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Toyota 2GR-FE Timing Chain Marks 3.5L

Discussion in 'Tech Help' started by Lewis, Jan 31, 2016.

  1. Lewis

    Lewis Moderator Staff Member

    The following thread will explain how we set up the Toyota 2GR-FE Timing Chain marks after re-installing the heads or performing engine work.

    The first tip is that you can use Toyota's Technical Tip Bulletin 0012-10

    Also we need to know which Bank is #1 and which Bank is #2. Here is a reference...

    [​IMG]

    Make sure that the engine is set to TDC...

    [​IMG]

    There are three timing chains on these 2GR engines. The first two are for the exhaust/intake camshaft timing and will be set up on the cam tower. The last chain is the main cam/crank timing chain and is set up after you have installed and sealed the cam tower assembly to the head.

    Let's start with the Bank 1 (closest to the firewall) cams (tower not assembled) and still off the head. You will need to make sure that this chain is lined up on their marks like so...

    [​IMG]

    and now for a close up view of each one...

    [​IMG]

    [​IMG]

    Once you have the chain installed like this, you can now slide this assembly onto the cams while making sure that the cam pegs seat correctly into the cam indentation.


    Now let's look at Bank 2 (closest to the radiator) cams (tower not assembled) and still off the head. You will need to make sure that this chain is lined up on their marks like so...

    [​IMG]

    and now for a close up view of each one...

    [​IMG]

    [​IMG]

    Once you have the chain installed like this, you can now slide this assembly onto the cams while making sure that the cam pegs seat correctly into the cam indentation.

    Now that you have both Bank 1 and Bank 2 Cam/Chain assemblies put together and the cam towers sealed/installed onto the head, it's time to install the last timing chain.

    If you look closely at the exhaust cam gears, you will see a flat spot on the side. This makes it easier to install the main timing chain with a little extra room.

    For this step we will use the previous marks (noted above) and some new marks on this last chain which will match up to the intake cam gears.

    Again, let's start with the Bank 1 (closest to the firewall)...

    [​IMG]

    Now lets get a closer view and point out the marks....

    [​IMG]

    [​IMG]


    Now, let's see Bank 2 (closest to the radiator)...

    [​IMG]

    Now lets get a closer view and point out the marks....

    [​IMG]

    [​IMG]

    and last but not least, the crankshaft timing marks...

    [​IMG]

    Well that about wraps this one up. This post was just designed to show you how we did this job lining up the three timing chain marks. Please consult a Toyota Dealer and/or the Toyota repair website www.techinfo.toyota.com for more information.
     
  2. nonsub

    nonsub New Member

    Thanks for this thread!

    Rumor has it that it IS possible to perform this work without dropping the engine if one is highly skilled and good with the small spaces/tight angles. Can you confirm that?
     
    Lewis likes this.
  3. Lewis

    Lewis Moderator Staff Member

    Yes, I have seen it done like this but most techs just drop the engine/trans assembly.
     
  4. nonsub

    nonsub New Member

    Hi Lewis. Thanks. It seems to me that the labor would be about 6-8 hours this way and close to triple that by dropping the engine? The TSB itself calls for something like 16hrs. It must be really hard to do it this way otherwise why spend the time dropping the engine?
     

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