Mud-club

Vehicle & Technical => Range Rover => Topic started by: BigBlueBeast on August 21, 2011, 17:11:04

Title: P38 Rings
Post by: BigBlueBeast on August 21, 2011, 17:11:04

Hi guys, I am going to be attempting to do the piston rings on my 4.6 V8 rangie. Has anyone on here done it before, and if so, is it easy enough to do (for someone who actually has experience with mechanics and gas turbines!!).

Reason I am doing it is I am burning oil, which is not good and also losing coolant.

Any advice would be fantastic and well appreciated.

Title: Re: P38 Rings
Post by: Range Rover Blues on August 27, 2011, 04:11:58

Being a P38 shouldn't make that much difference.  Sump comes off easily becasue the axle is well out of the way, just a few pipes bolted to the flange.

EFi meeds taking apart carefully.

heads use composite gaskets and stretchy bolts, these should be renewed aparently.

Rings out, glaze bust the bores and fit new big end bearings whilst you are there (with a little work you can do the mains too).  Stick a new cam(&chain) on it at the same time and it's not far off new :wink:

Title: Re: P38 Rings
Post by: BigBlueBeast on August 29, 2011, 15:26:10

Thanks RRB. It had a new cam and chain just before I bought it, the previous owner actually paid a garage!!

Just reading through the Rave for doing the rings, and it goes on about removing the timing chain and gears! Is this necessary? It's not really something I want to be doing, also it specifically says "DO NOT attempt to de-glaze cylinder bores"

Also, what do you mean about taking apart the EFI?? What needs to be taken apart carefully?

All parts have been ordered: Full head gasket set, including head bolts, conrod bearings and bolts, full set of rings - and a water pump!

Have I forgotten anything?

BBB

Title: Re: P38 Rings
Post by: Range Rover Blues on August 29, 2011, 19:46:12

I vaguely remember something about P38s having a cylinder bore treatment, nicosil or something, years since I heard about it though so I can't tell you more.

The EFi will be under pressure and you need to remove it in stages unless you are very lucky and double jointed.

I can't see why the cam needs disturbing though, or the water pump come to that.

You need head gaskets, bolts, rocket gaskets, gasket paste for the plenum, valley gasket, sump gasket set, some new jubilee clips, antifreeze, that kind of stuff.

Soak the piston in WD40 overnight before trying to clean them (get the coke off them) with a soft sink scourer, the green ones.

Can't think of anything else :undecided: