Any Nissan mechanics onboard?

[unstuck]

Need some advice concerning yd25 duplex chain conversion, best I have been able to find are aussies and those fuckers are anal to say the least.:wait:

[R650R]

Need some advice concerning yd25 duplex chain conversion, best I have been able to find are aussies and those fuckers are anal to say the least.:wait:

Skylines Australia forum????

[unstuck]

Skylines Australia forum????

Been trolling the Navara forums over there for info, but they cannot seem to agree on the advice they are throwing around. Found an agricultural thread from the uk that seems to be a little more convincing in their advice, but finding info in NZ on price and availability of parts seems to be harder than getting Ed to admit he is a drug addict.:rolleyes:

[Grumph]

There's a pom on the Laverda Forum - Andychain - who seems to know his stuff when it comes to chain. He's solved the Laverda triple primary drive probs by supplying a duplex chain intended for a Mercedes cam drive. Replaces a triplex which is too heavy and unavailable in the right quality now.
I've got a couple of them here for customer motors, Iwis if I remember right.
He's also supplying competition cam chains for Jags and Aston Martins etc....
Pretty sure you'd find contact details on the forum - sorry, I'm crap at doing links.

[unstuck]

There's a pom on the Laverda Forum - Andychain - who seems to know his stuff when it comes to chain. He's solved the Laverda triple primary drive probs by supplying a duplex chain intended for a Mercedes cam drive. Replaces a triplex which is too heavy and unavailable in the right quality now.
I've got a couple of them here for customer motors, Iwis if I remember right.
He's also supplying competition cam chains for Jags and Aston Martins etc....
Pretty sure you'd find contact details on the forum - sorry, I'm crap at doing links.

Cheers Grumph. Will have a bit of a look. I think I may end up walking away from this one because I cannot seem to get the info I need. Nissan are being very unhelpful.
Some people saying the motors have balance shafts, others saying no. Some saying have to drop the sump, others saying no. Some saying there is a sissor gear oil pump, others saying no. Cannot get the info I need from Nissan, so may be best to let A nissan dealer do the job, be the first time I have walked away from at least having a go.:confused:

[R650R]

These guys are pretty good. I don't have a skyline but my wagon has a VQ35 engine....

http://www.sau.com.au/forums/forum/79-vehicle-specific-discussion/

Also try Cockram Nissan in chch, I have got parts off them no worries where as my local dealer is no good for non NZ models....

[unstuck]

These guys are pretty good. I don't have a skyline but my wagon has a VQ35 engine....

http://www.sau.com.au/forums/forum/79-vehicle-specific-discussion/

Also try Cockram Nissan in chch, I have got parts off them no worries where as my local dealer is no good for non NZ models....

07 Navara with a yd25ddi motor, well known for wearing lower simplex fuel pump timing chains, but local nissan dealer wants 3 1/2 grand to replace it. Can get a chain kit sent from the uk for $247 , but not really keen on tackling it without the proper info.:niceone:

[R650R]

07 Navara with a yd25ddi motor, well known for wearing lower simplex fuel pump timing chains, but local nissan dealer wants 3 1/2 grand to replace it. Can get a chain kit sent from the uk for $247 , but not really keen on tackling it without the proper info.:niceone:

Its prob an engine out job or something. Read a thread awhile ago about a similar job someone was doing 'at home'.... Soemthing about the coolant routing, drain refill hassle etc, the usualy story of removing ten times a s much crap to get at the 'easy job'.... the Camchains also wear too despite the urban legend that they are better than cambelts (well they are but they still wear eventually)... so maybe hes budgeting on that too.

[neels]

I'll talk to the guy at work who looked into this recently, there it a kit available ex oz to replace the single chain with a duplex, so it won't crap itself and cost 4k again. Work ute is a 2010 2.5 Navara so think its the same engine

[AllanB]

At least with chains they rattle for thousands of kms or so when tired before fucking - belts if unattended just explode! Appears to be a move back to chains in cars.

[awayatc]

Had balancer chain snap on saab at 140.000 kms....
Knocked a hole in casing. Got it all sorted in the end, but learned a few new swear words.
Not that keen on chains any more.

