Who can help solve this mechanical noise

Submitted: Thursday, Apr 02, 2009 at 08:56
ThreadID: 67437 Views:2629 Replies:11 FollowUps:11
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G'Day all, this is a difficult one, loud random sreaching noise coming from my Navara.I shall supply as much detail as possible.

Vehicle is a 1999 Navara Dual Cab 3.2 diesel with 195,000km, engine serviced regularily, not much else touched though.

It sounds like a belt screaming, but its not, although it did start when I had a new set of belts fitted by local 4bie shop, its been back 3 times, belts are tight n they say noise not belts but want vehicle for a day at $80/hr to diagnose..... not happening.

I expect them to tell me whats wrong n how much to fix it, not charge me just to tell me whats wrong, so I shall do my own diagnosis, which i'm normally quite good at but this one has me beat.

I thought clutch release bearing, but clutch in / out has no effect.

Brakes on / off no effect.

Its not engine, as one day when doing it, I stopped engine and rolled along slow n noise still there, so rules out belts, which you'd swear it was.

Its totally random, i cannot recreate it at will yet, happens uphill / downhill, on RH bend, on LH bend.

Totally stopped n went away for about a month, so I gave up, now its back though.

Vehicle fine in all other areas except noticed occasionally a bit of a snatch when pulling away in first, like you let fot off clutch too quick, so maybe a clue there? or poss just a bit of transmission wind up and not associated.

4bie guy said poss tail shaft bearing or wheel bearing.

Any pointers appreciated.

Rgds

Ron

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Reply By: Ozhumvee - Thursday, Apr 02, 2009 at 09:07

Thursday, Apr 02, 2009 at 09:07
Check front brakes for a pebble stuck between disk and shield/caliper.
Jack vehicle up and put on stands so that driveline can be rotated by hand and try and locate noise while doing so.
Peter
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Follow Up By: Ron173 - Thursday, Apr 02, 2009 at 09:20

Thursday, Apr 02, 2009 at 09:20
I think thats gonna have to be my next step
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Follow Up By: Louie the fly (SA) - Thursday, Apr 02, 2009 at 11:25

Thursday, Apr 02, 2009 at 11:25
Good suggestion Peter. It could also (possibly) be the brake pad shield squealing. Grab a can of WURTH Brake Protection HT, a sprayable high temp brake assembly paste, and spray both sides of the shield with it, as well as the pins or whatever your brake assembly has. It worked on my car when I had a similar problem.

I was also going to say check the front passenger seat and rear seat for possible source of the squeal. Maybe it's just the missus & kids going off... lol

Louie
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Reply By: GoneTroppo Member (FNQ) - Thursday, Apr 02, 2009 at 09:20

Thursday, Apr 02, 2009 at 09:20
Had similar situation twice.

Once it was a bearing on a idler pulley on serpentine belt.
Second time a stuffed front propshaft universal.

AnswerID: 357619

Follow Up By: Ron173 - Thursday, Apr 02, 2009 at 09:31

Thursday, Apr 02, 2009 at 09:31
has a grease nipple on prop shaft might try greasing that too
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Follow Up By: Member - Phil G (SA) - Thursday, Apr 02, 2009 at 10:37

Thursday, Apr 02, 2009 at 10:37
I'll put my money on the aircond idler pulley since you first noticed it after a belt change.
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Follow Up By: Ron173 - Thursday, Apr 02, 2009 at 10:42

Thursday, Apr 02, 2009 at 10:42
cant be that I'm afraid, as it did it with engine off, but appreciate all angles of thought
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Follow Up By: Member - Phil G (SA) - Thursday, Apr 02, 2009 at 10:53

Thursday, Apr 02, 2009 at 10:53
Sorry Ron, I misread that bit.
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Reply By: Member - Doug T (NT) - Thursday, Apr 02, 2009 at 09:25

Thursday, Apr 02, 2009 at 09:25
Just seen on animal rescue last week where a woman's car had a cat stuck in the engine bay...LOOK FOR A CAT.

.
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Follow Up By: Ron173 - Thursday, Apr 02, 2009 at 09:31

Thursday, Apr 02, 2009 at 09:31
Hi Doug,

no no pussy in there!!
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Follow Up By: Member - Doug T (NT) - Thursday, Apr 02, 2009 at 09:33

Thursday, Apr 02, 2009 at 09:33
Bugga ...I'll pay you that one..

.
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Reply By: Grizzle - Thursday, Apr 02, 2009 at 10:48

Thursday, Apr 02, 2009 at 10:48
Some cars have shims in the front brakes that squeal when the pads are worn down to indicate they need replacing. Had a similar thing on a Pajero I had years ago and that was intermittent too. Worth a check.

