p38 air in water.

BAZZ · Nov 6, 2010

My p38 has got air in the water not CO2. Its had the block refurbed, head has been pressure tested twice and skimmed once. All new hoses, water pump. stat, and temp sensor for the dash gauge as this was faulty. Air is in from the first time off starting engine and builds up pressure enough to blow the pipes off but not through the expansion cap. . This is costing a fortune to sort out, as got a few people stumped so any ideas would be appreciated. Bazz.

Original block split.

jorjio_k · Nov 6, 2010

BAZZ said:
My p38 has got air in the water not CO2. Its had the block refurbed, head has been pressure tested twice and skimmed once. All new hoses, water pump. stat, and temp sensor for the dash gauge as this was faulty. Air is in from the first time off starting engine and builds up pressure enough to blow the pipes off but not through the expansion cap. . This is costing a fortune to sort out, as got a few people stumped so any ideas would be appreciated. Bazz. Original block split.

Hi there.
Did u check the rad bleed pipe if it is clear and throwing back water to the exp tank?and wht abt the viscous fan?it can b the exp tank cap also,the valve inside of it could b stuck closed!preventing exessive steam to escape thus blowing the pipes,one more thing,check the overflow hose on the exp tank,the short one under it,blow in it 2 c if it is open,as well as the bleed pipe blow in it.ask me how i know!!!

gavbriggs · Nov 6, 2010

is it lpg? if so disconnect the lpg/turn it off at the tanks and see if the issues continues. if it doesnt replace the vapouriser!!

BAZZ · Nov 6, 2010

Forgot to mention its a 6pot diesel bmw all pipes are clear, rad cap is new, as is stat and pump. Bazz

fanatic · Nov 6, 2010

Blocked radiator if all else is tested or new

j the range · Nov 6, 2010

crack in head would be my shot. unless you not bleeding it proply..

fanatic · Nov 6, 2010

j the range said:
crack in head would be my shot. unless you not bleeding it proply..

I agree, but from what is said it sounds like head skimmed and crack tested

Datatek · Nov 6, 2010

BAZZ said:
My p38 has got air in the water not CO2. Its had the block refurbed, head has been pressure tested twice and skimmed once. All new hoses, water pump. stat, and temp sensor for the dash gauge as this was faulty. Air is in from the first time off starting engine and builds up pressure enough to blow the pipes off but not through the expansion cap. . This is costing a fortune to sort out, as got a few people stumped so any ideas would be appreciated. Bazz. Original block split.

Unfortunately pressure testing does not always find a cracked head

p38 air in water.

BAZZ

Active Member

jorjio_k

Active Member

gavbriggs

Well-Known Member

BAZZ

Active Member

fanatic

RESPECT IS EARNED, BEATINGS ARE FREE ;-)

j the range

New Member

fanatic

RESPECT IS EARNED, BEATINGS ARE FREE ;-)

Datatek

Well-Known Member

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