I recently replaced the timing chain… actually timing chains (it’s a first for me to see more than one in an engine). It runs well, the cams are aligned, but there is a rattling on the passenger side near the front, so it seems the timing chains are doing well.
I’m thinking it’s either a bad rocker or lifter. I don’t remember seeing any broken springs on the valves and despite the rattle it runs well in idle. It does bog down if I push the gas hard, but does well if you ease into it. I already replaced the fuel filter and my ThinkTool shows good fuel pressure.
Any ideas?
@doc and @toyotagrl Macsavers replied you back.
Just replace the chains or did you get the whole timing kit? was the rattling there before the chain replacement? almost seems like a guide or tensioner.
When doing a timing chain, always replace all the components: sprockets, tensioners, guides and chains.
Yes, I did the full Timing Chain Kit from Coyles. I don’t remember there being a rattle before.
Well, after taking off the valve cover and using my endoscope I was able to inspect the valve springs and the rockers to an extent. All seemed in good shape. I pulled the lifter on the intake valve on cylinder one and it was stiff as all get out. I replaced it and put everything back together and the sound was much better. I am going to replace all of them when the weather gets better, but It am happy to report that the rockers look good, so at least there is that.