Club 80-90 Forums

I have a 1.6td JR engine it smokes on start up.The valve seals are suspect.I am asking advice to an idea may it be possible to do this without taking the head off.The camshaft and hydro tappets taken off.All 8 valves on 4 cylinders would then be closed. Engine piston to TDC no 1 .This is my idea a valve spring compression tool to fit on the cylinder head.If each piston is at TDC the valve would stay on top of the piston when the spring is being compressed.With the collets & cap removed the valve stem seals replaced.The valve spring compression tool specifically made to bolt on the head between where the valve stem centres are.

Don`t think the piston would hold the valves properly closed while you get the collets back on, I don`t think they`re close enough to the valve heads even at TDC.

Mmm the piston is protuded at tdc which means its above the block . The head has no combustion chambers its flat and there are diffrent head gasket thickness which is aprox 1.5mm /2mm 2/3 hole .Valve face when its closed to the piston at tdc must be very close.A dummy run with an engine out to dismantled to try maybe?.

This can be done in place but u use a spesial adapter that connects an air line to ure injector port or spark plug port.The air preshure will push the piston to the bottom of its stroke then hold the valves closed.U then use a special valve spring compressor.
Havent seen this done for years though.

Instead of an airline to hold the piston . The TDC mark on the flywheel clutch lined up for t d c. Pistons 1&4 valves fully closed then lock up the crank bottom pulley/cog with specific tool .Pistons 2&3 180 degrees from TDC on the flywheel for valves to be closed & max piston stroke again lock up the crank.

Seen the compressed air nethod used on Astras and suchlike a good few years ago...

the "Bentley"book says, " remove camshaft,adjusting discs and followers
turn crankshaft until piston of cylinder concerned is at TDC
remove valve springs with vw 541
replace valve stem seal
installing
slide plastic sleeve A onto valve stem
lubricate valve stem seal B
push seal carefully onto valve guide using plastic seal protector,otherwise seal will be damaged and engine will use too much oil
good luck!.

VW 541 where can this tool be obtained?.Maybe from a VW agent.

the vw tool has a bar that bolts along the back of the head the bar acts as a leverage point for the spring compresor which seems [poor picture]to be made up of a tube with a hole cut in its side at one end and ,the other end has a small pin/bar through it with a longer bar attached[near one end] to it.
thats the best decription ican manage ,wish i had a scanner.

Here's a link to one on US eBay. http://cgi.ebay.com/ebaymotors/Volkswag ... dZViewItem I've built and used them years ago. Lever arm w/round spring compressor bolted to it hooks under rod bolted to head. You won't use the plate as it's for head removed use I suggest the compressed air in cylinder. Tap the spring retainer with a hammer while applying pressure to pop the ratainer clips loose as the tapered fit binds up.

Good Luck!

Lloyd

Thanks for all replies and the link .The picts from the link may help me make up a tool.This reminds me when i converted a BQ G clamp with a pipe cut and brazed then used it as a valve spring compresser for a 2ltcu engine.This would be diffrent due to the valve stem/spring reccessed in the head .Mmm might be able to use a hydro bucket reworked to fit over the spring as part of the tool.

Seen the compressed air nethod used on Astras and suchlike a good few years ago...