Overhauling the head on my 1971 CL175, it only had the seals on the exhaust valves, is this correct, I bought a full gasket set but was surprised it didn't contain these seals, anyone know where I could get some from? Many Thanks Martin. Also do you only replace the little o ring that sits inside the cupped holder?
11-08-2019, 11:19 AM
You do not really need valve guide seals, but if you do want to use them, just put them on the intake valves.
11-08-2019, 11:24 AM
Just checked the manual and they are definitely only on the EX valves?
11-08-2019, 11:33 AM
Really confused now, just been on ebay and these seals are being sold for the inlet and exhaust? could someone please put me right! Martin.
11-08-2019, 11:37 AM
That's correct, only the exhaust valves. I also found this suprising, I always thought that inlet valve guides were a cause of an oily exhaust, inlet manifold vacuum drawing oil down the valve guides. Certainly was on 'A' series engines in my misspent youth.
The CNMSL parts listing shows the inlet valve seal as in two parts, but the aftermarket ones are just a single seal.
Confusingly, Wemoto list seals for both inlet AND exhaust, think this is a longstanding error on their part.