I hope this is not a dumb question, but I’m going to ask anyway… Recently my timing chain has gotten loose… engine is making knocking sounds. So I’m ordered a new timing kit… hopefully this fixes my problem… but my question is, is the chain really did stretch a bit and get loose, why didn’t the hydraulic chain tensioner expand and make the chain tighter?
The timing chain does not actually "stretch" much at all. The metal components that makes up the chain is not vert ductile and will not actually deform much. It it the lack of proper lubrication and/or abrasive particles or detritus that wears the space between the components that causes the timing chain to lengthen. The tensioner applies pressure to maintain a degree of pressure to keep the chain in contact with the timing gears but does not reposition the space between the gears. So, the only way to resolve your issue is to replace all of the timing components including the chan, the gears and the guides. More frequent oil and filter changes would have delayed the onset of your particular situation.
Intergeneration 3 I wouldn't be banking on this. How many miles are on this vehicle let's start somewhere that we need to start In most Toyota's that I've owned over the last 47 years The timing components generally outlasted the car very few Toyota engines I've had to replace timing components on very few and I'm talking about things seriously out of spec making noises and ticks and all of that.
Wear ("stretch") lengthening of the chain with mileage gradually throws off the angular relationship between crank and cam sprockets. Up to a point, the tensioner's job is to take up the resulting increase in slack on the slack side of the chain. How loose is your chain?
This is a case of dual threads on the same subject. In his other thread he shows the chain which does appear loose. Op should avoid doing this so continuity is maintained. Probably a good idea to change the timing related parts. The tensioner could be the issue as well as chain wear.
I’m sorry about this. I guess things took a bit of a turn for me, thus the reasoning for a new topic. I do apologize. But once the timing kit comes in and if it fixed my issue I will update!
It's like the old gag about the two hikers and the bear. The merged thread only needs to achieve more coherence than the original hodge-podge of separate ones.
