Rover Resources Center
Bosch vs GEMS Engines
Learn the differences between BOSCH and GEMS V8 engines found in Land Rover Discovery I, Discovery II and Range Rover models. Jim shows how to determine whether your Land Rover is equipped with an ACE suspension. The video also shows how to change a pollen filter on a Range Rover and highlights key vehicle components.
Bosch Engine vs. GEMS Engine: An Under-Hood Tour of the Discovery Series II and Range Rover P38Good morning. It's Jim from Atlantic British again. I take care of the technical support here. We have a little motto around here if you've got questions, we've got answers. Today we're going to explain the difference between a GEMS engine in your Range Rover and a Bosch engine. We get people wondering about this all the time. We're going to start with 1998 Range Rover here. This engine is the GEMS engine. The easiest thing to figure out is you'll see this center plenum. It'll say either 4.0 or 4.6 on them. That's the easiest way to tell. Now over next to us here, we've got a Discovery 2. If you look under the hood of this one you can see it's marketable different. It's commonly called what I call the plumber's nightmare. And that's basically the easiest way to tell the difference between the 2 engines, is they really look difference now that you see a picture. While we're here at the Discovery 2 another question we always get is 'Does my car have the ACE suspension in it?' Again, the easiest way to tell, now this car does not have it. Find your power steering reservoir which is right here. It has one cap. If this truck did have ACE, the reservoir would look like this one, with 2 caps on it. It's the simplest way. There's also a picture on our website showing the actually hydraulic rams underneath the front end. While we're here we can give you a quick tour of under the hood. Over here would be your brake master cylinder. This is the fabulous unit where you get the 3 Amigos from. This is the server for the ABS unit. If we pan over to the other side of the truck, this would be your reservoir for the coolant. And right here is the underhood fuse box. Which comes off. Right there. And find all your fuses in there. We've got both cars together. We'll go back over to the 4.0. Another question we normally get is about pollen filters, which you should do I would say maybe every 15,00 miles. They're located in these compartments just at the base of the windshield. They have these covers on them held with 2 screws. You remove the screws. Get that out of the way. And it just pulls out. As you can see Nancy here has nice clean ones. When you're all done just slide it back in, put the cover back on and replace the screws. While we're at this truck, same thing. Here's your coolant tank. Next to that is the fuse box. These trucks have problems with these fuse boxes. As you can see these relays get discolored from overheating. Especially these 2 fronts ones that go with the air conditioner. And a little hint: If these relays get hot, take a look at your pollen filters because usually it overworks the blower motors. This would be your windshield washer solvent. And moving over here this is power steering fluid. Under here is your air filter. And back here is the reservoir for the brake cylinder. Contained in this box here is the air compressor for the air suspension. This car has the air suspension removed so I don't think it's in there anymore. Here at Atlantic British we carry lot's of parts for both of these cars. You can contact us on either RoverParts.com or give us a call at 1-800-533-2210. Contact our sales department. They're very knowledgeable on both of these cars. And another good idea - you can probably follow us on YouTube. Go to our website and you can sign up for the YouTube videos. You'll get notifications when a new one comes out.
Applies To These Models:
Discovery Series II | '99-'04
Range Rover 4.0 (P38) | '95-'02
Range Rover 4.6 (P38) | '95-'02
This video has been viewed: 44388 times
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