[unstuck]

At least with chains they rattle for thousands of kms or so when tired before fucking - belts if unattended just explode! Appears to be a move back to chains in cars.

Apparently the ones in these motors have a habit of snapping, causing a $7grand rebuild. Something to do with the common rail fuel pressures putting too much strain on the simplex chain for the fuel pump. Chain for the cams is duplex, and seem to last a lot longer, but the tensioners are made from crap plastics which break down and end up being sucked into the oil screen and causing extensive damage.:shit:

[unstuck]

I'll talk to the guy at work who looked into this recently, there it a kit available ex oz to replace the single chain with a duplex, so it won't crap itself and cost 4k again. Work ute is a 2010 2.5 Navara so think its the same engine

Probably this outfit. http://www.yd25.com.au/index.php/timing-chains/diagonise-a-timing-chain-fault

[Motu]

I thought the YD25 was pretty good, although they aren't as common as the ZD30 which has too many problems to list. I did an injector pump on one last year in a van, nasty, nasty, nasty.

[unstuck]

I thought the YD25 was pretty good,

According to most of what I have read, the only real problems are the timing chain and tensioner issues. Simplex timing chain for the fuel pump has a life expectancy of about 75000 km, and the tensioners for the cam chain shag valves in the hydraulic tensioner fairly regularly. After market replacements have only been getting 10000-40000km before shitting themselves.
The duplex conversions from the link I posted seem to cure most of these issues, but trying to nail down availability and price seems to be a bit of a chore.
And still unsure wether or not I would have to drop the sump, or wether they have balance shafts or not. Seems to be many varying opinions from Nissan.:confused:

[Motu]

They went from gears and chains to belt drives, a good thing for the motor trade, as cars became more reliable and service times extended, we had the cambelt to keep us going for years and years. If not replacements then fixing the fuckup when it broke - thank you vehicle manufacturers. So now we have chains - uh oh, there goes our cash cow. But no, these things seem to last only a few thousand more km than a belt, and there is a shit load more work and costs involved in doing it. The Holden 3.6 V6 is a good example, what a fuckup - roller chain or morse, they both wear out.

Here is a Holden we did last year that was one key start away from catastrophe.

http://i1009.photobucket.com/albums/af212/bmwr65/2013-11-14143154_zpsf4b5ecb7.jpg

[unstuck]

I much prefer belts, most of the ones I have done have been straight forward. Just downloaded a manual for the yd25, and the only bit that is missing is the section on timing chains.:brick::brick::brick:

[Motu]

I prefer gears that last forever, or a chain that lasts the life of an engine - why build in huge maintenance costs over the lifetime of an vehicle?

[unstuck]

I prefer gears that last forever, or a chain that lasts the life of an engine - why build in huge maintenance costs over the lifetime of an vehicle?

Nothing it seems, is built to last for any great length of time these days. Thats why I prefer older cars myself, the newer stuff seems to wear out rather quickly.
This Navara has less than 100,000kms and the fuel timing chain is shagged already, not good enough for my liking.:nono:

[Kickaha]

I prefer gears that last forever
Unlike the fibre timing gears on Holdens

[Motu]

Mainly a problem on that stupid Starfire engine, they used to chew up the fibre gear, and you couldn't fir an alloy one. Most red engines were reringed or reconditioned and the old gear reused. Worked on red engines for years and only did a couple of cam gears - we did them in the car, didn't pull the cam out. Did more Starfire cam gears than 6 cyl.

[Kickaha]

Mainly a problem on that stupid Starfire engine, they used to chew up the fibre gear, and you couldn't fir an alloy one. Most red engines were reringed or reconditioned and the old gear reused. Worked on red engines for years and only did a couple of cam gears - we did them in the car, didn't pull the cam out. Did more Starfire cam gears than 6 cyl.

I did one on a HT 161 and a HQ 173 and plenty of others I knew did them as well, bought an alloy set from Repco off the shelf and did it in the driveway

[Motu]

I was probably working on them when they were newer and came to a garage for repair, not done as a home job. Still, they lasted a shit load longer than a chain does in a 3.6.