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. . (01 Nov 2019)
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Can anyone ID this noise??

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28 Aug 2019 10:08 #212774 by gilburton
It's only when cold and between 2/3000 revs and disappears when warm.
It seems to get louder on the exhaust side in the video??
I had a new exhaust fitted a couple of months ago and it has been ok so far.


I started off high and worked my way down ever since :-)

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28 Aug 2019 10:41 #212775 by Spoofa
Replied by Spoofa on topic Can anyone ID this noise??
Take the heat shield off when it's cool and try again

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28 Aug 2019 11:28 #212779 by Lambert
Replied by Lambert on topic Can anyone ID this noise??
That's fan catching on something given the frequency and as it gets up to temperature and isn't being driven so hard it isn't able to flex enough to catch what it does when cold.

Dreadnaught (black 2011)

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28 Aug 2019 11:54 #212781 by gilburton
Well it's not the manifold heatshield and the new exhaust rear box doesn't have one.
My first instinct was that it was the fan but it appears to have enough clearance all round and I can't physically see anything and I have removed the shroud as well.
It's got that bicycle spoke type noise to it.
Just to make sure when it cools down I may try removing the fan and see what happens when it revs(by hand) and report back lol

I started off high and worked my way down ever since :-)

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28 Aug 2019 12:34 #212783 by gilburton

Lambert wrote: That's fan catching on something given the frequency and as it gets up to temperature and isn't being driven so hard it isn't able to flex enough to catch what it does when cold.


it's not the fan. Removed it and the noise is still there.
While i was messing around the noise seems to be coming from the power steering /aircon pump area ??
My next thought was a belt but I can't see anything just looking at them so tomorrow I'll take them off and have a look.
I might just change them anyway as I know they are way past their best. The Jimny has done 87000.
I don't suppose there is any reason to suspect any of the pumps is there?? Although it's a regular noise it almost sounds like a ball bearing or check valve rattling??
Is there anything to check on the pumps while I have the belts off?( assuming the noise stops)

I started off high and worked my way down ever since :-)

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28 Aug 2019 14:23 #212785 by gilburton
I think I've found the problem. I believe the crankshaft pulley is on the way out.
I was running it checking the belts and I noticed the pulley was not running true. I took off the belts and the noise is gone!!
I assume when cold the alternator etc is loading it up so it was complaining until warm. I could do with a couple of belts anyway as they are cracking in the grooves so I'll get the pulley off tomorrow then see about getting another.
Anyone know of where to get one and is there anything to look out for with the aftermarket ones??
Not too bothered about longevity as it's getting on a bit now so I might change it in the next year or so.
At least the problem is easier to solve than the gearbox I had to get rebuilt lol

I started off high and worked my way down ever since :-)

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28 Aug 2019 15:16 - 28 Aug 2019 15:19 #212787 by gilburton
Parts ordered from Martin so I'll get on taking the radiator out as I don't want to damage it lol
I've got a DIY 6ft breaker bar with a 1/2" socket drive welded on so that should do it lol
I originally made it up for removing drive shaft nuts on fwd cars as they are also on tight!!
Then I'll sit back and await the goodies.

I started off high and worked my way down ever since :-)
Last edit: 28 Aug 2019 15:19 by gilburton.

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28 Aug 2019 16:28 #212789 by Daniel30
Replied by Daniel30 on topic Can anyone ID this noise??
Glad you tracked it down... Well done and good luck :)

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28 Aug 2019 18:41 #212792 by Lambert
Replied by Lambert on topic Can anyone ID this noise??
^^^^this ^^^^^ Persistence is a virtue. A 6ft bar is probably ideal or it's going to fight you.

Dreadnaught (black 2011)

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31 Aug 2019 12:57 #212913 by gilburton
All sorted. THanks for the parts Martin almost as quick as Amazon lol
Yes it was the crank pulley delaminating so I got to it in time and also fitted new belts while I was at it.
You can see where it had been rubbing on the crankshaft seal housing but no damage.

I started off high and worked my way down ever since :-)
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31 Aug 2019 15:06 #212917 by Daniel30
Replied by Daniel30 on topic Can anyone ID this noise??
Well done nice and quiet now :)

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31 Aug 2019 15:14 #212918 by gilburton
It certainly is I could push the inner using my thumbs so it wasn't far off coming apart and the noise was a warning.
Maybe the "noise" video is another one for the archives lol

I started off high and worked my way down ever since :-)

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