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kam-325i
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Thu Aug 24, 2006 12:46 pm

De-Pressurise the fuel system on a M20B25 ?

I am about to start to remove the head.
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kam-325i
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Thu Aug 24, 2006 1:06 pm

C'mon chaps.......i am itching to get started, ill lose the moment....and it wont get started till after christmas !!!!
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Project_E30
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Thu Aug 24, 2006 1:12 pm

I stripped a head and didn't depressurise it at all.

Just leave the fuel rail connected to the inlet manifold.
smithy318i
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Thu Aug 24, 2006 1:13 pm

pull out fuse 11 with the engine running and wait for the engine to stall.

(it would have been quicker to use the search function btw)
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kam-325i
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Thu Aug 24, 2006 1:13 pm

I intend to strip down the fuel rail aswell....

Going to be looking at the condition of the injectors.
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kam-325i
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Thu Aug 24, 2006 1:14 pm

smithy318i wrote:pull out fuse 11 with the engine running and wait for the engine to stall.

(it would have been quicker to use the search function btw)
Thats what i was after, the fuse number......Thanks dude....
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kirils
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Thu Aug 24, 2006 1:57 pm

i just removed the hose and it depresured in my face :mad:
kam-325i
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Thu Aug 24, 2006 9:18 pm

Well, halfway through taking off the head, and there is hardly any mayo.....BUT shed loads of mustard !!!!!

Dose the oil in the sump stay emulsified ? As the engine has not been run for a good 2 days now, there is still mustard on the oil filler cap, rocker cover breather pipe and some in the pipe from the crankcase to the inlet manifold, but the oil in the sump is fine....no sign of mustard on the dipstick either...
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Thu Aug 24, 2006 9:46 pm

remove the oil cooler pipes and get that blown through with some compressed air, mayo tends to cling in there and re-appear later on.

once you're all back together I'd run her up to temp using some cheapy oil, then drain and refill( with filter again ) with some decent stuff


Fluch the entire cooling sytsem out with a hosepipe too.

doing well fella !
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kam-325i
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Thu Aug 24, 2006 9:50 pm

Good thinking bat-man.....i was thinking of how to clean out the oil cooler section....

Is it worth connecting up the TB Heater pipes, i cant see the TB icing up in this counrty....

The cooling system does not seem to be that bad, i have all the front hose's off and the thermo housing, and they look pretty mayo free...
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gareth
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Thu Aug 24, 2006 10:44 pm

before refilling with coolant, run some TFR (traffic film remover) through it. your internals will never be cleaner!

it cost me about £12 for a gallon at my local motor factors and i used 1/4 of a bottle and flushed twice (in for a few days each time). i then flushed with plain water for a few days and refilled with cooland. hey presto!

mine was totally full of chocolate custard and it was so thick i couldn't get it out of the rad! this stuff worked a treat!
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