I know there are a handful of topics on here about oil pressure, clogged oil coolers, stuck relief values, etc... here is the issue I'm fighting and a few questions that I'm not seeing in other posts:

• Pressure gage hooked up. 11-13psi at idle, 15-18psi when throttling
• Bypassed oil cooler with clear plastic line. No real difference in pressure, but because it's clear oil appears to be pulsing through the line.  Is that normal or would you expect it to be constant?
• Looking to maybe replacing the oil relief value, but where is the thing? (2021 zforce trail 800)  Based on part diagram it appears to be behind the clutch assembly, can I get to this if I pull the primary? Or do I need to pull the clutch housing and everything along with it?
• I've also read in other posts that people have replaced the oil pump. Is this accessible without pulling the engine and cracking it open?

Basically, I'm trying to figure out what are the manageable things to do before pulling the engine and breaking it down.

[2015 Z Force 800 53/Trail EPS]

I know there are a handful of topics on here about oil pressure, clogged oil coolers, stuck relief values, etc... here is the issue I'm fighting and a few questions that I'm not seeing in other posts:

   
• Pressure gage hooked up. 11-13psi at idle, 15-18psi when throttling
• Bypassed oil cooler with clear plastic line. No real difference in pressure, but because it's clear oil appears to be pulsing through the line.  Is that normal or would you expect it to be constant?
• Looking to maybe replacing the oil relief value, but where is the thing? (2021 zforce trail 800)  Based on part diagram it appears to be behind the clutch assembly, can I get to this if I pull the primary? Or do I need to pull the clutch housing and everything along with it?
• I've also read in other posts that people have replaced the oil pump. Is this accessible without pulling the engine and cracking it open?

Basically, I'm trying to figure out what are the manageable things to do before pulling the engine and breaking it down.

Let me say first that the symptom it has of low at idle and low increase when rpms are increased is one of a leaking or stuck relief valve..which in a CFM is just a steel ball and spring. On the older 800s, and I thought this was from 2014 - 2017 but now looks like all prior to 1/13/22, you do have to pull covers to get to it where the newer ones had a cap over it on the stator side, low on the case below the oil filter cover. As the oil pumps are rotary I would expect some pulsing..and that might be more noticeable with a soft plastic line...which I would thing would not be able to take much over 15/18psi. I hope the relief is your problem. Pulsing is also a symptom of a blocked intake track..like a covered intake screen. I can offer this from the service manual: