Can anyone diagnose this?

F

fil_gtir

Member
I have posted a video below of my car from a cold start.

http://video.freevideoblog.com/Player.aspx?fileid=0C8D614D-F836-4FBA-A7A1-604DF42EC517

Have a listen, cos at around 15 secs a whirring rattling noise appears, and then fades off after a couple of minutes. You can also hear it on the overrun when i rev the engine. It does this every cold start, and has done for about 3 years.

Its been run with no belts on it and it does the same, which rules out alternator, water pump (new anyway), power steering. Air con been removed. Its also had a new chain tensioner. And when taken to Nissan they said it sounded like some cam squirters blocked, which they cleaned out for me (200 quid), only for it to be exactly the same.

Any help appreciated.

Phil
 
creedy

creedy

New Member
have you cleaned out the oil presure switch in the sump? i think its called that anyway.
mine doesnt pick up oil presure rite away.


if not that mite be ur big ends :?
 
F

fil_gtir

Member
Oil pressure is fine, its builds up instantly, and the noise doesnt appear to be connected to the oil pressure gauge, if you know what i mean. It takes approx 30 secs from cranking for the noise to appear.

Its been doing it for 3 years, 10000+ miles.

If you ask me, I would say it also sounded a little whiney at high revs (once warmed up). Like you can hear the belts or chain rotating.

Cheers

Phil
 
OZ-Racing

OZ-Racing

New Member
Bloody annoying isn't it :evil:

Mine's done this for ages now. It stopped for a while and now it's back :roll:

Sounds exactly the same as yours. It goes away once warm.

Well at least I know what it isn't now, only problem is finding out what it is.

Please let me know if you work it out :? It does my head in :(
 
L

LoXy

Guest
i think it could be the chain rubbing against the cover. try a different oil
 
OZ-Racing

OZ-Racing

New Member
I will ask people at santa pod tomorrow when I start mine up at the end of the day, should be cold enough by then :? (unless I cook it up the strip :wink: :roll: )

Should get a few expert opinions then :)
 
OZ-Racing

OZ-Racing

New Member
turblio said:
Mine used to do that before the rebuild doesnt anymore wonder if its the water pump?
Click to expand...
Frank, you can have a listen to mine tomorrow if you like :D

He said he ran it without the belts and it's a new water pump anyway :? :wink:
 
F

fil_gtir

Member
Hey OZ I am going to the pod this weekend, we should get together, see if it is same noise. I will be on me motorbike tho. Too nice weather.

Oil used in Silkolene Pro S 10w40, also tried Castrol RS. Both the same.

On a side note, nissan told me to stop using the Silkolene as it was sludging. So i flushed and put in Castrol RS, exactly the same.

Phil
 
D

Dan_GTiR

New Member
Mine makes that noise when cold, disappears after about 3-5 minutes I've never managed to find out what it is though, so I just left it.

Dan. :)
 
S

stugtir

New Member
I had this noise a while back and i thought it was the chain tensioner! iso i changed it and there was no difference! :roll:

It turned out to be the long bolt that attaches the alternator to the block!! :roll: :oops:

what had happened is the previous owner had wound the nut on and stripped the thread off the bolt somehow :? and as a result it had come off, and this is what was causing the rattleing!! :wink:

stu
 
topcat

topcat

New Member
i visit brum quite alot.. if u want me to have a listen.. leave me a pm..

btw.. there is a modified guide and tensioner available from nissan..

Dunc
 
F

fil_gtir

Member
New chain tensioner (new model) already been fitted.Where are the Cam Chain Guides?

Could it be the chain itself, worn?

Cheers

Phil
 
J

Jonny H

Guest
On a side note, nissan told me to stop using the Silkolene as it was sludging
Click to expand...
Ive been using silkolene for the past 3 changes......i thought this was supposed to be one of the best/popular ones to use? :?
 
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