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Simulating Engine Load Whilst Stationary?
scootz - 14/8/12 at 10:51 AM

I have an air leak somewhere in my Land Rover TD4 intake system. The whine is only noticeable between 2-3k rpm and whilst the engine is under load.

Is there any way I can simulate engine load whilst the vehicle is stationary to get a look / listen under the bonnet to see where it's coming from?

Thanks in advance!

Ben_Copeland - 14/8/12 at 10:58 AM

On a rolling road. Can't see a safe way of doing it otherwise. Strap it to something but it'll either bugger the clutch or pull whatever you've strapped it too out of the ground !

Mr Whippy - 14/8/12 at 11:18 AM

stick it in low range and have someone sit in the engine bay to find the noise, a large car park will do fine

omega 24 v6 - 14/8/12 at 11:21 AM

I'd agree only on a rolling road as well. Unless ( and I'm not sure what possible ) you could load an mot brake roller at a local garage. Just an Idea and as I say i'm not entirely sure.
ETA just re read op. and as its a 4x4 then mot brake rollers a no go.


[Edited on 14/8/12 by omega 24 v6]

rodgling - 14/8/12 at 11:38 AM

Stick it on axle stands and use the handbrake?

mad4x4 - 14/8/12 at 11:47 AM

It's a Landrover - Chain it to a TREE and then get it to break traction... then work throttle from under bonnet.

Or Better still have a driver in it he can dip the clutch if problems arise



Suggest Low BOX but difflock out.


(used the same methode to prove to the garage that the 4x4 wasn;t working on my Ford Ranger pickup!)

Far safer than pulling on the handbrake on axle stands... ( not recommeded to apply handbrake while moving on a landrover anyaway as it is Propshaft instead of pads or shoes

[Edited on 14/808/12 by mad4x4]

[Edited on 14/808/12 by mad4x4]

scootz - 14/8/12 at 12:00 PM

Cheers guys.

I really should have added though that it's not a manly Defender... it's an auto Freelander!

adithorp - 14/8/12 at 12:33 PM

I'd use one of these THESE ...if I had one. They're not cheap but (under the usual Scoots rules) if you want to buy one, then I'll take it off your hands after for 1/2 price

mcerd1 - 14/8/12 at 12:36 PM

this might be a bad idea, but what if you just partialy block the air intake - would that not show up the leak??

(with something that can't get totaly sucked in and destroy the engine obviously)

MakeEverything - 14/8/12 at 12:51 PM

quote:
Originally posted by mad4x4
It's a Landrover - Chain it to a TREE and then get it to break traction... then work throttle from under bonnet.



Really???

Mr Whippy - 14/8/12 at 12:54 PM

quote:
Originally posted by scootz
Cheers guys.

I really should have added though that it's not a manly Defender... it's an auto Freelander!


If its an auto you just stand on the brakes and rev the engine in gear! same thing as driving under load as far as the engine is concerned, you should not do it for too long however as the torque converter oil will get hot but should be long enough for you to find the leak source, which sounds like the turbo outlet pipe to the engine manifold

this is also a fun thing to do at lights as the second they change the engine is already trying to drag the car along and you shoot off like a rocket which poor clutch boy is still trying to move off without stalling

[Edited on 14/8/12 by Mr Whippy]

scootz - 14/8/12 at 03:52 PM

quote:
Originally posted by adithorp
... (under the usual Scoots rules) if you want to buy one, then I'll take it off your hands after for 1/2 price


It's not a 'rule' it's THE LAW!

scootz - 14/8/12 at 03:53 PM

quote:
Originally posted by MakeEverything
quote:
Originally posted by mad4x4
It's a Landrover - Chain it to a TREE and then get it to break traction... then work throttle from under bonnet.



Really???


They breed them tough in St Cyrus!

rusty nuts - 14/8/12 at 07:50 PM

Find a garage that has a smoke machine, any leaks should show up in seconds! Thinking about making a locost version if/when I get time

scootz - 14/8/12 at 07:52 PM

Cheers all.

I did the brake / rev test and can hear the whine... still no fecking idea where from though! It just seems to come from the entire engine bay!

I removed the EGR and blocked it off... would this affect the engine sounds???

paulf - 14/8/12 at 09:06 PM

Can you check the boost pressure using the built i diagnostics or a fault code reader?.It may not be leaking boost causing the noise although they are known to split the rubber boost hoses and its not always easy to see the split.
Paul

coyoteboy - 14/8/12 at 09:13 PM

I just block up my exhaust, strip the intake to the turbine outlet and seal in a bike valve in a plate, then shove 15 psi into it, shows up leaks pretty fast but you have to go by feel rather than sound as clearly you get some venting though the block.