Question about 2006 Toyota Corolla
Timing chains do need to be replaced but they can typically go much longer between being serviced than can timing belts. The chain will stretch out over time and can 'jump' timing. If you have an interference engine then that can prove disastrous as the piston can crash into the valves.
Its not terribly common for a timing chain to jump timing but not impossible. I have a vehicle with nearly 120k with a timing chain and its never been replaced and is still in good shape, I have another vehicle with 170k also with a timing chain that has never been replaced.
If it were me and I was going to be doing some work in that area and had easy enough access to the timing chain, and the mileage was getting up there, I would replace it. Timing chains typically also have a tensioner, so if you replace it, dont forget this item.
Posted on Dec 31, 2008
Yes, Timing Chains get bad over Time and need to be Replaced.
Posted on Dec 31, 2008
SOURCE: need marks for timimg belt
On the crankshaft gear there is a VERY small dimple that aligns with a mark on the motor. The mark on the motor (a small triangle) is at roughly 11 o'clock. After you line these timing marks up look at the camshaft gear and you will see that on one of the spokes there is a hole. You need to use a mirror to line this hole up with the dimple on the cover that is behind the camshaft gear. (It is at roughly 1 o'clock) If this hole is 180 degrees from where it should be you need to rotate the motor 1 more revolution at the crankshaft and it should now be lined up, or close. Once lined up I like to take a silver (metallic) Sharpie and make my own mark on the camshaft gear and on the backing plate that is behind it. You can make this mark where ever it is convenient for you. As long as you know where your marks line up, that is all that matters. This way I don't have to use the mirror as often.
Posted on May 26, 2009
Timing chain located in the front. Take the bolt out of the oil pan that the timing cover is bolted to. You have to take off the harmonic balancer to get the cover off and that takes a pully puller to get off The "how to" can be found in a Haynes manual but it might be better off taking to a good local mechanic. The timing chain is 80 bucks and the labor should be about 240. Someone doing it on the side should do it for half that.
Posted on Jan 10, 2010
Testimonial: "you have answerd my question in full and its very helpful i didnt know about bolt in oil pan thank loads"
SOURCE: is my 2001 timimg chain or belt
It is a timing belt and it needs to be replaced every 60,000 miles, this is very important as this is an "Interference" design engine, if the belt fails it severely damages the engine.
Posted on Mar 04, 2011
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