Hello, I have a yanmar 3tnv88 (komatsu 3d88e) in my pc35mr-2. Recently it started blowing blue smoke at higher rpms. You can hear the sound of the engine change as well. Any idea of likely causes? Here's a video of it: https://photos.app.goo.gl/nRRy1uuDAHUHZxGn8 Thanks, john
Best to post your Serial number and year if you know as it may help others to help you. Simon C
To me that looks like oil smoke and I would look at the intake side of the engine for signs of oil. Possibly a breather line or failing intake line. Maybe your engine vent line is plugged. Open the lid where you'd add oil to the engine and look for blow-by by at different engine RPM's There's a couple of things to look at.
Floating the valves.?? Check the max rpm & compare to spec.. it’s probably on the data plate.. make sure it’s not going above max rpm..
I’ll check those things out. Ordered a digital tach meter, lost my old one in the flood.
Is this engine turbocharged? If so, it needs checked out.
To me it doesn't sound turbo'ed
Post a pic or 2 of the engine
it is not turbocharged. Checked blow by and it is minimal. Tachometer should be arriving tomorrow
If your getting a hand held tach.?? Go to the dollar store or Harbor Freight and pick up a pack of SUPER GLUE.. Degrease the crank hub/harmonic balancer, blow it dry and put a dab of SG on your reflective tape and then stick it to the balancer.. give it time to dry.!!! I use the he!! outta mine but the glue on the tape is horrible..