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mike m

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Posts posted by mike m

  1. 4 hours ago, 08ISF said:

    Just a thought, these engines are VVTi (variable cam timing). As I understand it there is some sort of actuator on each camshaft which varies the cam timing according to driving conditions. Has the possibility of this being worn out or broken been discounted? It might explain the " bag of bolts" noise. Bearing in mind how robust these engines are, to my mind, the actuator or a sensor fault is more likely than stretched timing chains/loose tensioners. If it is the actuator it won't be cheap because no doubt it is lovingly hand made from a very rare alloy, but it can't be £6K.

    As far as the quote is concerned IMO Lexus are taking the p***. I would take it to another Lexus dealer or an indy. Anybody in the North London/Herts area able to recommend one?

    Let us all know how this pans out.

    Theres probably a vvti controller attached to the cam sprocket on each head. I know from previous experience of a failed vvti controller on another Toyota that it causes a separate fault code p1349 and causes the engine to judder at the vvti switching point as if it's going on/off the power repeatedly. Only in light throttle.

    I think things like poor oil, lack of oil changes etc causes them to fail along with the chains but there are filters for the oil control valves that can get clogged giving vvti issues.

    @ruutastic Ive heard of these engines sounding like a bag of bolts before. Certainly seen a few vids about it on the tube and I think the oil scavenge pump gets blamed. 

    I know mine taps away sometimes. Good luck getting it sussed.

  2. 2 hours ago, Rusty Crobar said:

    I crash every time I drive the 'ring on the PlayStation, there's no way I could be trusted to drive it in real life 😃

    I think I'd be mildly terrified driving round with mine. More the thought of getting caught up in somebody else's error. 

    They don't half know how to charge for recovery lol

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