RangeRovers.net Forum banner

1 - 15 of 15 Posts

·
Registered
Joined
·
65 Posts
Discussion Starter #1
I need to re-seal the air lines at various points on my P38's EAS. I understand that there are 3 sizes of nylon lines used - 4mm, 6mm and 8mm. I "googled" for the O-ring sizes used and found that rangerovers.net only lists the size of the 6mm lines, presumably the most common. This is a 6X2.5mm i.e. 6mm inner diameter with a 2.5mm ring material thickness.

I wonder if anyone out there would have sizes for the 4mm and 8mm lines. That way I could stock up on the O-rings from a local seals specialist before beginning work.

Thanks a bunch. `8)
 

·
Registered
1995-2002 Range Rover P38A
Joined
·
865 Posts
Dont worry about the 4mm o rings, that port is just a breather line and is not important, the thin pipe ends in the pipe harnes

both the 6 and 8 mm o rings are 2.5 mm
 

·
Registered
Joined
·
65 Posts
Discussion Starter #3
viperover said:
Dont worry about the 4mm o rings, that port is just a breather line and is not important, the thin pipe ends in the pipe harnes

both the 6 and 8 mm o rings are 2.5 mm
Hey, thanks a million. Much appreciated. I can get seals locally so easily and cheaply that it's unbelievable. Furthermore, I have a choice of silicon which stands up so much better to the tropical climate.
 

·
Registered
1995-2002 Range Rover P38A
Joined
·
865 Posts
You can try the silicon, I havnt so let us know if they seal up well.
They should as its a softer compound but I would only use on the ports and air bellows and not inside the Valve block
 

·
Registered
Joined
·
65 Posts
Discussion Starter #5
I was an an engine designer for a large automotive company before.
You cannot use silicon o-rings because they have poor abrasion resistance and are permeable to air and gases in general.
Viton seals are your best bet given the circumstances as they have a high temperature range, and are resistant to most hydrocarbon e.g. petroleum vapors but are unsuitable for acidic environments.
The o-ring sizes for the Rangie are readily available at most o-ring and seals specialists.
 

·
Registered
1995-2002 Range Rover P38A
Joined
·
334 Posts
I was an an engine designer for a large automotive company before.
You cannot use silicon o-rings because they have poor abrasion resistance and are permeable to air and gases in general.
Viton seals are your best bet given the circumstances as they have a high temperature range, and are resistant to most hydrocarbon e.g. petroleum vapors but are unsuitable for acidic environments.
The o-ring sizes for the Rangie are readily available at most o-ring and seals specialists.
I was just about to start a new thread on this one but you're spot on bonnychoo.

I been overhauling my valve block every couple years with the Rover Renovations oring kit with no worries but when Rover Renovations went into wholesale-only business I had to look elsewhere for my supply and came across these silicon ones on ebay. Sure sounded good on paper- better heat tolerance, doesn't perish etc etc etc but they sure didn't work in keeping the Great British Beast up!

My car was dropping to its bumpstops overnight requiring an EAS reset every morning and I drove myself crazy trying to find where the problem was since it (obviously) wasn't from the newly-overhauled-with-silicon-orings-no-less valve block and it wasn't until many weeks (and most of my hair) later that I decided to redo the four airspring valves. Not having any more silicon orings but enough of Rover Renovations' product left to just do the 4 valves, I plonked for those and there was an immediate improvement. Now it was 2 days before the Solihull Horror dropped to its bump stops.

So out came the silicon 6mm orings around the air harness going to the 4 airsprings and in went the Rover Renovations rubber items and voila!! Problem finally solved!


I still have the silicon stuff on the diaphragm, inlet and outlet ports (and valves) and checkvalves but they seem to be working ok there. Maybe if I can get hold of more of the Rover Renovations orings I'll have a go at replacing those as well.


So yeah... the silicon ones don't work. Stick to the normal black rubber type and you'll be ok.

Good post, bonnychoo!!
 

·
Administrator
Joined
·
27,821 Posts
Rover Renovations is a dead horse. Dennis left alot of people high and dry after taking their monies. Hit up Scotty if you want someone that stands behind their work and their goods.
 

·
Registered
1995-2002 Range Rover P38A
Joined
·
59 Posts
Out of interest how many of the 6mm and 8mm o rings are needed for the air lines.
 

·
Registered
1995-2002 Range Rover P38A
Joined
·
59 Posts
I'm getting one of the X8R kits. Do they include all the o rings I'll need to change the ones in the air bags and air tank?
 

·
Registered
1995-2002 Range Rover P38A
Joined
·
343 Posts
The X8R kit is only for what's inside the EAS box, exept for the blue line from the compressor. Per corner is 2 rings extra plus the tankconnection.
The two sticky's about EAS on the mainpage explain a lot but no doubt you have read them already.
 

·
Registered
2006-2009 Range Rover Sport
Joined
·
548 Posts
Be careful with the XR8 kits. The diaphragm failed after 5 months. Also all the orings on the air lines leaked. When I looked at them last night they are bigger than 6mm orings I got in my last kit. No caliper to measure but the internal diameter was visually different.

$_12 (1).jpg

$_12.jpg
 

·
JACK'S GRANDAD
Joined
·
9,244 Posts
Why mess with unknown vendors, when Scotty is on here with a proven track record?

Martin
 

·
Registered
Joined
·
1,107 Posts
In case you have trouble finding them, Scotty includes the airbag o-rings with the valve block o-ring kit on his site. Also check out the Rover Raiser, a really slick setup for emergency inflation and monitoring tank pressure when diagnosing a leak. Great guy and real RR lover.
 
1 - 15 of 15 Posts
Top