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Premium Member
2016 CRD wagon
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1,543 Posts
Discussion Starter · #1 ·
Hi everyone,

Relatively new to this forum but there's some great info within. Well done to all who participate.

I have a 01 zd30 patrol which currently has a very rough idle. It doesn't always display problem at idle and runs smooth with the air conditioner on (ie faster idle). When it's idling rough it shakes the whole car and if left, the gearbox starts making a noise kind of like a worn thrust bearing. If you listen at the end of the exhaust its not a smooth even noise, its a noise like one cylinder isn't firing. There is also a slight jolt (becoming more frequent) when taking off (letting clutch pedal out) and between gear changes, feels sort of like freeplay in the drivetrain except that has already been taken up.

About 18 months ago I had the flywheel replaced by nissan and put a heavy duty clutch in. I'm almost certain that it is the dual mass flywheel responsible again and Mr Nissan is thinking down the same line.

For the people reading who haven't heard of this before the theory is that flywheel has a liquid or grease filled cavity between the two sections to act as a buffer against sudden jolts from the motor to the gearbox. If this liquid/grease leaks out there is no longer enough friction between the two plates to stop them from moving too freely. This allows it to "bounce" between the stops each way causing an out of balance effect on the motor. This is then worsened because it can "apparently" affect the timing of the injector pump whilst this is occuring.

Has anyone else suffered from the same problem/symptoms and if they have, was it expaind as the same problem or something different? I'm only going on what I've been told.

Also I'm led to believe that later models of this motor have a solid flywheel. If this is correct can anyone tell me if you can/can't put one on mine. I'm pretty sure you can buy none genuine ones but I remember reading in 4WD monthly a big advertisement from Nissan saying that the motor was designed for a dual mass flywheel and so should replace it with one. They even had a special price on the flywheel and clutch kit together.

Any/all feedback will be greatfully accepted but if your going to just bag the zd30, don't bother replying.

Look forward to hearing your responses

Cheers
 

bit cold out it seems
nissan
Joined
9,258 Posts
I have seen this happen to '00 and an '04 ZD30 manual.

Random rough idle. Its like it just gets itself into a harmonic sort of throb.

Never to the extent of what yours is experiencing though - so considering age it is most likely to be the flywheel starting to wear. Gearboxes both made that horrible loud noise towards the 100,000km mark - its fairly normal.
 

WOMBATDIFFLEXIA
Joined
161 Posts
Vmf

Its gunna be your VMF (variable mass flywheel ) that has reached its use by date. Check out other links on this forum and you will find heaps of info on supliers and/or symptons.:cheers:
 

Premium Member
2016 CRD wagon
Joined
1,543 Posts
Discussion Starter · #4 ·
Thanks guys for the quick responses and confirmation of problem.
This flywheel is only 18 months old which is a bit dissappointing!!!
I'll do some more searching for the suppliers.
I guess what I really want to know now is if I can successfully fit a solid flywheel with out any future complications?

Cheers:cool:
 

WOMBATDIFFLEXIA
Joined
161 Posts
trev zd30 said:
Thanks guys for the quick responses and confirmation of problem.
This flywheel is only 18 months old which is a bit dissappointing!!!
I'll do some more searching for the suppliers.
I guess what I really want to know now is if I can successfully fit a solid flywheel with out any future complications?

Cheers:cool:
As before Trev just check for threads re solid flywheel. Others have fitted them, they have a little more noise and vibration but it isn't anything to be concerned about.
 

Premium Member
2016 CRD wagon
Joined
1,543 Posts
Discussion Starter · #6 ·
Thanks for the reply Renden Park.
Have spent fair amount of time searching and reading thus far. Think I will go for the solid this time. Have made phone calls but being christmas period, hard to catch people at work. Am waiting on couple of calls back for quotes on just the flywheel as clutch was repalced with heavy duty version same time as last flywheel (bout 18 months ago).

Cheers:D

Trev
 

Registered
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In earlier ZD30 Patrols there was a known problem with them running rough intermitantly. Usually when pulling up to an intersection they would feel like they were going to stall. It was caused by the harmonics of the dual mass flywheel. The fix was to use Consult II to monitor the idle as you adjusted it at the ECU. Usually it only needed an extra 25-50RPM. It was not even noticable on the tacho. We have done this rework & had a lot of success altho occasionally we have found other things to be at fault such as the flywheel but only rarely
Thanks
Terry
 

Premium Member
2016 CRD wagon
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1,543 Posts
Discussion Starter · #8 ·
GQ banger said:
In earlier ZD30 Patrols there was a known problem with them running rough intermitantly. Usually when pulling up to an intersection they would feel like they were going to stall. It was caused by the harmonics of the dual mass flywheel. The fix was to use Consult II to monitor the idle as you adjusted it at the ECU. Usually it only needed an extra 25-50RPM. It was not even noticable on the tacho. We have done this rework & had a lot of success altho occasionally we have found other things to be at fault such as the flywheel but only rarely
Thanks
Terry

Thanks for the reply Terry,

One person brought this up the last time I had trouble but when I asked around at a few other people and dealerships they all blew this suggestion off as a highly unlikely. Hence they changed the flywheel.
I was unaware that the idle speed could be adjusted. The fellow who brought it up first just mentioned that some of the early model 3 ltrs required some reprogramming. I guess that is what he meant.
I have thought for quite a while now that it does idle low (only just above 700rpm). After talking with a mechanic with 17 years of Nissan exp today we decided to wait on the flywheel exchange until we had ruled out a few other possibilities. I'll take this idea to him and see what he has to say.
This is what is so great about forums like this. You get to make a well informed decision about your vehicle instead of just stabbing in the dark at could be's or maybe's.

