l322 poss intercooler/pipe problem

sestorious · Aug 22, 2012

as titled im lookin for info regarding a possible intercooler / pipe problem I may have. ive trawled the web and these parts keep flagging up. my range seems to be very loud on acceleration as though there is air whoosing ubder the hood. I dont seem to have any power loss fron the turbo, no smoke just a loud wind noise. its the same engine as the x5 I had previously yet the x5 was quiet? its the 3.0 td6 engine ive changed oil breather filter, cleaned egr and serviced it but to no avail. ive read it could be a cracked/loose pipe to intercooler but wanted further advice/recommendations on wat to check how to check or even other possibilities? thanks in advance.

2.0_hippo · Aug 22, 2012

mines very loud too on hard acceleration, never thought anything of it.

all of the td6's i have heard are the same.

the only time i had a loud "wooshing" sound was when my inter-cooler hose was hanging off and as you revved up the engine the high pressure air would leak out and sound like a had a turbo dump valve fitted.

it eventually blew off completely and the car wouldn't go quicker than 30mph !

tightened up the jubilee clip and all was well.

bigdel · Aug 23, 2012

It's not the viscous fan is it? when that kicks in, mine sounds like a bloody hovercraft. quite embarrassing in town as everyone looks round to see what's coming.

sestorious · Aug 23, 2012

thanks for replies. dont think its the fan it sounds normal an ive looked at pipes an they seem to be fitted correctly. it only seems to be noisy and windy under acceleration? had it plugged in no faults showing so im stumped... unless they are just noisy ????

Saint.V8 · Aug 23, 2012

The fan does create quite a racket when it locks up to aid cooling during acceleration - during idle you will not notice the difference, the fan unit only starts locking up when the engine speed increases....

The Viscous Fan unit works as such -

Engine Cold- first start of the day, the Viscous fluid is cold and thick, for the first 30 seconds or so, you will get a louder than normal roar from it until the fluid warms up and thins out....the fan will then turn slower than normal until the engine warms up.

Engine Warm - The fluid is now warm and thin so the fan speed is greatly reduced and you won't hear any such roar....

Engine getting hot - the Viscous fluid starts to thicken as its temperature increases, this causes the fluid to start dragging the fan faster to match the engine speed, creating more air flow - the roar of the fan can be quite load at times....

If your fan roars all the time, the viscous unit is no doubt shot.....

If you are not getting any loss in acceleration or engine performace - I'd put money on the fan unit....

Datatek · Aug 23, 2012

saint.v8 said:
the fan does create quite a racket when it locks up to aid cooling during acceleration - during idle you will not notice the difference, the fan unit only starts locking up when the engine speed increases....

The viscous fan unit works as such -

engine cold- first start of the day, the viscous fluid is cold and thick, for the first 30 seconds or so, you will get a louder than normal roar from it until the fluid warms up and thins out....the fan will then turn slower than normal until the engine warms up.

Engine warm - the fluid is now warm and thin so the fan speed is greatly reduced and you won't hear any such roar....

Engine getting hot - the viscous fluid starts to thicken as its temperature increases, this causes the fluid to start dragging the fan faster to match the engine speed, creating more air flow - the roar of the fan can be quite load at times....

If your fan roars all the time, the viscous unit is no doubt shot.....

If you are not getting any loss in acceleration or engine performace - i'd put money on the fan unit....

+1

sestorious · Aug 23, 2012

thanks again guys! it seems to be like it all the time ? is there a way of testing the viscous fan ? are they expensive/hard to fit? thanks again

Saint.V8 · Aug 23, 2012

With the engine cold (after the 30 seconds or so to warm up - give it a minute or two) use a rolled up newspaper and try and stop the fan with it.....

if the fan slows - the viscous unit is fine - if it eats the paper the viscous unit has seized....

OEM part from Island 4x4 - £125
****part from Island 4x4 £108

Not to much of a job to get off - the only hard part is stopping the water pump from turning while you are trying to undo the Viscous Coupling nut.....but with the correct spanner for the V/C and stop bar for the Water Pump it should be a doodle....

l322 poss intercooler/pipe problem

sestorious

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2.0_hippo

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bigdel

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sestorious

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Saint.V8

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Datatek

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sestorious

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Saint.V8

Dyed-in-the-wool 100% RR Junkie

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