P38A Throbbing!

josh00mac · Sep 16, 2015

Hi all

Have a 99 P38 Thor 4.0.... as I'm driving I have started to notice what I would describe as a throbbing/humming noise - sounds like it is coming from the front right drive area. could this be drive shafts? hubs? What do people think?

Josh

ukadamwest · Sep 16, 2015

wheel bearing usually makes the humming sound

wil2813 · Sep 17, 2015

ukadamwest said:
wheel bearing usually makes the humming hound

+1 or a bad tyre

Grrrrrr · Sep 17, 2015

+1 on the above.

At what speed and is it speed or revs dependent?

tomcat59alan · Sep 17, 2015

I had a throbbing this morning and it wasn't a wheel bearing or tyre.

Grrrrrr · Sep 17, 2015

tomcat59alan said:
I had a throbbing this morning and it wasn't a wheel bearing or tyre.

Was the missus sleeping on your arm?

tomcat59alan · Sep 17, 2015

Grrrrrr said:
Was the missus sleeping on your arm?

Something like that, but I have put her in a taxi and sent her back to you, she doesn't half snore.

wammers · Sep 17, 2015

tomcat59alan said:
I had a throbbing this morning and it wasn't a wheel bearing or tyre.

Toilet seat drop on it again Alan?

Grrrrrr · Sep 17, 2015

tomcat59alan said:
Something like that, but I have put her in a taxi and sent her back to you, she doesn't half snore.

Thanks for the head's up. I've changed the locks and drawn the curtains.

tomcat59alan · Sep 17, 2015

Grrrrrr said:
Thanks for the head's up. I've changed the locks and drawn the curtains.

I anticipated that so I have done the same in case she comes back.

wammers said:
Toilet seat drop on it again Alan?

It's the risk I take as I need two hands to hold the beast.

ukadamwest · Sep 18, 2015

tomcat59alan said:
t's the risk I take as I need two hands to hold the beast.

one hand with the tweezers, the other with the magnifying glass ?

Fergie46 · Sep 18, 2015

One picture is worth a thousand words.........

Anyway OP, tyre or wheel bearing - try driving down a straight empty road at about 45 mph and gently weave from side to side.

If noise comes and goes its a wheel bearing.......

Grrrrrr · Sep 18, 2015

Nice Avatar there, Fergie46. That is begging for a bonnet comment ...

Fergie46 · Sep 18, 2015

Well, thats Elmo, he's a British Shorthair, 3 years old and utterly gormless.

josh00mac · Sep 24, 2015

Wheel bearing. check. How much is this job to get done typically? assume you need a bearing press. - should I do all four while I'm at it or is it just a case of replacing them as they go??

oakey · Sep 24, 2015

Personally I would do them as they wear out.
You get a warning that they are going and don't normally fail catastrohically

ukadamwest · Sep 24, 2015

josh00mac said:
Wheel bearing. check. How much is this job to get done typically? assume you need a bearing press. - should I do all four while I'm at it or is it just a case of replacing them as they go??

Its not a big job... If i recall the bearing is set in the carrier, unless you have big press handy you change the hub carrier.

Front:

Rear:

jamesmartin · Sep 24, 2015

josh00mac said:
Hi all

Have a 99 P38 Thor 4.0.... as I'm driving I have started to notice what I would describe as a throbbing/humming noise - sounds like it is coming from the front right drive area. could this be drive shafts? hubs? What do people think?

Josh

a wheel bearing will be more noticeable when cornering

SpanishTony · Sep 25, 2015

Wheel bearings not badly priced, brand new hub is very expensive

wammers · Sep 25, 2015

SpanishTony said:
Wheel bearings not badly priced, brand new hub is very expensive

So is a twenty ton press.

P38A Throbbing!

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