Hi
I've got a knocking noise, i can hear it up to about 2500 revs it almost sounds like it's coming from the inlet manifold . I've checked the valve clearence's they seem fine, i put a seconed hand head on and it been doing it since then. I'll be rebuilding it again soon anyway does anyone know what it could be to save me a bit of time.
Cheers Keith
Knocking noise
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Re: Knocking noise
tappets? because they are not hydraulic on the 4A.
they normally rattle a little, wouldn't call it knocking though as such, is tooo tinny for that.
they normally rattle a little, wouldn't call it knocking though as such, is tooo tinny for that.
2020 GR Yaris - Circuit Pack
Re: Knocking noise
It's definatley not the tappets, or injectors. Its more of a knock, its stumped me i just hope it will become more apparent when i strip it down.