YD25DDTI Primary chain failure

[Nevthenavara]

Had primary timing chain failure at freeway speed, just need to confirm this would result in valve damage?

Considering options, if required, possible long engine or low km complete swap, needs to be a timely outcome.
D40, 2007.Auto 200,000km. otherwise in good mechanical condition.
Any thoughts, Cheers.

 

[Old.Tony]

At freeway speed your engine would have been doing about 2200rpm or so. Nearly guarantees that a piston is going to meet a valve - the camshafts may not have a lot of momentum but at any given moment the chances are that at least one valve pair is partly open. The engine will run on a bit because even though it's an auto, the torque converter would have been engaged locking the driveline - so with a good chance that valves were open, those valves will be toast. You'll know for sure if the engine came to a very sudden stop - even if the engine continued turning over, it may have clipped a valve.

Inspection is necessary.

A rebuild guarantees a good known engine and you can make sure you have a double-row timing chain and a decent set of tensioners in it. A second-hand or even a reco may suffer the same fate as your current engine!

 

[Nevthenavara]

Yep, Did a bit more research & reading, striped covers off checked chains, no damage other than chain/sprockets, head off tomorrow to check & send. if all ok, Ill stick with what I've got, & get a retro chain kit.
Was really disappointed to see the auxiliaries reliant on "a bicycle chain", sorta found out the hard way, but that's motor cars for ya. Check chains every 60000-80000Kms.
Thanks for the confirmation, next post I hope I'm sorted. cheers.

 

[Bad Juju]

Gotta say your taking this unfortunate event rather well.... I would be in the dealers with a large bat looking for whoever signed off on the last service.

 

[kernels]

One of my good friends is a VW mechanic, at 200 000ks, he would say that the YD25DDTI lasted twice as long as it was supposed to !

 

[Bad Juju]

But he is used to Amaroks blowing up twice by 75k

 

[kernels]

But he is used to Amaroks blowing up twice by 75k

Yep, all new cars are rubbish these days.

Nevthenavara : Following your experience, is there anything the rest of us should watch to try and avoid this situation ? Did you get any strange noises ? Noises during start-up ? This is the second chain-failure at highway speed that I've heard of, which is quite odd, I would expect failures to happen when things are pushed, not when they are happily running 'steady state'

 

[Nevthenavara]

This vehicle is my wife's daily drive, I drive it rarely, Even though there is no "service schedule" for this item, I would now treat it as a serviceable item, as a timing belt etc., i.e. R&R at/prior to 80k. I feel dumb/sheepish, saying it now. I think, I did hear some chain noise at cold start up that morning, in-between wife barking & kids screaming, It was due for service in 600km. (& engine oil has been changed every 5000k, for those wondering.)

 

[kernels]

This vehicle is my wife's daily drive, I drive it rarely, Even though there is no "service schedule for this item, I would now treat it as a serviceable item as a timing belt etc., i.e. R&R at/prior to 80k. I feel dumb/sheepish, saying it now. I think, I did hear some chain noise at cold start up that morning, in-between wife barking & kids screaming, It was due for service in 600km. (& engine oil has been changed every 5000k, for those wondering.)

Did you buy it new ? If second-hand, how many k's did it have when you got it ? Full regular service history ?

Realistically, a major engine failure like this on a 8 year old car is terrible, Nissan should be embarrassed.

 

[camo.b]

Ive noticed a rattle on start up in the past few days...is it a sign?

 

[Nevthenavara]

Purchased 2nd hand @ 125k, serviced as per book, just really missed what should be a service item,
Have heard same engine idling, in a low k vehicle thinking just didn't get to in time. but it would be one of the most ill-conceived under-engineered components on an other-wise half decent engine. but like most engines today one component failure has to take out other components.
If your mileage is up there, (60-80-100k) get it checked.
Ref start point I found:http://www.yd25.com.au/index.php/timing-chains/diagonise-a-timing-chain-fault
But most is covered in other treads in this forum.

 

[Nevthenavara]

Yep get it checked....

 

[Nevthenavara]

This may have helped 3mths ago.
http://www.yd25.com.au/index.php/timing-chains/diagonise-a-timing-chain-fault

 

[Simsy]

Yep a rattle at start up is the big tell tail I would defiantly get it looked at and look up yd25.com for a duplex chain kit I did mine last year had Nissan fit it and it worked out cheaper than the OME kit. My Nissan dealer was that impressed that they contacted YD25.com for a price list for future chain replacements.

 

[camo.b]

I rang paul at yd25 today.nice bloke.$1600 for the kit tho.he said rattly on startup is the top chain tensioner retreating in.he said the same thing...get it done now!

 

[Simsy]

If you think his price is high wait until you talk to Nissan and they will only have a single row chain. His kit comes complete with all chains gears and tensioner's

 

[camo.b]

I do think its high and i do realize its a full kit (assuming the vac pump shaft is there too) its what i need,not what i want...i would rather have spent that money with Unichip and not on a crappy timing chain!...i actually thought i would escape the dreaded timing chain replacement.
At least i can fit it.

 

[Simsy]

no need for the vac pump shaft with the YD25.com kit. its a direct fitment with the current kit. My point was that the duplex kit is actually cheaper than the OME kit and heaps better. I definitely understand the cost thing I had to spend all the money that I saved for my suspension to get mine done.

 

[camo.b]

I bet its a good feeling when its all done...just a bad taste as only done 104tho

 

[Simsy]

bad taste for sure mine was at about 120,000 but people have had them fail as low as 30,000 its just a crap design they should never have had a single row chain in a high torque diesel it just dosent make sense.