3SGTE on car stem real replacement- Possible?

[RobST162]

Hi all

I've done some searching around and this doesn't seem to have been covered yet (not easily findable anyway - feel free to correct me).

Still trying to get the the bottom of my oil-on-vacuum issues and speaking to a head-shop they advice is that it's very difficult to replace the seals when the head's on the car because of the design/whatnot.

Can anyone tell me if this is a realistic thing to pursue? Is it possible?

And is it possible to diagnose while it's on the car and not-running?

I mean, technically it has to be possible, but any advice and thoughts welcomed.

[Kedderz]

heres a guide for the 4age
http://www.toymods.net/forums/showthread.php?t=26362

assuming the technology in the heads is similar, it might be possible?

[TERRA Operative]

If it's anything like the 4AGE, it's possible. you'll have to pretty much dismantle the head while it's on the car obviously.
Also, it's a good idea to use the 'rope trick' to prevent the valves falling into the cylinders.

[RobST162]

yeah was thinking of borrowing a compressor to keep some air pressure in the cylinder for that

[mic*]

A compressor (with line & attachments) that will hold all four cylinders for the whole job? Its not a bad idea but you'd wana do one at a time. In which case you could turn the crank 90deg progressively and work in your firing order so that the reletive piston is at TDC when you work. You wont lose a valve on a 3S with the piston at TDC

[BlitzRacing]

it should be possible but a pain.. as you have to work around the valve stem..

as above I would use the rope trick with piston at TDC... (*mic is proabably right anyway and no rope is required, but its cheap insurance incase TDC is in the wrong position ahahahh)

[TERRA Operative]

A long thin wooden dowel down the spark plug hole (assuming it's directly above the piston) will tell you when the piston is all the way up.

[thrashlux]

I got a spark plug smashed the middle out welded it to a piece of pipe then put a ball valve and standard airline fitting on the end
made up a lever that mounts to the cam bolts to depress the valve springs put a magnet down to grab the collets used right angled long nose to pull the stem seals off all done in two hours too easy

[RobST162]

I got a spark plug smashed the middle out welded it to a piece of pipe then put a ball valve and standard airline fitting on the end
made up a lever that mounts to the cam bolts to depress the valve springs put a magnet down to grab the collets used right angled long nose to pull the stem seals off all done in two hours too easy

hey thanks mate good practical advice

I wish I could weld! want to send me one of those air devices?

[thrashlux]

Hey I would send you the tool but I am over seas and i have the tool with me. I am in kiribati two hours north of fiji not easy to get to
I have plenty of time now lucky i brought all my tools (ive got the only tig welder in the country) and my project car a 2jz powered 1979 hilux 4x4 with me.
The locals have no idea of what hell i am building and are really intersted in learning about stuff I do my power runs on the 4km long runway that the 737 lands on on tuesdays and wednesdays it my private drag strip (no one to race though)

ps i miss my drive car a st205 back in aus it is waiting for me on blocks of wood
I wonder if it misses getting the piss flogged out of it?

cheers thrashlux

[RobST162]

Hey I would send you the tool but I am over seas and i have the tool with me. I am in kiribati two hours north of fiji not easy to get to
I have plenty of time now lucky i brought all my tools (ive got the only tig welder in the country) and my project car a 2jz powered 1979 hilux 4x4 with me.
The locals have no idea of what hell i am building and are really intersted in learning about stuff I do my power runs on the 4km long runway that the 737 lands on on tuesdays and wednesdays it my private drag strip (no one to race though)

ps i miss my drive car a st205 back in aus it is waiting for me on blocks of wood
I wonder if it misses getting the piss flogged out of it?

cheers thrashlux

man that's one crazy life and setup you going there... how many of us would give our left leg for an accessible run way that's insane!

and only tig in the country wow

[StuC]

rob, the tool is basically the attachment for a compression test (air line that screws into the spark plug thread) Hook it up to the air compressor (with a regulator) Do only one cylinder at a time so you dont drop the valve. only problem is you have to pull the cams out and i know how big a pain they are to do on our cars. Should only take a couple of ours. I do them all the time at work

StuC