubbles, no guarantees  I had an 8v that would pressurize the system, it held for 2 months and then it just gave out in one big cloud of steam and flooded cylinders... |
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dokalanyi
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« Reply #29 on: March 10, 2017, 05:42:20 AM »
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Easy way to diagnose a faulty head gasket is to run the engine with coolant cap removed. If you see bubbles, for sure the hg is defective. If there is no bubbles, no guarantees I had an 8v that would pressurize the system, it held for 2 months and then it just gave out in one big cloud of steam and flooded cylinders... I heard bubbles just as I parked now. I heard a bubbling sound in the cooling system. Will check when I get home. |
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