4JB1-T engine in 2000 rodeo
Have slowly developed a whine coming from the turbo, originally though it was a bearing type grinding noise but have ruled that out.
Took the belts off, fan etc.. and still the sound.
I believe its the compressor wheel fins, they feel rough when running my finger across them. Look like the edges are finely serrated.
Theres no play in the wheel/shaft.
I'd liken the sound to a quieter muted air raid siren...one of those old manual wind-up ones.
Engine has 340K on it and this is the original turbo.
My question is: is it risky leaving as is?
Car has boost and power, havnt noticed any drop in power.
Regards
Stan