Pressure relief
Ellen and I moved the boat about two miles to a protected anchorage after a noisy night at our home mooring. (Home mooring for less than a week – then we’ve got no terrestrial home!) I decided this was as good a time as any to address some maintenance. When it’s a little bouncy, the sound of the water against the hull in the forward cabin can be a bit much. It was tough to sleep in this morning. (Ok, it was tough for me, Ellen has no such issues.)
The engine has excellent oil pressure, but when I switch from low idle (around 600 rpm) to high idle (around 1100 rpm) the oil pressure gauge pegs at high. If I throttle up in gear the gauge will also peg at high for a minute or two and then will find its way back to 55 psi where it belongs.
See the white bolt head just above the red thing? That’s where it all started.
I thought I diagnosed it as a faulty sensor but got a faulty new sensor that didn’t read anything. So I got the part (I thought) to replace the pressure relief valve. Today I opened it up to check it out. The relief valve looked fine…it moved smoothly in its bore, it had no galling or significant wear. When I went to put it all back together I realized that because of the tight quarters in that part of the engine I was unable to compress the spring and thread the cap back on. Oh boy.
The challenge was to compress the spring and thread the cap on at the same time. No room for a socket wrench. And the engine was still warm enough that I got a burn/blister on my pointer finger. Poor me!
Ellen offered a third hand but there was definitely no room for that. Then she suggested I remove “that thing” so I did. Pulled the alternator out of my way and got the relief valve back together. No leaks. That’s the good news. No change in the gauge readings. That’s the bad. Hmm.
Got it done!
Ok, I guess the other good news is that I am getting to know the engine. So far we seem to be getting along pretty well.
Friday was not much help but she is keeping an eye on things out back.
