Pete
I am not sure about the whooshing sound but the brake modulator thread is here
All p38 owners up to mid 1999 please read.
Perhaps another bleed might solve the problem?
Steve
I've been having a bit of a search around for info on this, I'm sure some of you have had to deal with this before.
When I press the brake pedal, I have roughly an inch of movement before anything happens.
While the pedal is moving through that inch, I hear a whooshing sound.
Pressing the pedal further, the pedal feels good, brakes work perfectly and the P38 pulls up with no trouble at all with no sounds.
I have recently bled the system properly twice and also replaced the brake hoses, with another proper bleed. The accumulator is about 12 months old.
I'm wondering if this is something to do with the modulator.
I've read bits about the brake modulator, there is a fine mesh screen in there that gets clogged, others have put some type of kit through and cleaned the whole modulator out as well.
I have not tackled the modulator before, so if anyone can share their experiences with this I'd be most appreciative...or any other suggestions you may have!
Cheers, Pete.
 ChatterBox
					
					
						ChatterBox
					
					
                                        
					
					
						Pete
I am not sure about the whooshing sound but the brake modulator thread is here
All p38 owners up to mid 1999 please read.
Perhaps another bleed might solve the problem?
Steve
Thanks Steve, I've been doing a bit of research on this and I think you may be right, could just be air in the system still.
I'll fit that other short brake hose and give it another full bleed...fingers crossed!
Other than that, the brakes are working perfectly, pump is running as it should, no fluid leaks, new fluid right through.
Mine is a 2001 P38, which should not have the plastic components described in that thread.
Interesting read though, seems like a major oversight on Land Rovers part, it was probably cheaper to put plastic components in rather than metal.
 YarnMaster
					
					
						Subscriber
					
					
						YarnMaster
					
					
						SubscriberHi Pete,
I suspect that LR simply bought the complete assembly from Wabco...and that warranty claims from LR forced a change to the Wabco production line... full marks to Russell Botha for his persistence in developing a local "fix" for parts which are otherwise "unobtainable" ...and he provides a CD with detailed instructions!!
MY99 RR P38 HSE 4.6 (Thor) gone (to Tasmania)
2020 Subaru Impreza S ('SWMBO's Express' )
2023 Ineos Grenadier Trialmaster (diesel)
I've installed one of Russell's kits. Not a hard job, and well worth the effort! Bleeding the brakes as per RAVE with SWMBO remains the hardest part
Gary
I was wondering if I need to give my modulator a clean out. In particular the fine screen inside the reservoir can get clogged, thought that may be playing funny buggers with my pedal. Of course pulling the modulator apart would probably require new seals etc which are probably in that kit. I'll give the system another bleed and see where it's at.
Thanks for the replies, Pete.
Peter, if you are going to bleed the system again consider removing the reservoir and cleaning the filter on the bottom of it. The reservoir simply pushes into rubber seal on top of the modulator and is not pressurised. It can be prised out fairly easily with a couple of screw drivers.
Gary
Gary, you are a champ! That is exactly the info I needed.
I want to clean that screen, but didn't know how to get to it.
Just to be clear, the reservoir just levers off the top of the modulator?
It is my understanding that screen is inside the reservoir, once it is off, how do I get to the screen?
Never done this before, just want to be prepared.
Thanks, Pete.
 YarnMaster
					
					
						Subscriber
					
					
						YarnMaster
					
					
						Subscriberjust make sure that you wear protective gloves...those blue nitrile gloves from Coles/Woolies are ideal. The glycols etc in brake fluid are on the nasty list and you don't want to be absorbing it through your skin...
MY99 RR P38 HSE 4.6 (Thor) gone (to Tasmania)
2020 Subaru Impreza S ('SWMBO's Express' )
2023 Ineos Grenadier Trialmaster (diesel)
Thanks Hoges, I'm a painter and decorator by trade, so I have a good supply of those extra strong black nitrile gloves, always have a pair on when working on the car.
Aside from the protection from nasties, it's great pulling the gloves off at the end of the job to find clean hands underneath!
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