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 Post subject: engine
PostPosted: Fri Feb 13, 2009 11:47 pm 
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Ticking over
Ticking over

Joined: Sun Feb 08, 2009 11:09 pm
Posts: 11
Location: mid cornwall
i have a 02 nissan navara d22. it has a noise coming from the engine on acceleration. the engine is easy enough to start but the noise sounds like it is coming from the top end of the engine, ive removed the timing and rocker cover to see if there was anything i couls see. The fuel pump to camshaft timing chain seems to be o.k and in time and the camshafts look in good order. anyone with any ideas. regards ED


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 Post subject: Re: engine
PostPosted: Sat Feb 14, 2009 8:18 am 
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On the motorway!
On the motorway!
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Joined: Thu Oct 19, 2006 2:58 am
Posts: 1436
Location: NSW. Australia
YD25DDTI engine ?

They are known for the drive belts making noises, in Australia we never got em so I am going off what the Euro guys have said.

Dave.


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 Post subject: Re: engine
PostPosted: Sat Feb 14, 2009 10:08 am 
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Fully run in and going strong!
Fully run in and going strong!
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Joined: Thu Nov 15, 2007 10:58 pm
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Location: Northampton
Just had a similar thread and the first thing to do as Dave says is change the drive belts. You can wet them or spray them with WD40 (this will dry out again and stop them slipping) but you may find this shuts them up temporarily.
If it does you can then change them :thumbright:

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Rob

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 Post subject: Re: engine
PostPosted: Sun Feb 15, 2009 9:24 pm 
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Ticking over
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Joined: Sun Feb 08, 2009 11:09 pm
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Location: mid cornwall
thanks for the info guys i dont think it is that, but i will put what ive stripped back together and find out. the van had a new fuel pump 12 months ago anyone no if there is movement between the timing sprockets on the fuel pump ie the 3 allen keys holding the big sprocket on because i was wondering if they had slipped. but first of all i wil try the belts. regards ed.


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 Post subject: Re: engine
PostPosted: Mon Feb 16, 2009 9:00 pm 
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On the motorway!
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Joined: Thu Jan 25, 2007 8:37 pm
Posts: 1502
Location: Farnborough Hampshire
Hi Steady,
I know of one D22 that had a noise just like yours, the owner got sick to death of taking back time and again to Nissan Aldershot, who changed the belts, adjusted the tappets and finally they even changed the camshafts.
He part-ex'd it for a D40 with them, the car then got cleared out in the trade to a mate of mine who bought it.
He changed and tried all sorts to get rid of the noise, right from the start I suggested he drop the sump and look at the big ends, but having many years spanner experience he was convinced that because it didn't sound like big end wear, it couldn't be this.
Eventually after much wasted time, frustration and head scratching he had nothing left to try or to loose and dropped the sump.
What did he find??
No. 3 big end completely b******d, worn right out, so far in fact that he had to have the crank ground to remove the scratches on it and go oversized.
I am not saying this is your problem, just giving you the benefit of past experiences.
I am sure many owners on this site will agree, that when the ends do go on the YD25 engine, they do NOT knock, but tend to give a tinkle/rattle just like a top end problem.
If you are going to strip parts of it down for this noise and intend to keep the car, you may as well do the ends, bolts and 'O' ring anyway?
Good luck, let us know what you find,
Chris

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 Post subject: Re: engine
PostPosted: Tue Feb 17, 2009 12:04 am 
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Ticking over
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Joined: Sun Feb 08, 2009 11:09 pm
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Location: mid cornwall
thans for the info chris. i will have to have a look at them. Today when cleaning the top timing cover i found that the timing chain has started to wear away the cover and chewed the guide that runs down the side of the cover. I dont no if this could be signaling that the timing chain tensioner has lost its tension. i work in a ford/iveco commercial garageand i no that transits have this problem all the time. i think it will be worth checking the big ends but it has done 175000 miles so it could be out of the trouble some area. anway thanks so much for the advice. edward
P.S i will post the pictures ofthe cover when i get time. :mrgreen:


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 Post subject: Re: engine
PostPosted: Tue Feb 17, 2009 12:43 pm 
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I'm now in 4th gear with power to spare!
I'm now in 4th gear with power to spare!
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Joined: Fri Jun 29, 2007 1:26 pm
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deffo agree with chris on this. I have had 2 nav engines let go and on both occasions there was no tell-tail "big eng knock" warning - both just tapped like rough tappets would sound

regarding the timing chain tensioner if i remember right there was a recall for ths?


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 Post subject: Re: engine
PostPosted: Tue Feb 17, 2009 11:07 pm 
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Fully run in and going strong!
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Joined: Wed Feb 11, 2009 12:16 am
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Location: Winkfield Berkshire
Have to agree.
I've have had this noise for some time and lubricating belts etc just prolongs the noise comming back.
I've got so sick of it and the worthless letter from Nissan I bit the bullet today and dropped the sump to find this

Image
Image
Image

As you can see No3 Big End bearing is 'shot' and the rest are begining to 'pick-up' so atleast I've saved myself the misery and cost of No3 con rod making a bid for freedom.

Carry out the 'mod' as per Chris's original post........you know it makes sence.
It will cost hundreds instead of thousands, even a scrapped car.

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 Post subject: Re: engine
PostPosted: Thu Feb 19, 2009 6:26 pm 
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Ticking over
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Joined: Sun Feb 08, 2009 11:09 pm
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Location: mid cornwall
thanks for the info. ive now come to the conclusion after checking the belts that it is the shells. because of the milage of the engine i have managed to find a second hand engine with lower miles. i have started removing the engine so if anyone wants an engine for spares or parts for their own engine just email me. before i put this other engine in i am going to change the bottom shells. does anyone no if there are more than one size or is there just a standard size. regards edward


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