finding tdc on each piston

[elty001]

I am changing the valve stem oil seals on my 2.7 tdi,looks straight forward enough but how to I get tdc on each piston to stop the valves from dropping in the cylinder.
If I line up the timing marks will that give me tdc on 1 and 4 but what about 2and 3:nenau
need to fill my brain with all the info before I start.
repair manual is a bit vauge to say the least.

 

[AlexD333]

I am changing the valve stem oil seals on my 2.7 tdi,looks straight forward enough but how to I get tdc on each piston to stop the valves from dropping in the cylinder.
If I line up the timing marks will that give me tdc on 1 and 4 but what about 2and 3:nenau
need to fill my brain with all the info before I start.
repair manual is a bit vauge to say the least.

Surely if you can figure out the firing order it should be easy to figure out on rotations no? :nenau

Thinking back to my collage days :lol

 

[Sweety]

Might not be the easiest or right way in doing it but could you not remove the heater plugs insert some welding wire whilst someone turns over the engine by hand & stop when the wire is at it's highest point:nenau

 

[bud]

on the front cover between the crank shaft pulley and the cover for the injector pump timing gear is a mark. on the pulley are two marks as you rotate the crank clockwise(standing in front of the vehicle)

the first mark as it comes up is TDC for number 1 and 4 pistons.

now put a chalk mark on the opposite side of the crank shaft pulley (180 degrees) and turn it till the chalk mark lines up with the mark on the front cover...2 and 3 will now be at TDC

 

[Kishada]

If I remember right, glow plugs and injectors are in a pre-combustion chamber so might be hard to get wire to cylinder. A diesel compression gauge in a glow plug hole would confirm whether the cylinder is compressing or not.

 

[elty001]

on the front cover between the crank shaft pulley and the cover for the injector pump timing gear is a mark. on the pulley are two marks as you rotate the crank clockwise(standing in front of the vehicle)

the first mark as it comes up is TDC for number 1 and 4 pistons.

now put a chalk mark on the opposite side of the crank shaft pulley (180 degrees) and turn it till the chalk mark lines up with the mark on the front cover...2 and 3 will now be at TDC

Cheers mate :thumbsbeen a while since I have done this so just refreshing my brain
Common sense really when you think about it

 

[solarman216]

Lateral thinking is what is needed, use a lever to push a valve down and turn crank pulley slowly till piston pushes valve to its highest point, rock the crank back and forth to confirm, simples, Rick

 

[elty001]

if you where closer to me rick I would bring it round to yours and pay you to do it:lol:lol:lol
not got any garages near me I really trust to do the job that's why im doing it myself.
cant afford for the truck to be out of use for any length of time so I need to be clued up before I start the job

 

[Craig8661]

Where do you get your valve stem seals from also what are they like to do I've swapped engines gearboxes odd head gasket etc

 

[solarman216]

it is a simple enough job, but be prepared for the odd disaster, like losing a collet, lay rag around any holes they could drop down and have a magnetic picup tool handy, Rick

 

[Craig8661]

Lol that would be my luck these trucks are great to work on

 

[Kishada]

Where do you get your valve stem seals from also what are they like to do I've swapped engines gearboxes odd head gasket etc

I think I have a set left over from an Upper Head Set when I did the gasket end of 2012...

 

[elty001]

I think I have a set left over from an Upper Head Set when I did the gasket end of 2012...

Will they fit mine and if so how much do you want.

 

[panelbeater]

Is it not the easiest way to take rockercover off and just turn. It over by hand untill both valves are closed so on compression stroke.

 

[solarman216]

Is it not the easiest way to take rockercover off and just turn. It over by hand untill both valves are closed so on compression stroke.

It is but to be able to get the collets out the piston has to be at the very top and just both valves closed the piston could be 15mm down, Rick