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I would test the reservoir cap. a weak/inferior hose can blow at normal pressure.
Posted by: MarvelousS4 (8945) on 2016-05-19 20:40:59 In Reply to: coolant over pressure posted by Daiko on 2016-05-04 10:34:49	Share \| Report

Did you test the pressure in the system?

Thread:

coolant over pressure - Daiko 2016-05-04 10:34:49 (585 views)
- Check head for flatness with straight edge and feeler guage. Any gaps should be <2 mils (0.05mm) - doron 2016-05-20 13:00:32 (456 views)
- You can have the head pressure tested to find the leak if it is due to a crack. - ThetaTau87 2016-05-20 10:02:45 (463 views)
- Common to have small cracks at the spark plug threads. Okay if not too big - UrS4boy 2016-05-19 22:27:37 (842 views)
- oh and there was no bubble in the overflow because the coolant was at the cap - Daiko 2016-05-19 22:09:00 (470 views)
  - The cylinder pressure is about 150PSI, so the combustion gases escaping into the coolant - scarman 2016-05-20 10:44:15 (501 views)
    - 150PSI from pure compression, ~1500PSI from combustion... ~3KSI in knock. - hydrochloric 2016-05-20 19:48:06 (442 views)
    - Thanks for the answer - Daiko 2016-05-20 12:40:07 (466 views)
- My blown head gasket was seemingly spontaneous, and all five cylinders had water in them... - ttankers 2016-05-19 22:06:34 (511 views)
- My crack was around the spark plug holes, but it was a slow leak into the oil, not high pressure - lliejk 2016-05-19 21:35:01 (842 views)
  - my head gasket didnt looks damaged at all, no big crack, no small crack, nothing at all!!! - Daiko 2016-05-19 22:03:18 (514 views)
    - Burning oil and burning coolant have very different smells. It should be easy to tell which it is. - ThetaTau87 2016-05-20 09:59:50 (466 views)
- I would test the reservoir cap. a weak/inferior hose can blow at normal pressure. - MarvelousS4 2016-05-19 20:40:59 (494 views)
  - When my head gasket initially over pressured my cooling system it laid the relief valve on its side - ttankers 2016-05-19 22:08:41 (463 views)
  - i got 2 hoses - Daiko 2016-05-19 20:46:40 (480 views)
    - i found the turbo exhaust side is strange - Daiko 2016-05-19 21:31:17 (589 views)
      - Well that's another coolant/engine contact area. Can't say I have seen that white stuff before,  -  lliejk  2016-05-19 22:20:40 (484 views)
        
        Any significant amount of coolant discharged through the turbine would clean off some of those  -  scarman  2016-05-20 10:17:27 (461 views)
        
        Well since it was smoking a lot and the coolant was overpressured  -  Daiko  2016-05-20 10:45:46 (468 views)

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