Help!!! Engine noise

[winnie_man]

Hello I have a slight sewing machine noise coming from my the head of a VVTi 1G-FE (IS200) @ low rpm especially noticed after long running periods at idle. Cambelt, Tensioner, Hydraulic Tensioner, Waterpump, Cam shaft oil seal, Crank shaft oil seal just changed so its not a timing issue. Any ideas?

It was noticeable b4 the service as well but its not as noticeable now but its still there.

[winnie_man]

Does anybody have any idea what The problem is?

[thechuckster]

are these shim-over or shim-under bucket heads?

oil level correct? right oil? any vvti cam positioning error codes from the ECU?

[winnie_man]

NFI about the shim positions, oil is correct, and I will check the error codes as soon as I know how. LOL

[Lex400]

For some reason I've heard some timing belts making a similar noise. I've read somewhere its something to do with air between the belt and gear teeth making this noise. Remove timing cover and have a listen to see if its coming from there.

You could also try removing your fan belt and start the car for a few seconds and see if the noise is still there or not. While the belt is off (& engine off) grab all the pulleys (alternator, power steering etc) and see if there is any play or noise when you spin them.. possibly a bearing in one of these is starting to go making this noise?? At least this may eliminate/find some things before you go further in.

[greywolf]

Never discount something because it was recently repaired/replaced. Too many times a part has been replaced incorrectly, or the new part was defective at manufacture. Only eliminate a potenial source of trouble through proper diagnosis.

[TRD184]

NFI about the shim positions, oil is correct, and I will check the error codes as soon as I know how. LOL

where abouts in NSW are you located? anywhere near parramatta?? to check Lexus codes you need a Toyota IT tester, it plugs in under the steering column near the hood release lever. we have one at my work.