P38 heater O rings

[willem]

G'day guys,

I will be doing the heater O rings on my P38 in the next few days. I will be following the instructions on RangeRovers.net - thanks Ron and others who contributed to that - but what I need to know now is about the O rings themselves. Should I just use OE ones, or are there better ones available aftermarket, or are industrial ones good? If so, does anyone know what size to get?

Also, the Core Temperature Sensor should be replaced. Is OE the only option, or are there other sources that are cheaper/ better?

Any help is greatly appreciated.

Willem

[p38arover]

I'd use OEM for the O-rings. You'll know they are the right size.

[willem]

I'd use OEM for the O-rings. You'll know they are the right size.

Thanks, Ron! :)

Willem

[ytt105]

Did my o rings last week.

I bought 22mm ID x 2.5mm thick from AutoPro for 50c each.
They worked a charm.

I had two problems.
1. My horizontal duct, the one behind the dash, was screwed to the firewall on the right hand side. I had to drill/break the plastic where it joined the firewall to get it out.
2. When I cut the virtical duct I cut it a little bit too low. This made it difficult to use the hacksaw blade as I didn't have enough room for my hand.

Other than that it was just one of those jobs where you needed the strenght of a lion in hands the size of a gnat.

[willem]

I'm having a problem or two. I have it all apart - and someone has been there before me - and I have the clamp screw undone and the pipes off. but I just cannot see how I can get at the pipes to get the new O rings on. There seems to be just not enough space! Or am I missing something?

Willem

[willem]

Well - I've got the heater hoses off so the pipes are loose. Just a quick tip for others - take the heater hoses off before you undo the clamp screw! That gives a little bit better access, but I still can't get the pipes out to have a good look at them. at best I'll be able to reach in and get the old O rings out and slide the new ones on. I'd rather get the pipes out for a good look, but there seems to be no way they are going to come out.:(

Those who said its easy - you're better than me! ;)

Willem

[p38arover]

Did my o rings last week.

I bought 22mm ID x 2.5mm thick from AutoPro for 50c each.
They worked a charm.

I had two problems.
1. My horizontal duct, the one behind the dash, was screwed to the firewall on the right hand side. I had to drill/break the plastic where it joined the firewall to get it out.
2. When I cut the virtical duct I cut it a little bit too low. This made it difficult to use the hacksaw blade as I didn't have enough room for my hand.

Other than that it was just one of those jobs where you needed the strenght of a lion in hands the size of a gnat.

You shouldn't need to cut any ducts.

The horizontal duct doesn't need to be touched, just slide the joiner out then rotate the vertical duct out of the . Don't cut it either.

[willem]

You shouldn't need to cut any ducts.

The horizontal duct doesn't need to be touched, just slide the joiner out then rotate the vertical duct out of the . Don't cut it either.

G'day Ron,

According to the instructions given on the RangeRovers.net forum, by Paul.Adshead, you should cut the side duct and duct tape it up afterwards. He reckons you get much better access. Otherwise I cannot work out how to get the pipes out to work on them.

Willem

[PLR]

I'm having a problem or two. I have it all apart - and someone has been there before me - and I have the clamp screw undone and the pipes off. but I just cannot see how I can get at the pipes to get the new O rings on. There seems to be just not enough space! Or am I missing something?

Willem


G`day Willem ,

because of the underline/bold above , it may be that the plastic part , where the pipes fit has a crack . ( heater core )

If someone has already replaced the Orings and the leak is still apparent , it would be my worry .

The cracks occur in a circular fashion and unless pointed out are hard to see unless you know what your looking for and it won`t matter how many new Orings are fitted if this is the problem .

p38arover will be able to supply you with a picture if he feels he should ?

Cheers
Peter

[willem]

G`day Willem ,

because of the underline/bold above , it may be that the plastic part , where the pipes fit has a crack . ( heater core )

If someone has already replaced the Orings and the leak is still apparent , it would be my worry .

The cracks occur in a circular fashion and unless pointed out are hard to see unless you know what your looking for and it won`t matter how many new Orings are fitted if this is the problem .

p38arover will be able to supply you with a picture if he feels he should ?

Cheers
Peter

G'day Peter,

Thanks for the heads up. I am aware of it and I have discussed it with Ron. Having felt the O rings, their surface was pretty rough and I think that there is a fair chance that what the problem is - at least that's what I am hoping! The crack in the plastic seem to be caused by over tightening the screw, usually because it has been replaced by an Allen screw. This still had the standard cross head screw. I actually think he didn't quite make it to replacing the O rings, but gave up halfway. At least I'm hoping ...

But we'll see as we go.

Thanks

Willem

[andrew e]

I started pulling the dash out of a 2002 p38 today, and it had previously had the o rings changed by a landrover dealer. They had obviously changed the o rings with this same method, due to holesaw holes. Looks like some important people have read your tutorial Ron.

Andy

[willem]

Well. I had a win. All connected and have run the engine for 5 minutes or so. NO LEAKS! I am a happy camper. :D:D:D Now to put all the plastic ware back in!

Willem

[willem]

The job's all finished. All the plastic ware is back in, and I don't have any screws left over! ;) Drove it to take my son to Air Cadets tonight and its all good.

Willem

[p38arover]

The job's all finished. All the plastic ware is back in, and I don't have any screws left over! ;) Drove it to take my son to Air Cadets tonight and its all good.

Willem

I reckon people put extra screws in my tins when I'm not looking! :mad:

[andrew e]

I reckon people put extra screws in my tins when I'm not looking! :mad:

I did that to an old fellow at work. He was rebuilding a multistage pump, and i put a few extra spacers on his bench. It took him 3 hours to work it out, but he never lost his cool.

[willem]

I did that to an old fellow at work. He was rebuilding a multistage pump, and i put a few extra spacers on his bench. It took him 3 hours to work it out, but he never lost his cool.

Nice type, you are! :o:eek::D

Willem

[PaulP38a]

Andy - I expect he was grateful and paid you a compliment like "you are soul" :p

Nice work on the o-rings Willem. Will you teach me one day?

[andrew e]

Andy - I expect he was grateful and paid you a compliment like "you are soul" :p

Nice work on the o-rings Willem. Will you teach me one day?


he retired a month later......