Rover Resources Center
Coolant Hose & Thermostat Kit Service On Range Rover P38
Watch Doug, our Land Rover Master Technician, as he presents an overview of the replacement of the custom-fit hoses and thermostat for a 1995-1998 Range Rover 4.0 or 4.6 (P38) with GEMS engine. Using
coolant hose and thermostat kit # 9369SKA, which includes all the hoses needed plus a new thermostat, it is recommended that this service be performed every 90,000 miles.
Kit #: 9369SKA Installing the Coolant Hose & Thermostat Kit on Range Rover 4.0 or 4.6 (P38), 1995-1998, 8-Cylinder GEMS Gasoline, North American Specifications
Hi I'm Doug. I'm your tech support representative for Atlantic British and in this video we're going to discuss the coolant and thermostat replacement kit as part of the repair and maintenance academy program for your 1996 to 1999 P38 Full Size Range Rover with the GEMS engine. Now if you are not sure if you have a GEMS engine or not, you can refer back to one of our other videos that actually tells you how to identify either the GEMS or the BOSCH design engine. So in this case we have a complete set of hoses: upper and lower radiator hoses; heater hoses; bypass hoses; refill hoses; that is a service that gets neglected on a lot of vehicles with higher mileage and in many cases can leave you stranded on the road should any of them decide to let go. Land Rover recommends on their schedule maintenance sheet every 90,000 miles. No you see you have somewhat an array of hoses. Even if you replace one, you have to drain the system, this is a good time to do them all. At 90,000 miles you plan on keeping the car for a while, you really don't want to just leave a couple of worn hoses on there that could leave you stranded further down the line. You have the vent hoses, the fill hoses, heater hoses, bypass hoses, the hoses that fill the throttle body heater. Basically every thing that you need including the thermostat. which this is actually a weak point in the system. These go. You want to replace these on a regular basis. These are, in the industry, referred to as the artificial heart as you can see by design. What we're going to do is show you the location of these hoses and how you would replace them, along with the thermostats and how to bleed the system when you're done. So now we're going to be replacing our hoses and thermostat. Now on this particular vehicle, on the P38, your thermostat is external and attached to the radiator support on the passenger side of the vehicle. Some people in the industry refer to it as the Jarvik heart, or the artificial heart, because it's sort of what it looks like. But it is an external thermostat and is mounted to 3 different hoses and your lower radiator hose. Now there's 2 different ways to drain this system, which you're going to need to do. One, you've all ready taken the cap off at the reservoir up top, and that's going to allow the system to drain completely. And there is both a drain plug in the dead center of the radiator on the bottom. And you also have a petcock further up. I usually recommend changing or removing this for the reason it does a complete drain and it is much easier to get at. To remove it you're going to need a 12 allen socket. We're going to take a pail. The system is going to hold about 3 and a half gallons of coolant. So you're going to need at least a 5 gallon pail to put under there. You like to leave yourself a little extra. We have a 12 millimeter allen drive socket and half inch drive which is going to give you some more leverage. And you're ratchet. Now, when you first break this loose you're going to get some outward spray. So be careful. We're going to step back out of the way. As you can see it drains pretty fast. So our system is drained out and you can bet that radiator is completely empty now which is why I like that bottom plug. Now before we take any of these clamps off, the majority of the clamps are a squeeze type clamp which there are several tools you can use to remove them. This bottom type is a worm type, probably has been replaced before. We're going to give that a little shot of penetrating oil and let that sit for a minute before we take that off. Now the thermostat is essentially just held on by the hoses. And then lays on 2 rests that are built into the lower shroud on this. This is usually a good place to start, by removing your clamps, top and bottom, to remove your thermostat. And then from there we'll drop the vehicle and we'll show you the hose location up top. Replacement of the thermostat and that one lower hose is going to cover you as far as lower hose and access from underneath. Now up top, relatively simple, you just have your upper radiator hose which is just a 2 point connection at either end. We'll take that off, which is just loosen the clamp, break it loose, remove the hose, install your new one. Your heater hoses - you have one here that runs from your feed on your heater core. Again just a squeeze clamp, slide it off. You may find these are going to be on somewhat tight. You can always take a razor blade or sharp instrument and actually slice it because you're not going to use it anyway. Slice the hose, break it loose that way. And then the other end attaches to the front of your lower intake manifold. This hose, which is essentially your feed and your heater hose, runs off the lower reservoir, out of the heater core to this T. And then from here down into the thermostat. Now there's some of these vehicles that you may find that when you take your hoses off, it's a good idea to check this metal down tube right here. This sometimes can fill with rust, over a period of time, because they do deteriorate internally and cause a restriction here, which can actually create a back-up of fluid into the reservoir. So if it seems like you're getting excessive pressure in the reservoir tank, or fluid is filling up very high, it may be in that hose. So it's a good idea. You have all the hoses off. The system is drained. It would be a good idea. You have 1 bolt right here. And another up front. You can remove this and check the hoses and see if it is restrictive. Again this is all a matter of remove the clamps, take the old hose off, install the new one. It's probably a good idea, if you're not really familiar with the system, and I do this with vehicles when I'm taking them apart for the first time, with the access of smart cameras, take a picture before you take it apart, and then when you go to put it back together, you're not quite sure how something is laid out, you can always refer back to your pictures. So that's basically it. When you're done you're going to simply fill the system. There is no bleeder on this system at all. Eventually what it's going to do - this is your bleed, this vent line - and this feeds all the way back to the top. And it's a good idea on these 4.0 4.6, fill it up, let it get nice and warm. Shut it down, let it get completely cold, and you're going to find your level is going to drop considerably. At that point you top it off again. A good way to make sure your heater core is not air bound is after the second fill up, bring your vehicle up to temperature, turn your heat on. Make sure you're getting good heat out of the vents. If you're getting good heat you are good to go, the system is bled. So that's all there is to it. When you're ready to change over the hoses and thermostat on your P38 you can give a call to any of our knowledgeable salesmen at 1-800-533-2210.
Applies To These Models:
Range Rover 4.0 (P38) | '95-'02
Range Rover 4.6 (P38) | '95-'02
This video has been viewed: 2799 times
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