engine and drivetrain Coolant Sprayed Out, Found On Engine Bay

[M3M3]

Probably got pulled off when changing the radiator.

[TobyB]

I too vote for the t- stat hose.

 

I have had thermostats that leaked at the crimp- together seam, though.

 

t

[OriginalOwner]

+1, the t-stat hose is not fully seated.  

 

AND check tightness of all hose clamps.  I once forgot to add any tight to the hose clamp on the lower radiator outlet.  Everything is fine, then all of a sudden the temp needle is climbing.  Turns out the internal system pressure actually forced the hose off the outlet.  Fortunately I was in front of a quickie mart, lots of water available.

 

Cheers,

 

Carl

[PaulTWinterton]

Andrew fix your darn hose/clamp! You'll probably be good to go.

I wish all problems were that easy.

[Andrew Havens]

Went to the auto parts store and rented a pressure tester. The one I used didn't need any adapters. I screwed it on, gave it a few pumps and at about 1-2 PSI it was enough pressure to get this nice stream of coolant:

Snugged up the hose, tightened the hose clamp, topped off the coolant, tested again at about 5 PSI, and didn't find any more leaks. Definitely going to use that thing again in the future!

Thanks all for your help!

[TobyB]

Did you slide it down so that it's gripping on the sealing part of the thermostat?

 

t

[Andrew Havens]

Yeah, that's what I meant by "snugged up the hose", sorry that was not clear.

[JohnS]

I cringe when I see people using those U.S. style hose clamps with the slots in them.  They bite into the hose and don't work very well IMO.  I always go with Gemi style hose clamps.  Preferably BMW ones, but that's just me...

 

BelMetric is your freind:

 

https://www.belmetric.com/metric-clamps-norma-hose-clamps-c-15_145.html

Edited April 8, 2014 by JohnS

[ndog]

glad these guys helped you fix that' you should consider a full coolant hose r/r. i think I.E. sells it cheap or bluntech

[ColinK]

"Bought a jug of 50-50 coolant"

 

Once you get the leak fixed, completely drain the system (don't forget to open the drain for the block - check the FAQs).

Refill with BMW coolant (or MB) as that 50 50 stuff most likely won't play well with the head.

[M3M3]

Dunno...been using prestone coolant and us style hose clamps on all my bmws for many years with no issues at all.

[JohnS]

I use Prestone coolant too.  I'm not THAT anal, just about some things