2006 R51 Pathfinder Issues - Nissan-Navara.net
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post #1 of 9 (permalink) Old 09-06-19, 07:25 AM Thread Starter
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2006 R51 Pathfinder Issues

Hi Guys,

I've recently bought a 2006 R51 pathfinder 2.5 Diesel Automatic which we're really enjoying except for a few issues. It has 135000kms (about 80000 Miles)

1. Cutting out on hard acceleration - the vehicle starts easily, even when left for a few days, however whenever you try to accelerate hard the engine dies and there is a hissing sound too. After this it is back to normal until you accelerate hard again. I'm thinking possibly pressure relief valve or SCV? Apart from this it sounds fine and has good power

2. Whining Noise - Seems to do this when stationary and when driving and rises and falls with engine revs. This morning I removed one of the intake hoses, post turbo, and found some oil in there. Not gushing out but enough to cause a few small drips.

Any Ideas?

Cheers
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post #2 of 9 (permalink) Old 09-06-19, 10:03 AM
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Could be SCV or boost solenoid, but I'd check hoses from turbo, and the intercooler, for leaks first. Do you have an ODB dongle to read data with?

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post #3 of 9 (permalink) Old 09-06-19, 10:26 AM
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For the running issues, read this https://www.nissan-navara.net/27-que...ng-issues.html paying special attention to the fuel filter.

The whining could be a few things, the belts and their tension is often a culprit.

That amount of oil in the intake duct is normal.
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post #4 of 9 (permalink) Old 09-06-19, 10:43 AM Thread Starter
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Cheers, I'll run through all of the intercooler hoses.

I don't have an OBD2 dongle but would like to buy one - any recommendations?

Currently I have a V Gate Maxiscan VS 890 but it doesn't display boost or common rail pressure
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post #5 of 9 (permalink) Old 09-06-19, 10:45 AM Thread Starter
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Originally Posted by landmannnn View Post
For the running issues, read this https://www.nissan-navara.net/27-que...ng-issues.html paying special attention to the fuel filter.

The whining could be a few things, the belts and their tension is often a culprit.

That amount of oil in the intake duct is normal.
Thanks Landmannnn - I'll try removing the belt and running the engine for a few seconds and check out the link
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post #6 of 9 (permalink) Old 09-06-19, 11:12 AM
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Originally Posted by willowthehat View Post
Thanks Landmannnn - I'll try removing the belt and running the engine for a few seconds and check out the link
When you do that, spin the idler/tensioner pulley by hand, the (cheap to replace) bearings tend to give up.
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post #7 of 9 (permalink) Old 09-06-19, 08:54 PM
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Your problem does sound like a pressure release valve or suction control valve!
The whine could be the start of the alternator clutch pulley failing? A few weeks ago i had a whine (sounded like a low volume supercharger) which rose and fell with the revs and a week or 2 later it changed to a "click click" noise which i was able to locate as coming from the front of the alternator!
Ive changed the alternator today and the noise has gone!

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post #8 of 9 (permalink) Old 10-06-19, 08:23 AM Thread Starter
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When you do that, spin the idler/tensioner pulley by hand, the (cheap to replace) bearings tend to give up.
Thanks for the advice I'll check them too
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post #9 of 9 (permalink) Old 10-06-19, 08:27 AM Thread Starter
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Your problem does sound like a pressure release valve or suction control valve!
The whine could be the start of the alternator clutch pulley failing? A few weeks ago i had a whine (sounded like a low volume supercharger) which rose and fell with the revs and a week or 2 later it changed to a "click click" noise which i was able to locate as coming from the front of the alternator!
Ive changed the alternator today and the noise has gone!
Now you mention this if I hold the revs at a constant speed the noise seems to disappear - possibly this points to the alternator pulley clutch as once engaged the noise fades?
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