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crventura Profile
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Date Registered: 11-2014
Location: Melbourne
TOTAL POSTS: 22
Reply | QUOTE
Re:


The chain had skipped 2 teeth.

I use 91 mostly and no fuel or oil additives.

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2007 T30 ST-S Extreme
20/Mar/2015, 5:05 pm Link to this post Send Email PM   Send Private Message Blog
 
crventura Profile
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Date Registered: 11-2014
Location: Melbourne
TOTAL POSTS: 22
Reply | QUOTE
Re:


Also, the piston rings were changed as they couldn't be moved by hand, some preliminary reading by me suggests this could account for the excessive oil use.



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2007 T30 ST-S Extreme
22/Mar/2015, 10:56 am Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5407
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Re: X trail won't start - Update: Piston rings and timing chain issues


How many kms has the engine done and what oil are you using ?
The standard 5W-30 oil used by the dealers is great for fuel economy but as the engines get older they use oil because of the wear and our hydraulic timing chain tensioners need high oil pressure to stop the chain being too loose at high RPMs, possibly skipping teeth, so a higher grade 5W-40 oil will help with that.

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Kev X450(c) T30 Guru
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23/Mar/2015, 1:24 pm Link to this post Send Email PM   Send Private Message Blog
 
crventura Profile
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Date Registered: 11-2014
Location: Melbourne
TOTAL POSTS: 22
Reply | QUOTE
Re:


It's done about 75,000km's, just using the standard 5W-30.

Would it be a good idea for me to use a heavier oil once it's all back together?

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2007 T30 ST-S Extreme
24/Mar/2015, 2:52 pm Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5407
Reply | QUOTE
Re: X trail won't start - Update: Piston rings and timing chain issues


Yes the 5W-40 will help the hydraulic timing chain tensioner in the higher RPMs

---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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24/Mar/2015, 5:03 pm Link to this post Send Email PM   Send Private Message Blog
 
crventura Profile
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Date Registered: 11-2014
Location: Melbourne
TOTAL POSTS: 22
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Re:


So the heads have been machined and rebuilt and the timing chain replaced and the car still won't start.

We haven't re-ran the diagnostics yet to see what codes it spits out.

I think the car will end up at Nissan next week to get sorted... Using a friend who's a mechanic is proving to be a pain!



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2007 T30 ST-S Extreme
3/Apr/2015, 12:08 am Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5407
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Re: X trail won't start - Update: Piston rings and timing chain issues


I take it that you have the Check Engine light on then ?
Does the engine sound like it wants to start or just like the starter motor is turning it over ?
Does it turn over fast or slow ?
Have you checked the spark plugs to make sure you are making spark ?
Is the fuel pump pumping fuel ?

---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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5/Apr/2015, 10:07 am Link to this post Send Email PM   Send Private Message Blog
 
bqeted Profile
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Date Registered: 04-2014
Location: Perth WA
TOTAL POSTS: 62
Reply | QUOTE
Re: Re:


following this one, seems very low kms for all the problems

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Ted from WA Maroon 2002 TI Roofrack,Nudgebar,Towbar,Hitech Cat back twin exhaust.Yokahama Geolander AT's
11/Apr/2015, 3:06 am Link to this post Send Email PM   Send Private Message Blog
 
crventura Profile
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Date Registered: 11-2014
Location: Melbourne
TOTAL POSTS: 22
Reply | QUOTE
Re:


So we've now taken the car to an auto-electrician as it still won't go.

The car simply stopped in my garage, no check engine lights, no rough performance, nothing out of the ordinary except needing a jump start a week prior.

At the moment the mechanic has

-Changed the crankshaft, camshaft and throttle position sensors (originally getting crank/cam shaft error codes)
-Replaced the timing chain (had apparently skipped 2 teeth)
-Machined the heads and replaced the piston rings etc (there was low compression in a couple of the cylinders and the piston rings were seized/grimed up)
-manually checked the voltage across a whole bunch of wires... all of them are correct so far

Aside from that, things like the fuel pump, spark etc have been checked multiple times and seem to be fine. I'm not sure what error codes, if any, are being displayed at the moment.

The starter motor is turning over and trying to do it's thing, but the engine simply won't start.

Hopefully the auto-electrician will deliver some positive news in the coming days when he gets a chance to have a look.



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2007 T30 ST-S Extreme
16/Apr/2015, 1:16 pm Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5407
Reply | QUOTE
Re: X trail won't start - Update: Piston rings and timing chain issues


I'm wondering from all that if the spark plugs have had their leads plugged back on in the correct order ?

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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16/Apr/2015, 1:51 pm Link to this post Send Email PM   Send Private Message Blog
 


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