I have a 63 mkII sprite with no pollution crud and, what I believe to be,
its original pcv system intact. It consists of a stiff hose coming 6 inches
vertically up from the centre of the intake manifold to a 2inch circular,
flat topped valve with a hose running from the frontside of that to the oil
separator. It keeps the engine under negative pressure i.e partial vaccuum,
with an oil cap that seals or almost seals so that if I remove the oil cap,
the rpm increases. My engine leaks very little, if any oil. I was leaking
some from the oil filter housing but since the last oil change, that has
ceased.
Andy
>From: Ric Otte <otte@cats.ucsc.edu>
>Reply-To: Ric Otte <otte@cats.ucsc.edu>
>To: spridgets@autox.team.net
>Subject: PCV needed?
>Date: Wed, 2 Jun 1999 07:22:43 -0700
>
>Hi,
>
>I've been reading the messages about crankcase ventilation, PCV valves,
>holes in oil fill caps, and am now completely confused. I have a 1275
>(12CD-DA-H 9590) and simply have a hose coming from the oil separator that
>goes up to a nozzle sticking out of the air cleaner housing. It looks to
>me as if in the middle of the intake manifold there is a bolt plugging a
>hole where a PCV valve might have gone, but I've never paid attention to it
>because I assumed the hose goes up to the nozzle on the air cleaner.
>
>I don't have any problem with my valve cover gasket leaking, or leaks from
>the timing chain cover. But I read the "How to Build a Leakproof Engine"
>by Les Myer in the Pdljmpr archives, and it seemed to indicate that a PCV
>was needed to keep sucking the oil in. I do leak oil out the rear, and
>wonder if this is due to not having a PCV valve? I'd certainly be willing
>to put a PCV valve on if it would keep oil from coming out the rear.
>
>The oil filler cap on my 1275 has a small hole in it, but the one on my
>1098 doesn't have the hole. Is it best to keep the hole open (to let air
>in), or is it best to use the one off my 1098, so that I'll suck air in
>through the rear and keep oil in? I can't figure out when one should use
>the cap with the hole and when to use one without the hole. Is it a
>difference between 1098 and 1275 engines?
>
>My car is put together out of many different parts. The car is a HAN6L
>14277, so it looks to me like it originally had a 948 engine. Perhaps that
>is why I have air cleaners with nozzles sticking out of them, since I don't
>think the 948 had PCV valves. Correct?
>
>So, should I keep the setup I have, or would a PCV valve help keep the oil
>in? Does a PCV valve hurt performance in any way?
>
>Thanks,
>
>Ric Otte
>62 Sprite Mk II
>
>
>
|