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Sprint Valve Stem Seals
Posted: Fri Jul 29, 2016 1:56 pm
by dursley92
My Sprint engine gets a bit smokey on hot idling and produces a big blue cloud on hot starting. It doesn't seem to use hardly any oil though so I am assuming its the valve stem seals and I am just refurbishing another Sprint head to swap over.
Stripping the spare head I discover its got seals on all 16 valves which was a surprise!
Anyone else have any opinions on this?
Re: Sprint Valve Stem Seals
Posted: Fri Jul 29, 2016 3:14 pm
by SprintMWU773V
I used to find that my Sprint would smoke quite a bit on startup following an extended layup. I put this down to oil leaking from the head into the combustion chamber caused by tired valve stem oil seals. Mine was much more of a white smoke though rather than Blue.
Re: Sprint Valve Stem Seals
Posted: Sat Jul 30, 2016 5:03 pm
by dursley92
What about the seals on all 16 valves?
Re: Sprint Valve Stem Seals
Posted: Sat Jul 30, 2016 8:13 pm
by tony g
Someone has tried to cure a smokey issue before maybe? Cant do much harm fitting them If you plan on adding to the new head get a set or 2 of mini a + engine valve seals. Better quality seals are available for a series and they are the same size as sprint
Tony
Re: Sprint Valve Stem Seals
Posted: Mon Aug 01, 2016 6:02 pm
by dursley92
tony g wrote:Someone has tried to cure a smokey issue before maybe? Cant do much harm fitting them If you plan on adding to the new head get a set or 2 of mini a + engine valve seals. Better quality seals are available for a series and they are the same size as sprint
Tony
Already done that!