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Follow Up By: Top End Explorer Tours - Thursday, Apr 02, 2009 at 18:46

Thursday, Apr 02, 2009 at 18:46
I recon your on the money, I changed my pads on Tuesday for the same reason.

Cheers Steve.
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Reply By: Leroy - Thursday, Apr 02, 2009 at 10:48

Thursday, Apr 02, 2009 at 10:48
Interesting how you expect a mechanic to spend time diagnosing a problem for free! So if he spent 6hrs diagnosing and repaired the prob, would you be happy? :)

Leroy
AnswerID: 357637

Follow Up By: Ron173 - Thursday, Apr 02, 2009 at 11:03

Thursday, Apr 02, 2009 at 11:03
obviously fired up a mechanic here.

in answer to question... possibly.

When I go to a 4 x 4 specialist, yes I do expect them to look at / take test run, and tell me whats wrong, they ARE supposed to be the experts, then I have no issue paying them to fix.

I am NOT giving them an open cheque book just to find the problem.

I was quite surprised when they said its not belts, and I asked what it was then, and they didnt know, I was expecting, yep thats a x / y /z it'll be about $$ plus xhrs labour to fit, not give us $600 and we will then tell you what it needs and how much.

I reckon if I go elsewhere I would get a diagnosis on the spot.
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Reply By: Member - Bentaxle - Thursday, Apr 02, 2009 at 10:56

Thursday, Apr 02, 2009 at 10:56
Ron Check fanbelt tensioner pulley. I had a similar problem on my 3LGU, the screech would come and go at random.
Mike
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Reply By: Volvo driver - Thursday, Apr 02, 2009 at 11:32

Thursday, Apr 02, 2009 at 11:32
had this problem with a VS commodore my son brought from a yard three weeks ago, we thought it was coming from the belt pulleys... as did the mechanic we took it to, who changed one of them ( the car yard was 2 1/2 hrs return trip away ) problem remained.. lost OUR money there ( pulleys and tensioning thingamebobs aren't covered by warranty anyway ).. rang the car yard.. they insisted that it would be just the fan belt.. we thought BS.. but went down anyway on the Saturday to get it sorted out,

they put a new belt on it..problem solved..has not made a squeak since,

maybe the belts they put on your's weren't the right ones for that same model?
AnswerID: 357649

Reply By: roger p - Thursday, Apr 02, 2009 at 17:34

Thursday, Apr 02, 2009 at 17:34
gday ron,
if the screeching noise is the belt grab a cup full of water and drizzle it over the belt while its spinning, just in one place will do,no need to drown it,it will silence immediately until the water is thrown off it it is the cause.
good luck roger p
AnswerID: 357697

Reply By: Member - Alanc - Thursday, Apr 02, 2009 at 23:49

Thursday, Apr 02, 2009 at 23:49
Hi Ron- Don't have an answer for you however I had a similar problem with my Daihatsu Rocky about six years ago. We had just done the GRR/ Bungles etc and were returning to Broome when I noticed this high pitched sound coming from under the car. It did not appear to be there all the time however you could hear it at low speeds. I diverted to Derby and with a local mechanic checked belts etc to no avail. Due to a short time frame we pushed onto Broome where I had it all checked again and as a bit of a stab in the dark had the universal joint replace- no change. I ended up having a very nervous trip back to Perth and continued to drive it around for another 12 months or so and never discover the cause although I seem to remember it did fade a bit with time - but then again my misses tells me I'm going deaf.
AnswerID: 357761

Reply By: Ron173 - Friday, Apr 03, 2009 at 08:19

Friday, Apr 03, 2009 at 08:19
UPDATE.

Thanks for all replies, however its not belts in any way, it did it while rolling with engine off, so its running gear or transmission.

The brake pad post above is worth a look, thanks.

I noticed this morning it started squealing and by lifting off accelerator a smidge and back on stopped it.

Then went thru a culvate (dry) and it squealed as the vehicle reached the bottom, stopped once out of it, so something flexing in suspension brought that on, but suppose could also point to the universal on prop shaft.

This is driving me nuts, but i appreciate the help, I'm sure I'll nail it soon!

Rgds

Ron
AnswerID: 357791

Follow Up By: Horacehighroller - Friday, Apr 03, 2009 at 12:33

Friday, Apr 03, 2009 at 12:33
Is your vehicle 4 x 4.

If so remove the driveshaft and operate on the front axle to see if noise disappears.

Also, re brake pads - can you get someone to walk beside (or ride in the back) to try to determine origin of noise.

Peter
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FollowupID: 625943

Reply By: Member - Duke (TAS) - Friday, Apr 03, 2009 at 23:31

Friday, Apr 03, 2009 at 23:31
Ron173
Does your Vehicle have a limited slip diff. If it does change the oil and see if that helps.
Duke
AnswerID: 357954

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