How to Install Polaris RZR 900XP Engine 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 a Polaris UTV, it's time to get new valve stem seals and valve springs.
Watch the video above and follow the steps below to install the valves for a Polaris RZR 900.
See the parts diagram:Polaris RZR 900XP exploded parts diagrams
Tools and Parts - Polaris RZR 900 Valve Installation
- Magnet
- Pick tool
- Valve springs
- Assembly lube
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.
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.
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.
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.
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.
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.
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.
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.
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.
