new member with questions

Technical questions and answers about the Mazda Bongo

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Ian
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Re: new member

Post by Ian » Mon Jan 11, 2021 3:44 pm

Just a thought, but could it be air being sucked in to the fuel system? There are 2 o rings on the fuel pump that are known to perish over a period of time.
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and
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Re: new member

Post by and » Tue Jan 12, 2021 6:41 am

Hi not sure do you know were on the pump they are cheers
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Doone
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Re: new member

Post by Doone » Tue Jan 12, 2021 11:11 am

My Trading Standards Approved garage: http://www.allansvehicleservices.co.uk
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Re: new member

Post by and » Tue Jan 12, 2021 5:36 pm

i will check tommoro cheers
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Re: new member

Post by and » Wed Jan 13, 2021 2:34 pm

Injectors back in leak off rail on started still smocking on no 4 but as soon as engine gets warm took about half an hour. It stops smocking so the longer it runs the better it gets
So i am thinking valve adjustment to much gap when cold closes as it warms up or worst case piston rings .I have run it with the crank breather pipe off there is some pressure but no smoke or with the oil filler cap of but as you can imagine lot of oil splash .
I did notice a noise like a thin tin plate rattle every now and then like it was from inside the rocker cover as there are no thin plates any were around there where sound came from so i don't know and rain has now stopped play
willow2u
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Re: new member

Post by willow2u » Wed Jan 13, 2021 5:41 pm

It’s it a different injector in no 4
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Re: new member

Post by and » Wed Jan 13, 2021 6:58 pm

yes swapped them over number 3 in number 4 loosen the pipe of no 4 injector smoke stops until engine warms up then the smoke reduces till none visible
willow2u
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Re: new member

Post by willow2u » Thu Jan 14, 2021 1:13 am

Could be air if compressions seemed similar maybe tiny amount of air seeping in then sealing up when hot
TheLongRoad
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Re: new member

Post by TheLongRoad » Thu Jan 14, 2021 8:03 am

Slightly off topic, being a manual makes it a rare one.
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Re: new member

Post by and » Thu Jan 14, 2021 9:27 am

Yes so i believe i did not pay a lot for it last was mot june 2015 hence why i have a engine problem but it was driven to me 50 odd miles.
It has about half Hour welding to do just behind both front wheels rest of the chassis / sills are solid tidy inside its mainly stuff sticking but i think when its done it will be worth a bit or being a bit rare may be not we shall see
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Re: new member

Post by and » Thu Jan 14, 2021 12:43 pm

Checked valve clearance all ok rechecked compression via glow plug my adapter fitted tested each cylinder over 300 psi on cylinders and held that pressure for 5 minuets at least till i released it my gauge only goes up to 300 but compression went of the scale so to speak so now i am getting confused good compression good injectors valve clearances ok.
I don't think fuel pump as a rotary pump does not usually create this type of problem .
bent con rod am i clutching at straws now :?
willow2u
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Re: new member

Post by willow2u » Thu Jan 14, 2021 2:26 pm

Got to be pump I’ve not had one apart but if each injector pipe is fed by separate compression piston no 4 might be us
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Re: new member

Post by and » Thu Jan 14, 2021 5:19 pm

I think it might be the way to go but , today i blanked my egr but i noticed when i checked if the plate had sealed it had, but the inlet side gaskit blew of big time so my inlet is blowing not sucking like i thought it should be :?
willow2u
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Re: new member

Post by willow2u » Thu Jan 14, 2021 6:09 pm

I think in a diesel it is normally pressured
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Re: new member

Post by and » Thu Jan 14, 2021 6:49 pm

i understand but i could blow a tyre up with how much pressure there is coming out :)