SPADGE

Hi all
What is the correct procedure for changing the valve stem oil seals on a YB engine please?
Cheers Spadge...

SPADGE

today some time please guys

abdr500

iTrader: (1)

pull of the seals and re fit the new ones with a socket that fits just around the metal rim of the steam seal tap it on. you may need to use a extention bar as a cossy head is a littel deep but make sure the valve guides are clean .the old seal could be hard to remove some time but if you have a steam seal puller it wount be to hard after fitting them make sure no seals have ripped when fitting them

richm

chances are they will be F.tight spadge, without the proper puller it may well be all but impossible to pull them off - you may well have to split the metal down the side of the seal with a sharp screwdriver and gentle hammer, they will fall off then

Jay,

iTrader: (4)

how i do em spadge is i sharpen a screwdrver split the edges of the seal then price them out then knock the new ones in with a 10mm long reach socket mate hope this does the trick

foreigneRS

you need 2 different sized sockets ideally, as the inlet and exhaust valves have different thickness stems.

before all of that of course, you have to remove the valve springs. so you need to hold the valves closed. easiest by removing head, or supposedly possible with head still on using compressed air or rope fed through spark plug hole.

PeterLucas

I just done them, need the head off, cams out, hydraulic lifters out, valves out then you can get at them.

As above they are really tight, i couldnt get them off even with the proper tool which grips there outter edge . . . . so i chiseled (with a normal flat blade screw driver) the metal outter casing, then they just fall off.

The new ones sit nicley inside a 10mm or 11mm socket and can be gently tapped on.

Good luck mate

cossie604

iTrader: (2)

Done mine, as above they are a real tight fit. I also gave up with thte correct tool and ended up useing a pair of snap on long nose pliers that have a ring grip on the end...still took ages and a lot of swearing and cut finger

Stu

cossie604

iTrader: (2)

lol Mr Lucas...I seem to have copied your post

PeterLucas

No probs mr cossie604

They are a bit of a bugger aint they!

I found with the proper tool to get them out i slightly scratched where the hydraulic lifter sits and it was hard to get the lifter back in, so i gave up and chiseled with a screw driver

cossie604

iTrader: (2)

lol I ended up damaging 1 of the valve guides pulling mine off So thought sod it...sent head off for a new set of guides to be fittedd as well Any excuse to improve lol

Stu.

rstoughy

iTrader: (5)

As above with a gentle tap and screw driver.

Re-fitting the collets was the worst bit for me though. Done loads of them over the years and still dread that bit. One of that jobs where you JUST have to be in the mood.

SPADGE

Hmmmm might just replace the head with another i have here
Thanks for the advice people

tracktoy

i use an old pair of long nose pliers- i welded a washer on the end of the tips that was just a bit smaller than the seals then cut it on half (end up with half circles on each), then just welded two long bolts on the handles to make it easier to pull, as is said they are kin tight

you need to be more phil than del