1KZ-TE Engine Vibration

[Shayne]

I have felt this for a long time but have asked for many second opinions and nobody can feel it . I got up this morning to find a note from the mrs "i don't know whether its me or not but i feel your truck vibrates too much"

I don't know whether this indicates its getting worse (though i feel it is) and to be honest i don't know where to start looking for what .

There is no flexi joint in the exhaust but the exhaust was fitted for a long time before the vibration started .
I have removed the air filter to see if it makes a difference and it didn't .
I have been meaning to go through and clean the fuel tract to avoid the common fueling issues with the 90 series but haven't yet but even now i'm thinking the normal indication of fuel problems is loss of power and i haven't lost power at all .

The best mechanic i know has been blind for 30 years and he says it sounds sweet (if the main dealers diagnostic machine says no and he walks in and says yes they will fix it , he is well known locally)

So the only thing i can think of is injectors but i don't have enough knowledge to make that call and i'm sure 90% of garages would just say yeah you need to change them all then charge me a grand for pouring a bottle of redex in .

I have no idea about injectors or how to test them and i don't have time to go around the mulberry bush so my current thinking is it will have to wait another few thousand miles until we return from Romania .

Any thoughts appreciated .

 

[stumog]

Hows the engine and gearbox mounts?
chap in work have a bad vibe on his G wagon turned out he had fitted a new altinator belt that was just to long and the altinator rubbed on the sterring shaft. Just have a think what could be touching the engine.
With the engine running try moving it about to see if it the vibes stop.

 

[Shayne]

Food for thought Stu i had never noticed it can be felt through the steering wheel so i will be crawling under for a look just as soon as i've had my fix of coffee .

I have just returned from a chat with an injector specialist , great chap claimed my injectors with 120k on them are due servicing whichever way you look at it but his advice is not to bother and save my money Instead he said i should do a Forte engine flush and bring it back so they can disconnect the fuel tank and run the engine on cleaner for a couple of hours and for 80 quid i'm up for that as it's something i've been meaning to do the hard way for ages anyway but every suitable time seems to arrive when i have a full tank - same today

It shall be done though and there is no point unless i clean the tank out first so suggestions of things i might want to order before removing the tank ?

Oh and its not the mounts because it can't be felt while touching the wing even if the bonnet rattles like a washing machine (top mount intercooler)

 

[Umar]

Does the vibrating happen while driving or in idle or both?

 

[Shayne]

Its fine while driving and trawling back through my very misty memory i turned up the idle revs about a year ago to smooth it out , just checked now and she idles about 700rpm

 

[StarCruiser]

I was told injectors or a valve. Had the injectors done and it goes better but still got the vibes.

 

[Shayne]

The guy i spoke to fired through possibilities at a phenomenal rate but ultimately decided my truck is running too well to justify the expense of invasive tests he reckons one cylinder dirtier than the rest would do it , a carb build up making one piston work harder than the rest . Not overly keen on the theory myself but coupled with the newly discovered fact i have been overfuelling for quite some time and as i want the fuel system cleaned regardless , which happens to be the same cure if indeed a dirty cylinder is the problem what have i got to lose 80 quid won't put me in the poorhouse .

Come to think of it the egr was blanked before i bought the truck , does that go to one particular cylinder ? i would have put egr cleaner through it before blanking . Maybe i will anyway it can't hurt even if i haven't got an egr valve .

 

[Beau]

The guy i spoke to fired through possibilities at a phenomenal rate but ultimately decided my truck is running too well to justify the expense of invasive tests he reckons one cylinder dirtier than the rest would do it , a carb build up making one piston work harder than the rest . Not overly keen on the theory myself but coupled with the newly discovered fact i have been overfuelling for quite some time and as i want the fuel system cleaned regardless , which happens to be the same cure if indeed a dirty cylinder is the problem what have i got to lose 80 quid won't put me in the poorhouse .

Come to think of it the egr was blanked before i bought the truck , does that go to one particular cylinder ? i would have put egr cleaner through it before blanking . Maybe i will anyway it can't hurt even if i haven't got an egr valve .

Blanking off the EGR shouldn't affect anything. Here's how my engine sounds at idle - https://www.youtube.com/watch?v=47TEQibmfsM - I actually replaced that engine and my new one runs even quieter and smoother.

You could clean the engine yourself by drip feeding some water into the intake via a vacuum tube. Check youtube for how it's done - "Steam cleaning your engine". I kinda doubt it's that but it won't cost you anything to do so and is beneficial for the engine anyway!

 

[Shayne]

I was thinking the carb build up egr causes will not be removed by simply blanking it and a tin off wynns egr cleaner shot through the intake is harmless even if it proves unhelpful .
Can't help wondering about my turning the fuel all the way down yesterday , that in itself could be the cause but i've been bugged by the same symptoms for quite some time though nobody else could feel it . I could just turn up the fuel and tickover revs to hide the problem but i would rather solve a minor problem now than bigger problems later .

 

[StarCruiser]

Ok, those engines don't have dynamic balancers do they? Like the Shoguns?

 

[Shayne]

Don't think so no proper old school the 1kz

 

[Beau]

Nope, no harmonic balancers on these engines. The EGR does cake the intake manifold a lot, but I still don't see why this would cause engine vibration...

 

[Shayne]

It was just something that occurred to me while wondering about the injector specialist saying "dirty cylinder maybe , crap around the piston ring" .

 

[StarCruiser]

By 'dynamic balancer' I mean shafts with weighted lobes (a bit like crude cam shafts) running either side of the engine and spun with the engine by a timing belt. Wo betide the Shogun owner that didn't change both belts when the time comes as the broken balance belt could takeout the cam belt.

This is not the same as the rubber centred pulley found on some engines to smooth out crankshaft vibrations.

 

[Shayne]

Hmm quick google suggests it has a harmonic balancer which is the same thing . Or is it ? Just looking at vids which sparks a memory of the experts mate pointing down there and opening his mouth only to get a look that said shut it from the expert .

 

[StarCruiser]

If you have one cam belt you don't have them. If you have two belts, one behind the other, then you have dynamic balancers. If the belt goes, the engine vibrates…a bit. If you're unlucky, it gets munched into the cam belt.

 

[BobMurphy]

There are two Balance Shafts in the 1KZ-TE motor, but they are gear-driven in behind the timing belt case - the fuel pump is driven off the N/S one.

Unlikely to go wrong (unless you have caned the engine to death - but then the diesel injector pump wouldn't be working either ).

Bob.

 

[StarCruiser]

Thanks Bob. In that case, we can rule that theory out. [emoji4]

 

[steve allard]

How about the flywheel????????

 

[StarCruiser]

How about the flywheel????????

Ahh, that's a thought. Are they dual mass on that engine?