If anyone else has something they may think is relevant, feel free to post.

Thanks to all.

Cheers

Trev
 

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Hi trev zd30, and those who've replied to trev's post. Not trying to hijack this thread (pardon me please) but I've been reading the symptoms that trev's been experiencing with his 'trol. I'm not sure, but it looks like that's what I'm experiencing.

My thread: http://www.patrol4x4.com/forum/showthread.php?t=25010

This morning, while warming up the engine in "heat" mode, I noticed the "misfiring" again. This time, maybe because my door was open, I seemed to have heard a clunk on the undercarriage. Seemed to me, the car wanted to shift but missed the gear. I likewise noted that the transfer gear shift shook.

Am I looking for the problem of my 'trol in the wrong place - FUEL DELIVERY? Do I have the same problem as trev?

BTW, I haven't had time to visit a diesel specialist yet, so I haven't ruled out fuel system as the problem.

Thanks!

Mario
 

Premium Member
2016 CRD wagon
Joined
1,543 Posts
Discussion Starter · #10 ·
update

Hi guys.

Firstly thanks to everyone who's given feedback on this issue
Thought it time to update this thread now.

I've been to Mr Nissan and they found the nissan bulletin giving the same info that GQ banger gave (thanks for that).
I got to sit in the car while the mechanic did the job. It was really quite easy. He unscrewed the computer from its mounting points and while consult II was monitoring the idle revs (it was idleing at 750rpm) turned the screw under the sticker that does'nt have nissan printed on it. As he turned the screw clockwise the idle reduce to about 700rpm and then increased up over 800rpm.
We set at 800rpm and remounted the computer. The car now idles so smooth!!!! It also has less lag at the lights.

Having said all this I'm not sure if it has fixed the actual problem or just masked it, but will monitor and get back to you all with the true result.

Cheers
Trev

PS. Does anyone know how to access these Nissan bulletins which can hold so many secrets?? Talking to the mechanic when he did the job and he said most of the dealerships wouldn't know about these types of fixes unless they had actually gone looking for them because Nissan doesn't advertise that they are available. He also mentioned that my car (an '01 model) is now old and the dealership are so busy trying to keep up with the new stuff that they just don't care for the older vehicles
 

Premium Member
2016 CRD wagon
Joined
1,543 Posts
Discussion Starter · #11 ·
update

G'day all.

Thought I'd post a quick update.

Since the idle has been increased to 800rpm the symptoms are definately less obvious but I believe the underlying problem is still there. I still get times where the motor will go into the "harmonic throb", as Yom described it, but to a lessor extent and less often. Definately more obvious in the warmer climate than the cooler (Vic) climate.

Guess I'll eventually have to put a solid flywheel in but for now it should be right.

Trev
 

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nissan
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883 Posts
Trev,

Even though your dual mass flywheel isn't very old, it probably cops a bit more wear than a standard vehicle will. With the combination of your large caravan, bigger tyres, chip and the diesel-gas kit, it may be contributing to premature wear.
Something to think about.

When you back down this end of the world??
 

Premium Member
2016 CRD wagon
Joined
1,543 Posts
Discussion Starter · #13 ·
I think ur right. I love that extra power when the gas is on!!!!!

Be back down your way at he end of the year all going well. Will drop in for a cuppa and/ or other beverage.

Cheers

Trev
 

Registered
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Now that I have read this post, i also have the occassional rough idle, Mr Nissan just put it down to needing an oil change which was 4000 over due, not only did I change the oil but all the other fluids as well.

Still there and idle speed is low.
 

Registered
nissan navara
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109 Posts
Dual Mass Flywheel onn CRD

Does the CRD have this wonderfull little invention that seems to give some trouble. Up for the first service and I noticed that old rough idle after restarting, gave it a blip and it stopped, hasn't done so since.
 

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nissan
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24 Posts
My wagon has the same random rough idle, I to just blip the throttle and it goes away. glad to see im not the only one with this problem as i recently rebuilt the engine and have not driven another 3lt so I have no reference. Brought the wagon blown up before christmas
 

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nissan gu
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3 Posts
Hi guys been reading some of the post . i have a 01 zd 30 patrol i had same issues. im a mechanic by trade and work for a well known diesel mechanic. i spoke to him about rough idle. he suggested i use 50 mls of two stroke to a full tank of juice. i dont know if it was coincidence but after about 80 ks. i could pull up at lights she idled smooth. i add two stroke oil every time i fill up
 

Registered
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7 Posts
update

Hi guys.

Firstly thanks to everyone who's given feedback on this issue
Thought it time to update this thread now.

I've been to Mr Nissan and they found the nissan bulletin giving the same info that GQ banger gave (thanks for that).
I got to sit in the car while the mechanic did the job. It was really quite easy. He unscrewed the computer from its mounting points and while consult II was monitoring the idle revs (it was idleing at 750rpm) turned the screw under the sticker that does'nt have nissan printed on it. As he turned the screw clockwise the idle reduce to about 700rpm and then increased up over 800rpm.
We set at 800rpm and remounted the computer. The car now idles so smooth!!!! It also has less lag at the lights.

Having said all this I'm not sure if it has fixed the actual problem or just masked it, but will monitor and get back to you all with the true result.

Cheers
Trev

PS. Does anyone know how to access these Nissan bulletins which can hold so many secrets?? Talking to the mechanic when he did the job and he said most of the dealerships wouldn't know about these types of fixes unless they had actually gone looking for them because Nissan doesn't advertise that they are available. He also mentioned that my car (an '01 model) is now old and the dealership are so busy trying to keep up with the new stuff that they just don't care for the older vehicles
Where is the computer mounted?
 
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