Friday, Dec 11, 2009 at 20:58
Are you allowed to quote yourself on this
forum :)
Here is something I cut and pasted from a previous thread (slightly altered for this thread) ...
The "blow up" problem that a few members on other forums enjoy blowing out of proportion (pardon the pun) can be typically contributed to a faulty MAF sensor.
This is not a "Nissan" thing, it is the same on all high tech diesels that do not have an EGT sensor feeding information back to the ECU.
Prevention is always better than the cure so by installing EGT and boost gauges, we are able to see if ever the electronics are not working correctly and we are able to catch all problems (except real mechanical ones that cannot be prevented with these gauges which are rare) before it causes damage to the motor.
The challenge is really to advise all who have these high tech motors to install the two gauges - then keep on enjoying the truck...
Another thing that we should all be weary of is the implementation of EGR on these type of motors. EGR is not bad per say but when mixed with blowby oil, the exhaust particles turn into goop and slowly block the intake manifold which is very bad for a diesel.
There is a simple fix for this as well, install a good quality blowby catch can. If you have had your vehicle for a while, then I would suggest that a clean of the intake manifold would also be required (throttle body and inlet of the intake manifold can be accessed and cleaned without too much difficulty).
The 3ltr motor is a good design and members from another
forum that have striped them down after 260Ks have found the internals to have minimal wear, the problem was a hole in the piston due to a failed MAF sensor:
"Just my thoughts from what I found when I pulled mine down after the problem
at 263,000K
wear in
bore - too small to measure
twist in head - less than 1/2 thou
intake and exhaust manifolds also less than 1/2 thou twist.
big ends - not run in yet. Numbers still readable on shells.
mains - identical with the new ones, thickness, ovality and yaw. no wear there at all.
So with new engine
australia pistons, and a
weather eye being kept on the maf (with a spare in the glove box) I reckon she's good for at least 1,000,000 K "
As you can see, the motor is good but the electronics are what can let it down - by installing a boost and EGT gauge, it won't get the chance.
Here is a link to a page that shows
Site Link what Ks are possible with this motor.
Cheers,
Whitie
AnswerID:
394674
Follow Up By: Member - Kroozer (WA) - Saturday, Dec 12, 2009 at 01:55
Saturday, Dec 12, 2009 at 01:55
So one eye
on the road and one eye on the gauges is that what needs to happen. There is still that element of danger involved because it comes down to how often you look at the gauge. Peope install water temp alarms now because to many cars have cooked because of the fact that they werent watching the temp gauge, now you add two more gauges to that, real recipe for a mental breakdown. Supposed to be able to enjoy your car not have to watch over it like a kid.
Somebody should come up with a way of making all this electronic and perhaps have alarms installed or something to alarm the driver of potential damage or unsafe levels. This would then make it a foolproof method and if then , it eliminates the possibility of a blown motor and expensive repair bill, im sure then people would start to believe what is now considered impossible.
And then the price of the Toyotas might drop because people would have faith in the cheaper 3 litre Nissan again. Then we would all be happy.
FollowupID:
663061
Follow Up By: whitiepatrol4x4 - Saturday, Dec 12, 2009 at 15:42
Saturday, Dec 12, 2009 at 15:42
Hi Kroozer, good point. There are a lot of people ithat have installed EGT gauges that can be set to alert the driver when the set EGT has been reached. These gauges seem to be the same price if not slightly cheaper than the big name brands.
No surprise that they can be purchased from a member of the Patrol
forum who imports them :)
Cheers,
Whitie
FollowupID:
663119