Baiscally A freind has fitted a replacement 2.4 di ENGINE in his transit and it sound slike air is blowing back through into the head on combustion from no.2 cyllinder, The engine runs perfectly well on all four cyllinders, we have removed the head but cant see anything that looks untoward. has anyone came across this problem before?
Originally Posted by TheBigShow
Not understanding that at all ??????
If it runs ok then you dont have a problem
I assume you have tested all of the valves/ valvetrain thoroughly? Not an inlet manifold leak? Injector Seal?
How have you come upon the air coming back diagnosis?
glad its not just me who was confused by that!Not understanding that at all ??????
If it runs ok then you dont have a problem
is it like a 'chuffing' noise? poss injector seal?
Yeah a bit like that, sorry for it being confusing. I was going on what a mate said as when i got too him the head was on the deck having some valves lapped in as a precautionary measure.
It could be an injector seal though i hadnt thought of that. I will write up a better explanation.
Apparently the exhaust gasses blowing back into the inlet manifold so they dont think its likely to be injector seals. You can hear the air blowing back inthe air box when it is all connected up.
Unless I am missing something?
Last edited by LED sandwich; 10-04-2012 at 19:37.
There other though was a crack between the inlet and outlet valve lettign exhaust gasses back to the inlet side.
No ideas?
Still doesnt make sense to me so i am not even sure if it has a problem if its running ok. ???
yeah basically a small amount exhaust gasses are somehow escaping to the inlet side, there is good compression on all cyllinders, it runs well and all the inlet valaves have been re lapped in with no change.
Its a bit of a mind **** really the only thing they could think of was a crack between the exhaust and inlet sides of the head somehow letting the exhaust gasses pass back into the intake system.
You do know its got an EGR system so some exhaust gases will be in the inlet manifold ?????
No i did not, could it be a faulty egr valve letting too much pressure back in? as apparently its making a puffing noise, the gasses were in the air box too.
I cant see how the gases would flow the wrong way whilst the engine is running ?????
No this was my thoguht but as it was stripped when i saw it i had to go on there description, as i said there only thoguht was a crack in the head lettign exhausitng air back into the inlet side, but maybe leacking egr would do that.
I think its back together so ill see if i can get a video. AS they say pictures speak a thousand words so a video must be many hundereds of thousands in my book
im also struggling to understand how its runs fine but there is pressure back through the air box... is this when you rev it and let off you hear some air back through the airbox if this is what you mean then it could be turbo stall.. when the waste gate closes and pressured air trapped in the turbo flows back?
if you mean there is flow back through the airbox on idle, well tbh i dont think it can, the only way it would was if the timing was all over the place, but then it would run like shit if it was firing back through the inlet. The only other thing i can think is, that its a 'boom' through the inlet. When the egr opens it can cause a deep booming noise through the inlet that might sound like air is flowing back through the intake pipe, if the egr was stuck open you would get the booming noise constantly, sounds like a deep induction noise.
How does the van drive? lack of power? smoke?
apparently the van drives fine, engine runs sweet this is where the confusion comes from. I will pop in tomorrow and see if it could be the egr. otherwise im not too sure and its a Di so no turbo to be giving any chatter back.
just made a call and its all sorted now, two of the hydraulic lifters wer faulty so the cylinder wasn't fully discharging meaning when the inlet opened the pressurized air pushed back out. Ironically the prize goes to ByeByeGTI for guessing that a week a go accidentally when he thought i was talking about an sr.
Di does have a turbo, it just doesn't have high pressure diesel system like the tdci has, better that way anyway, tdci's can be more troublesome
I am amazing!!! Lol
Never doubt me again Aaron! Lol
Yer its proper name is tddi. A Transit would be sloooooooooooooooooooooooow without a tubby
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