Chris Kantarjiev writes:
> As always, it depends.
>
> If the rest of your engine seals well, then the PCV valve probably doesn't
> matter much, except possibly as a flame trap.
So that's what that big breather thing is! Is it really a PCV valve,
or just a breather? My later TR6 has just a straight hose from the
carbs to valve cover, and also to the charcoal canister. The '70 and
'71 TR6's have this breather, but I thought it was just a filter of
some sort. (I've never checked as I just aquired the '70 TR6 a few
months ago, and it's not on the road yet.)
> If the rest of your engine doesn't seal well (like, through the oil filler,
> around the valve cover, the dipstick...), then you may have a huge vacuum
>leak,
> though that pipe and the engine. You should notice a difference in the idle as
> you pull the oil filler cap off and allow outside air into the carbs. If you
> don't, you have a leak.
Very true. I guess the later cars assumed that the engine didn't have
any leaks. :-)
I've never run with a PCV valve on my '75 TR6. It never had one since
new. It runs great, but I always wondered if a PCV valve would make
it better. My gut reaction is that it doesnt need it, yet having one
could help if there are vacuum leaks in other places. Comments?
-Scotty
'70 TR6
'75 TR6
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