Cylinder Head Discussion

[wbain]

Any tips on replacing the exhaust valve stem seals?

[mbzse]

quote:Originally posted by wbain

Any tips on replacing the exhaust valve stem seals?

You can find a most useful step-by-step illustrated guide for this task here (text in German): http://www.pagodentreff.de/artikel/ventilschaftabdichtungen230sl.html

[wwheeler]

A lot of performance maladies that I have seen on this car relate to it not being driven regularly in the past. My guess is that a ball stud leak wouldn't be effected by inactivity but a rubber valve stem seal would. I assuming that you will have to remove most of valvetrain in order to access the seals. I will use the search and see if I can find any related threads.

Thank you for your thoughts!

[jwalk]

Hi Wallace,
 It appears we have a common proble. I am still looling for the fix, but I can offer this advise. After you have removed the linkage and valve cover, and with about 160 psi air pressure applied to a spark plug whole with that cylinder at top dead center you can remove the rocker arm and springs, with the head in place on the block. You will then be able to inspect the valve seals and guides.
 Have fun, this part is not difficult but you will need a tool to compress the springs.
jwalk

[/quote]

[Ziggy]

If oil is leaking past the ball stud threads, would there be signs of this in the exhaust ports?

[glenn]

Naj's reply #13 talks about 'water jets'.  Are these the holes for water passage between the block and head?

[Naj ✝︎]

Naj's reply #13 talks about 'water jets'.  Are these the holes for water passage between the block and head?

The jets actually press fit into the head. The outlet of the jet should face towards the guide.

naj

[ja17]

Hello Q45,

No problem between the cylinder head on an automatic or standard. However the early and late M130 cylinder heads are different and not interchangable. Check the casting numbers on the side of the head and review the " cylinder head chart".