How to Install Polaris RZR 900XP Valves 

Installing Polaris RZR 900 engine valves is an easy task if you have the right tools for the job, especially a valve spring compressor. 

After dismantling the engine and lapping the valves of your Polaris UTV, it's time to get new valve stem seals and valve springs for the motor. Watch the video above and follow the steps below to install the valves for a Polaris RZR 900. Use our RZR 900XP exploded parts diagrams for additional reference.

Polaris RZR valve installation

Tools and Parts - Polaris RZR 900 Valve Installation

NOTE: If you haven't lapped the valves for your UTV's engine, watch the video featured at the end of this article before installing the valves. 

Buy Polaris UTV valve spring seat

Buy Motion Pro valve spring compressor

Polaris RZR 900XP Installing Valves

Step 1. Install a valve stem seal. Put a seal in a socket and tap it into place. The valve stem seal doesn't need much pressure. Tap it in gently using your hand.

Polaris RZR 900 XP valve installation

NOTE: In some older model RZR 900 engines, the valve stem seals are made up of two separate parts: the valve seal and the valve seat. Make sure you purchase the correct type of seals for your Polaris RZR model.

Polaris RZR XP 900 valve install

Step 2. Install a valve. Make sure each valve goes back into the valve port it originally came from. Clean the valve and put a coat of assembly lube onto the valve stem before installing it. Hold the valve stem seal in place from the other side as you install the valve to prevent the seal from popping out.

Polaris RZR valve installation

Polaris RZR 900XP valve installation

Step 3. Install a valve spring. Make sure the end of the spring where the coils are more tightly packed is at the bottom. Once the spring is seated, put a valve retainer over it.

Polaris RZR 900XP valve spring installation

Polaris RZR 900 valve spring installation

NOTE: Polaris RZR 900 engines built before 04/09/2012 used one type of valve spring, while engines built after 04/10/2012 used another type of valve spring. Make sure you purchase the correct type of springs for your Polaris RZR model.

Valve installation Polaris RZR UTV

Step 4. Install a pair of valve keepers. Use a valve spring compressor to hold down the valve spring just enough to fit the valve keepers over the valve stem. Don't over-compress the spring, and use a pick tool to position the valve keepers into place.

Polaris RZR side-by-side engine valve install

PRO TIP: Put a smear of grease on the inside of the valve keepers to help them adhere to the valve stem as you move them into position. 

Polaris RZR 900XP UTV engine valves

Step 5. Repeat Step 1 thru Step 4 for the seven remaining valves and you're done.

Need help lapping the valves for a Polaris RZR 900 before installing them? Watch the video above to see how to lap the valves of a Polaris RZR 900XP engine


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