2.5l N/A diesel Sucking and Blowing

Hi just put replacement engine in my series landy it starts but there is a knocking noise and it is blowing air through the air intake any suggestions please!

could be a siezed/bent inlet valve? remove inlet manifold will identify which pot if you dont know which cyl (or take off rocker cover )

Thanks someone has suggested bump starting it to try and free up the valves is this a bad idea if one of the valves is possiby siezed or bent?

I'd be more worried about what bent the Valve in the 1st place. the timing would need to be out or for it to have thrown the timing belt/chain depending on which engine you fitted. It's also possible that the Head gasket has gone and it's losing compression and blowing through into the inlet manifold.

Either way it sounds like you've fitted a duff engine and only taking the head off is going to tell you how bad it is.

Looks like i be taking the head off tonight then! thanks for the advice will keep you posted.

muckymaddie said:

Looks like i be taking the head off tonight then! thanks for the advice will keep you posted.

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Good luck matey! I'll be replacing my 2.5td this weekend with an fleabay edition-better work as described Now where did I put me shotgun

hope it works out for ya my experience with ebay n engines so far has been crap luckily I know where he lives an I still got his phone number! He may be getting a call soon!!!!!!!!!!!!!

I managed to buy 2 dud engines off fleabay also

The last one - it never burns oil, runs like a dream.
a litre every 300 miles, 3 cracked pistons and all 4 pistons oval... Hum.

muckymaddie said:

Thanks someone has suggested bump starting it to try and free up the valves is this a bad idea if one of the valves is possiby siezed or bent?

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The general recommendation is that you shouldn't bump start a vehicle with a cam belt as the shock can cause the belt to jump. I've never worried about it too much, but if you think the shock is going to be enough to unstick a valve, I would definitely worry about the belt!

Davec said:

The general recommendation is that you shouldn't bump start a vehicle with a cam belt as the shock can cause the belt to jump. I've never worried about it too much, but if you think the shock is going to be enough to unstick a valve, I would definitely worry about the belt!

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i heard this too, and thought it sounded like a load of rubbish - the started will snatch it a lot more, erm, briksly shall we say, so how does bump starting, which works off the flywheel anyway, be any brisker?

cambelt /bumpstarting .is OWT

Update!! Took the head off last night discovered three bent pushrods and one broken one (probably good job I didn't bump her) Ooooo and four wobbly firing pots! took the head off me old engine and the pushrods out refitted and fired her up. Still needs some "fine tuning" Tappets need setting, Alternator belt needs tightening , Needs new coolant pipe (that goes round corners). But at least I managed to get her home!

Well done on getting it mobile. Good job you took the head off, after all.

Yup thanks for that! good to know there are people out there with a clue.

The precombustion chambers are often loose, not too much of an issue. Any clues as to why the rods were bent? Had the belt broken/jumped or summat?

And whats OWT mean?

All I can think is the timing belt has snapped previously and all they did was replace the belt!!!! But anyone with half an idea would of known that it bends the rods when you break a belt on them!