My service manager called and offered me an 8 year/125K mile platinum warranty. Of course I accepted, but I will continue to pursue the source of the clatter.
I aready have a vaccuum pump, so I just need the tubing that fits down the dipstick tube. Can I use the plastic tubing sold in home and hardware stores for ice-maker hookups, etc.? I'm afraid it will melt in the hot dipstick tube.
I just got an email from my Service Manager. Their version of Toyota Genuine Motor Oil is PRIMEPLUS. I never heard of it and I'll never find out if its high moly or not.
That's funny. I have the sound when its cold. They said its because the forged pistons must expand to fit tightly in the cylinder at normal operating temp.
I have cold startup noise in 2008 Sienna. Some call it say piston slap, but Toyota will never utter those words.
Is there an oil out there that can help quiet down the noise and reduce wear?
I may have found the source of the high moly readings in my used oil sample. I found online that the Lexus 3.5L 2GR-FSE uses moly-coated piston skirts to reduce friction. Since the Toyota 2GR-FE is a close cousin of that engine, I assume it also uses moly-coated pistons.
If piston slap is the...