Air locks ??? Grrr...!

[kapri]

Well I've been slowly working through my '98 on 2.5 di engine ( not the bunch of bananas one ). I've already changed the fuel filter to try to sort an intermittent air lock in injectors problem.

Yesterday I fitted a new lift pump and replaced the cracked rubber sleeve fitted to the tank supply pipe ( some one has cut off the ' snap on ' type fitting). I also changed the bleed off pipe arrangement on the injectors putting the return from number 1 instead of 4 plus a nice new air filter element .

It's now even WORSE , requiring bleeding 3 times in a 150 mile round journey with the last one not being successful , well so far.

There is mention on another thread of a load sensitive piston in the injection pump that sometimes sticks ? Can anyone point me in teh roght direction on that one please

Is there any particular areas I should look for air coming into the system as it's now officially getting on my tits !

[MrMPuk]

Does it run okay for a bit then require bleeding? If it does then check the breather on the tank and also the strainer on the suction line inside the tank.

[FredTransit]

I take it this is the bosch pump. It could be a seal in the injection pump, it went in one of ours and wasn't as bad as yours, but you could stop to fill up and then it would need bleeding.

[kapri]

Yup, runs OK for awhile and then , without rhyme or reason ,it needs bleeding again. It is the Bosch pump which a previous owner had been told wasn't well but would that keep causing continous need for bleeding ?

What's the sort of price to be expected for getting one looked at / overhauled if it turns out to be that ?

Can anyone point me at thhis diaphragm thing ?


Good news, I should have workshop manual tomorrow !!!

[MrMPuk]

Try this first as it is quite common!

Does it run okay for a bit then require bleeding? If it does then check the breather on the tank and also the strainer on the suction line inside the tank.