2.5 n/a diesel - interference or not?
Discussion
Evening all, I'm trying to advise someone on a Landy facebook page. He has bought a non-runner 2.5d n/a with unknown history and a snapped timing belt. He is of the opinion that the engine has done what TDi's do and snapped its timing belt, giving all the usual piston/valve interface problems.
However, I was pretty sure that the 2.5, being essentially a bored out 2.25, is still non-interference like the 2.25? Therefore if the belt has snapped there should be no damage, right? (AFAIK, it was the totally new head design of the 200Tdi that turned it from non-interference to interference valvegear?)
Wrong - he has taken the pushrods out and they are all spectacularly bent shapes. He says this is proof that it has "done a TDi", but I'm not sure at all. I am Increasingly thinking the engine has been hydraulic'd, the sudden halt to rotation being what bent the rods and snapped the belt?
Can someone confirm either way?
Thanks!
However, I was pretty sure that the 2.5, being essentially a bored out 2.25, is still non-interference like the 2.25? Therefore if the belt has snapped there should be no damage, right? (AFAIK, it was the totally new head design of the 200Tdi that turned it from non-interference to interference valvegear?)
Wrong - he has taken the pushrods out and they are all spectacularly bent shapes. He says this is proof that it has "done a TDi", but I'm not sure at all. I am Increasingly thinking the engine has been hydraulic'd, the sudden halt to rotation being what bent the rods and snapped the belt?
Can someone confirm either way?
Thanks!
AFAIK when the belt goes the valves will meet the pistons but because the valve are perpendicular to the piston they stay straight and the load gets transferred to the push rods mostly. You can end up with damage to the rockers etc.
The pistons and valves should be ok so it shouldn't need the head removing to sort it out. You need to check push rod seats and make non of the rockers have cracked
The pistons and valves should be ok so it shouldn't need the head removing to sort it out. You need to check push rod seats and make non of the rockers have cracked
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