Valve spring recall

[Gunman]

Originally Posted by Tcoat

Well according to all the "enthusiasts" here they are still working out instructions that the poor, imbecilic, uncaring, Toyota techs can manage to understand.

The pop up picture books take time to print.

[strat61caster]

Originally Posted by ermax

Because from what I am hearing in this thread they plan to do it without removing the heads which is not what the manual wants you to do. The manual also doesn't want you to remove the cam caps before removing the cam subassemblies for risk of warping the heads. Perhaps they are trying to come up with an untorquing procedure that will allow them to remove the caps while the subassembly is still bolted to the head without warping. This would be a big time saver because you wouldn't have to clean up packing and reseal. Just think of how hard it would be to clean packing off a head and shit dropping down in there with no way to flush because you are trying to leave the head bolted to the engine.

Interesting, I'd expect that the head is less prone to warping when bolted to the shortblock than when on the bench, but engines are built with black magic these days.

[ermax]

Originally Posted by strat61caster

Interesting, I'd expect that the head is less prone to warping when bolted to the shortblock than when on the bench, but engines are built with black magic these days.

To be more specific. The head bolts to the block and then the cam is secured into the cam subassembly and then the subassembly is bolted to the heads. The manual says warpage comes if you try to unbolt the cam caps to release the cams from the subassembly without removing the subassembly from the head first.

[ermax]

Originally Posted by RZNT4R

Debris will fall down an oil drainage how into the sump where it's relatively easy to flush.



Also, it's probably very doable without taking the cams off, one would just need an appropriate special tool to compress the lifter. If you can compress the lifter, you can take the shim out and it's very likely that once the shim is out you can take the rocker out from under the cam. Once that's out you've got a clear shot at the valve stem. Some compress air into the plug hole to hold the valve in while taking the spring out is all that's needed.

That is an interesting concept. The rockers on this thing are tiny so it this very well may be possible. The shims don’t add much length to the shim you may not even have to bother with them. The trick would be developing a custom tool for compressing the springs without blocking the ability to pull the rocker out. How ever they go about this job it most likely will not be the way the current service manual says to do it. The manual wasn’t designed with mass rebuilds in mind. They are going to find someway to make this job quicker than the way laid out in the manual. It will be interesting to see what they come up with.

[RZNT4R]

I worked a scion tc that hit a money shift and floated the valves. 5 rockers just popped out from under the cams and it drove to the shop under it's open power.

I managed to reinstall the intake rockers and shims without lifting the cam, installing the rocker on the lifter and compressing it with a small 1/4 drive socket on an extension and slipping the shim under it. The only thing that stopped me doing the same on the exhaust was the rockers angle in the head.

Though I may have spoken too soon, looking at pics of the head more closely it seems a bit trickier. There's some good room to compress the lifter on the exhaust, but not much to work on the springs, then there's plenty of room to work on the springs for the intake, but not too compress the lifter.

[Crydo]

I have the actual recall repair manual, it says if the spring broke it almost always happens within the first 5000km/miles.

I think I wont do the recall on mine.

[DandoX]

Originally Posted by Crydo

I have the actual recall repair manual, it says if the spring broke it almost always happens within the first 5000km/miles.

I think I wont do the recall on mine.

If it wouldn't be too much trouble could you upload an image of that page please?

[Ultramaroon]

+1 Please share the whole doc.

[humfrz]

Yes, I want to see the "jig" they are going to use -


humfrz

[finch1750]

^what they said

[Crydo]

Originally Posted by DandoX

If it wouldn't be too much trouble could you upload an image of that page please?

I will upload an picture of it as soon as possible.

For the other people asking me to upload the whole document.
Im not sure if I am allowed to publish the whole document online, I will look into this.

[Ultramaroon]

Originally Posted by Crydo

Im not sure if I am allowed to publish the whole document online, I will look into this.

Bah! No one has to know. We won't tell.

[RallySport]

It'll be our little secret...

[Crydo]

Its an official document from Subaru, I dont want to do anything that will get me into trouble with them.

I am currently at work and will be done at around 23:00 CET, I will try to upload the page as soon as possible where it says "within the first 5000km/miles."