[s.turbos]

Hi to all new on here.
i have a 04 navara with 95k on it
it runs like a dream had the new short block fitted by nissan
at 60k. i got the pickup last may with 84k every thing is good with it
no knocking funney noises i have been reading on here about the upgrade
so for the sake of it i did this in september 2012 with 89k just to be safe
the shells i removed was good no wear the truck as run sincs again like a dream
it as now just done 95k.
last week when all the smow was here and it was very cold
i noticed a little noise like a kicking it
even sounds like a small ball bearing in a tin when you shake it around
i sounds like its from the fuel pump side its not bad and not there all the time
it only came last week when it was snowing
i just need to know if it has happend to anyone else
it is not the fan belts i know about them. is it diesel knock an injector
the top chain tensioner seems fine could it be the bottom end
can a bottom end go if its had the billcar shells rod bolts and oil tube in
in such a short time
it revs fine and does not seem to knock when that little noise is not there the engine
sounds very nice no smoke i need help please im starting worry its the bottom end??

 

[bornpompey]

mine does the same, from cold, especially when its wet or damp outside. I sprayed WD40 on the belts and it disappeared!

Try it next time, might just be worn belts. I bought Gates ones for 24.00 the set..........OEM ones are 78.00 + vat :-(

Let us know, BP

 

[s.turbos]

Hi and thanks for your reply
its not the belts i have changed them
it still did it so i ran the truck with them off it still did it
can it be a injector? or even worse can it be the shells??
i have neve had a problem with them even before i did the upgrade
the truck never had a knocking noise and after the upgrade
the truck has run 5k with not a 1 noise till last week
its like a ball bearing in a tin noise is this diesel knock?? can anyone help please?

 

[lookskyward1]

Use a long screwdriver as a stethoscope, and try to identify the exact location of the rattle.

It's going to need a strip down of some sorts to locate and rectify the problem, even if it's just for your peace of mind.

Good luck

 

[s.turbos]

hi yes thanks
but does anyone know if tthis is an injector sound

 

[Phoenix]

The injectors do rattle sometimes on these, could be chain also or clutching at straws, what if it was being starved of oil? Bad oil circulation also gives that slight tink tink/rattle sound.
Oh & dont wory about your shells, if Billcar has done it then its solid :thumbright:

 

[bornpompey]

sorry did not read all your post........didn't see about the belts ops

Just a thought, when was the last time you did a filter and oil change. I had a sinmilar noise develop on my Discovery 3 a couple of months back when we had our first real cold snap down here........my Indy had put a pattern filter on it (cooper) and it made the oil light stay on longer too! I got it changed for an OEM one and it cured it......... :confetti

Does it only do it from cold?
Does the noise disappear when revved?
Does the oil light stay slightly delayed on?

You should be able to pin point the noise as suggested by using a long thin probe to your ear........metallic noises resonate.

Injectors can knock when they begin to "hose" instead of spraying correctly.........but you normally wil see black smoke on revving.

BP

 

[s.turbos]

it was only serviced last week
i do it my self i do go to nissan a buy all the genuine oil filters to do it
before the date and mileage the engine is good even when you take the dip stick out the oil is
golden and not black it has run 100% since i have owned it. even now the engine sounds like new
just that little noise it really does sound like a ball bearing in a tin rattly sound not very loud
and yes i quietens down. im just scared to use it now i keep thinking its the big ends going
i did the bottom end my self the original shells i removed before putting in the billcar ones
were like new but i just changed it as of the horrors you here about the bottom ends on these.
this noise just came middle last week when it was very cold and loads of snow

 

[Phoenix]

Does the noise dampen down when it gets warmer?

 

[Highland navara]

Given the work that you have done on it, could you be hearing your altenator bearings? because you probably have a quiet engine there, as LS1 said using a long screwdriver as a stethoscope would tell you if it is.

Ian

 

[s.turbos]

i thought that also but as i removed the belts to see if it was still there when running
it was. so i cant be the alt as it does not run with no belts
had another look today just to make sure nothing has come off or vibrating
there is nothing seems to speed up when you rev it
its not like a bottom end knock but saying that every noise you get seems to come from there
can it be the shells? im so worried its done 6k on the bottom upgrade
not one noise til last week. has any engine after the conversion ever let go
does any one know of this?? ps thanks to all for the info so far

 

[chris vince]

NO upgraded engine has ever let go as far as I know, mine was the first over 6 years ago.
Have you checked the exhaust support brackets from the engine/gearbox to the exhaust pipe, these rust out and give a resonating ring.

 

[s.turbos]

is there anything else in the engine that these are bad for?
that can make that tap clattering noise
what symptems do you get say is a chain tensioner is weak or going are d22s bad for that
im just thinking of anything

 

[chris vince]

There was a campaign (Nissan's term for a recall) for timing chain tensioner breakage/failure, I have also seen the tensioner oil supply gallery partially blocked by sealant, this was an intermittant fault as the sealant moved about.

 

[s.turbos]

yes i had a look at this because i have even removed the top chain cover to see if the tensioner
was slack but everything looked ok the chain was tight i spun offer and saw the oil come out on the top of the chain like straight away
its like the noise is moving about like i say a ball in a tin i cant get my head around it

 

[lookskyward1]

its like the noise is moving about like i say a ball in a tin i cant get my head around it

You sound like you know what you are doing mechanically. I am really happy when up to my elbows in oily bits but when it is my vehicle, all reason seems to go out of the window. I think you may be having a bit of a panic like I do.

Your description of the noise may be closer to the truth. Is there a possibility there is a loose but/washer floating around in the sump?

 

[s.turbos]

thanks yes i do all my own work and will have a go at anything
and panic like you say then yes lol!!! it just one of them horrible noises
that you dont know what it is and you think its just going to go bang in front of you
and it does not sound like a washer/nut
like i say it goes with the revs when its ticking over you can here it
like diesel knock or a injector when you rev it it seems to go faster
you know like with the engine speed its not very loud and dont seem to bang like
a bottem end bearings that are shot dut it seems to be coming from there.

 

[wozizname]

thanks yes i do all my own work and will have a go at anything
and panic like you say then yes lol!!! it just one of them horrible noises
that you dont know what it is and you think its just going to go bang in front of you
and it does not sound like a washer/nut
like i say it goes with the revs when its ticking over you can here it
like diesel knock or a injector when you rev it it seems to go faster
you know like with the engine speed its not very loud and dont seem to bang like
a bottem end bearings that are shot dut it seems to be coming from there.

Mine makes a noise like that when it's very cold weather and I suspect it's thick fuel within the pump/injectors.
Maybe you've picked up some contaminated or dirty fuel. A dripping/leaking injector can also cause a knock/tapping sound (like detonation on a petrol engine) so maybe run through some diesel additive/cleaner to clean the injection system assuming the fuel filter's been changed.

 

[s.turbos]

yes will try that injector cleaner tomorrow
i hope it sorts it i dont fancy droping the sump off again
so from what im told is that once the bottom end has been upgraded
they dont go again??

 

[chris vince]

Get hold of some Forte injector cleaner, don't waste it putting it in the tank, pour it straight in the filter, start the engine, run it for long enough for it to reach the injectors (you'll know this by the exhaust smell changing), stop the engine, leave it 5-10 mins, start up again, run for a couple of minutes, stop and repeat as many times as you think is beneficial.
The aim is to keep fresh cleaner around the injectors to clean them up.