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How to put timing chain in time?

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    I'm trying to buy a car from someone that needs to have the timing chain in their car put back in time. So right now the care doesn't start. Should that be too much of a problem to fix myself or how much would it cost to get fixed if i sent it to a shop? I don't know if I would have to take then engine out or not. Is it worth buying or should i forget about it?
    I am going to assume since we are on a scion forum, this is a scion.
    These are interference engines. If the chain is no in time,I am fairly certain that there is damage.
    I know that if the chain were to break then it could damage the engine. The guy said that it just had new gaskets put in and water pump and the head was shaved. I don't know if that indicates if anything could be wrong. I don't mind putting some time into fixing it but I don't want a 1k project
    • Edited 1 times, last by Carbon05tC on .
    I would be really concerned about it being apart still. If it had a new head gasket installed then there must have been a problem, you wouldn't know if there was anything else wrong such as a warped block or head since it is partially assembled, you couldn't do a compression or leak down test until you invested the time and money into getting it back together. I would also question the fact that someone started the head gasket job, got as far to dissemble, machine the head and reassemble the head but not install the timing chain. That would be enough for make me think it was someone incapable of doing the job and got in over there head. how could you trust if everything else was done correctly, such as the head being removed properly and installed properly if they couldn't figure out the timing chain? I would only get it if it was really cheap and I would be expecting the possibility of it needing a motor. At the bare minimum if you did the work yourself you would be looking at ~$100 for a chain and component kit, good luck getting any shop to take on the job with it being disassembled already if you did you would probably be looking at ~$500-$800 in labor and that's just an off the hand educated guess.
    Yeah I agree with Carbon on this one. Honestly I'd pass on this on unless he was basically giving the car away. to time the chain its not that difficult, I've done it before but this was with the motor on a stand and using toyota's repair manuals. If it is too far out of time you run the risk of hitting the pistons and valves together and that will cost a whole lot of money to fix. In summation... forget about it unless it is dirt cheap. Worst case you could pick up a used motor for anywhere between $2000 and $7000.
    Someone want to explain to be the basics of timing on a TCs engine? I was told it had a chain and not a belt so it couldn't break and i never needed to worry about replacing it? True?

    I know timing is basically what controls when fuel being let it to fire and when exhaust is being let out.
    • Edited 3 times, last by Carbon05tC on .
    mischman wrote:
    Someone want to explain to be the basics of timing on a TCs engine? I was told it had a chain and not a belt so it couldn't break and i never needed to worry about replacing it? True?

    I know timing is basically what controls when fuel being let it to fire and when exhaust is being let out.


    Yes it is a timing chain in the tC not a belt. Unlike a belt it does not require replacement as maintenance.

    The timing chain(or belt) in a short explanation syncs the cams and crank so that the valves open at the correct time in relation the the position of the pistons.

    While a timing chain is not something that normally needs to be serviced (unlike a belt), I have seen a cases, not just in a 2az but in other chain motors (gm Eco tec 2.2 comes to mind) where the timing chain guides wear out and causes the chain to rattle, and if let go to long can cause the the chain to jump teeth on the sprocket throwing it out of time. On most chain motors(and some belt motors) including the 2az they are what is called an "interference motor" which basically means if the timing is out due to a jumped chain, broken chain, etc the valves and pistons will not move in sync with each other causing them to contact which will cause major engine damage, such as bent valves, cracked pistons, bent rods, etc.
    Carbon05tC wrote:
    mischman wrote:
    Someone want to explain to be the basics of timing on a TCs engine? I was told it had a chain and not a belt so it couldn't break and i never needed to worry about replacing it? True?

    I know timing is basically what controls when fuel being let it to fire and when exhaust is being let out.


    Yes it is a timing chain in the tC not a belt. Unlike a belt it does not require replacement as maintenance.

    The timing chain(or belt) in a short explanation syncs the cams and crank so that the valves open at the correct time in relation the the position of the pistons.

    While a timing chain is not something that normally needs to be serviced (unlike a belt), I have seen a cases, not just in a 2az but in other chain motors (gm Eco tec 2.2 comes to mind) where the timing chain guides wear out and causes the chain to rattle, and if let go to long can cause the the chain to jump teeth on the sprocket throwing it out of time. On most chain motors(and some belt motors) including the 2az they are what is called an "interference motor" which basically means if the timing is out due to a jumped chain, broken chain, etc the valves and pistons will not move in sync with each other causing them to contact which will cause major engine damage, such as bent valves, cracked pistons, bent rods, etc.


    Thanks for the education. Is the TC an interference engine or non-interference engine?

    Non-interference engines is the chain/belt jump, break, whatever it doesn't matter? Nothing will get damaged or anything...? You just have to replace the belt/chain?

    mischman wrote:
    Carbon05tC wrote:
    mischman wrote:
    Someone want to explain to be the basics of timing on a TCs engine? I was told it had a chain and not a belt so it couldn't break and i never needed to worry about replacing it? True?

    I know timing is basically what controls when fuel being let it to fire and when exhaust is being let out.


    Yes it is a timing chain in the tC not a belt. Unlike a belt it does not require replacement as maintenance.

    The timing chain(or belt) in a short explanation syncs the cams and crank so that the valves open at the correct time in relation the the position of the pistons.

    While a timing chain is not something that normally needs to be serviced (unlike a belt), I have seen a cases, not just in a 2az but in other chain motors (gm Eco tec 2.2 comes to mind) where the timing chain guides wear out and causes the chain to rattle, and if let go to long can cause the the chain to jump teeth on the sprocket throwing it out of time. On most chain motors(and some belt motors) including the 2az they are what is called an "interference motor" which basically means if the timing is out due to a jumped chain, broken chain, etc the valves and pistons will not move in sync with each other causing them to contact which will cause major engine damage, such as bent valves, cracked pistons, bent rods, etc.


    Thanks for the education. Is the TC an interference engine or non-interference engine?

    Non-interference engines is the chain/belt jump, break, whatever it doesn't matter? Nothing will get damaged or anything...? You just have to replace the belt/chain?




    The tC is an interference engine (both tC1 and tC2).

    Yes in a non-interference engine if the belt breaks etc.. it shouldn't cause any engine damage, it just won't run
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