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Scott Clayton
December 09, 2024
Last weekend I got the oil pan and the right crankcase cover bolted and sealed up. I really wanted to pour in some oil and coolant, but because of the cooler garage temperatures I waited for the sealant to fully cure. This weekend I got the headers and exhaust installed. Then I poured in oil and coolant. I fired it up and let it idle until the coolant got to 200 degree Fahrenheit. Then turned it off and drained the oil.
No, that’s not coolant, it’s Motul’s 300V engine oil that is colored green. Why did I waste premium (expensive) oil to flush out any remaining coolant? I have two 4 liter jugs left over from last season. And through oil analysis, I have learned that 300V does not work that well for my application. Those learnings should be a topic for a newsletter in the future!
I didn’t see any residual milky or frothy coolant in the oil. So, I changed the oil anyway, but I didn’t replace the newly installed oil filter. I thought it was going to come out a tiny bit frothy from any residual coolant. However, it’s been sitting since July so most must have found its way to the bottom of the oil pan.
I had lunch while the rest of the oil drained and the coolant cooled down. The weep hole hose is dry. The used right crankcase cover with the installed water pump mechanism from eBay has good seals in it.
A dry weep hole hose.
As you can imagine, I am so excited to ride the RC51 on track next year.
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