Timing chain

[Cptnslo]

Has anyone done a timing change or any of the Toyota techs here looked at the process? I’ve been down the backside of the motor and there’s some space but not enough that I wouldn’t expect the motor to be pulled.
mom having some warranty work done and they’re replacing the cam gear along with the central vanos bolt.
Im under the impression the timing chain will have to be removed in order to swap the cam gear but I could be wrong.
Just curious if anyone has messed with it or done a timing change and if the engine had to come out

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[Cptnslo]

Bump

 

[RenRed2]

Depends on the repair. Full timing chain removal and the engine is coming out is the conventional wisdom. Certainly the dealer could provide what procedure they are going to use. There is not alot of room near the back.

 

[Twisted Tuning]

You do not have to remove the entire timing chain and etc to change the central valve and solenoid. You doo need special tools to do so and need to lock the cams and crank to do this. otherwise timing will be off or you can damage the cam or central valve.

EDIT: the engine does NOT need to be pulled. all but one thing is does from the top of the engine.

 

[Cptnslo]

You do not have to remove the entire timing chain and etc to change the central valve and solenoid. You doo need special tools to do so and need to lock the cams and crank to do this. otherwise timing will be off or you can damage the cam or central valve.

EDIT: the engine does NOT need to be pulled. all but one thing is does from the top of the engine.

This is good to know, I knew that for the central bolt the timing could be left in the locked state but for the cam gear I would expect the chain to need to be removed. I didn’t see how it would be possible to release tension on it, remove the cam gear, install the new one, and then reinstall it all while not fully removing the chain. I’ve seen the papadakis tear down and it didn’t seem possible.

 

[Cptnslo]

You do not have to remove the entire timing chain and etc to change the central valve and solenoid. You doo need special tools to do so and need to lock the cams and crank to do this. otherwise timing will be off or you can damage the cam or central valve.

EDIT: the engine does NOT need to be pulled. all but one thing is does from the top of the engine.

Looking at this tear down from papadakis there is NO room to remove the cam gear without pulling the timing cover, replacing the rear main seal of course and then having to remove the guides and the chain before removing the exhaust cam shaft.
isn’t this timing component on the transmission side of the car too which would mean separating the engine and trans in order to remove that timing cover?

 

[Twisted Tuning]

Looking at this tear down from papadakis there is NO room to remove the cam gear without pulling the timing cover, replacing the rear main seal of course and then having to remove the guides and the chain before removing the exhaust cam shaft.
isn’t this timing component on the transmission side of the car too which would mean separating the engine and trans in order to remove that timing cover?

if you are doing the Vanos Central bolt you do not need to remove the chain from the engine. Nor do you have to separate the engine from the transmission to do so.

remove the valve cover and undo the chain tensioner and hang the chain out of the way.

Honestly, by the questions, you may need to let someone else do this job. because if you mess up the timing, or damage one of the cams. you will be spending more money on fixing other stuff.

 

[Cptnslo]

if you are doing the Vanos Central bolt you do not need to remove the chain from the engine. Nor do you have to separate the engine from the transmission to do so.

remove the valve cover and undo the chain tensioner and hang the chain out of the way.

Honestly, by the questions, you may need to let someone else do this job. because if you mess up the timing, or damage one of the cams. you will be spending more money on fixing other stuff.

This isn’t me doing it, the warranty work is being performed by the dealership I’m fully capable of doing this myself with the cams locked. The part I’m trying to understand is how the dealership is saying they’re changing the cam gear as well as the central bolt since it does not seem possible to change the cam gear itself without separating the engine and trans. I’m confused as to how that isn’t clear.[/QUOTE]

 

[Twisted Tuning]

This isn’t me doing it, the warranty work is being performed by the dealership I’m fully capable of doing this myself with the cams locked. The part I’m trying to understand is how the dealership is saying they’re changing the cam gear as well as the central bolt since it does not seem possible to change the cam gear itself without separating the engine and trans. I’m confused as to how that isn’t clear.

[/QUOTE]

My mistake, I read 100+ things a day with people messageing me and etc. So I forgot it was warranty work, just scrolled up to the 1st post again. I only read your last post which made it seem like you were doing it yourself.

Cam gear can be replaced without pulling the engine. Cam gear is bolted to the Cam via the central bolt.

 

[Cptnslo]

My mistake, I read 100+ things a day with people messageing me and etc. So I forgot it was warranty work, just scrolled up to the 1st post again. I only read your last post which made it seem like you were doing it yourself.

Cam gear can be replaced without pulling the engine. Cam gear is bolted to the Cam via the central bolt.
[/QUOTE]
No worries you’re good, the fact it’s bolted is normal, however that photo I put of the papadakis racing tear down looks like there is no space in which to remove the cam gear off the camshaft without removing the cover. That was the part I was confused about because that would involve separating.

 

[zrk]

No worries you’re good, the fact it’s bolted is normal, however that photo I put of the papadakis racing tear down looks like there is no space in which to remove the cam gear off the camshaft without removing the cover. That was the part I was confused about because that would involve separating.

Fix your quotes brossss

 

[Twisted Tuning]

My mistake, I read 100+ things a day with people messageing me and etc. So I forgot it was warranty work, just scrolled up to the 1st post again. I only read your last post which made it seem like you were doing it yourself.

Cam gear can be replaced without pulling the engine. Cam gear is bolted to the Cam via the central bolt.

No worries you’re good, the fact it’s bolted is normal, however that photo I put of the papadakis racing tear down looks like there is no space in which to remove the cam gear off the camshaft without removing the cover. That was the part I was confused about because that would involve separating.
[/QUOTE]

Yes there is room without separation of the trans and engine. Bmw designed these very well to be fairly easy to work on.

 

[Cptnslo]

No worries you’re good, the fact it’s bolted is normal, however that photo I put of the papadakis racing tear down looks like there is no space in which to remove the cam gear off the camshaft without removing the cover. That was the part I was confused about because that would involve separating.

Yes there is room without separation of the trans and engine. Bmw designed these very well to be fairly easy to work on.
[/QUOTE]


thats a relief, id rather not worry about them needing to pull me entire engine and transmission apart

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