Subject: [TR] 71 GT6 (TR-6, TR250 similar?) gulp valve (PCV system) - too much vacuum

From: aribert neumann <[email-masked]>
Date: Sat, 23 Feb 2019 21:44:45 -0500

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Greetings all:

While replacing the hose to the gulp valve (I think this is the name for
the PCV device, mine has a flat top with a steel plate that is clipped to
the valve housing) the valve plate retainer wire popped off and I managed
to loose the detail under the diaphram (part that distributes the spring
force to the underside to the diaphram).  This part is presumed lost
somewhere on top of the trans.  Was unable to find it using mirrors,
flashlights, flexible pick-up claws and even an endoscope.  I tried to
substitute a fender washer for the missing part.  The valve is not
functioning properly and there appears to be excessive vacuum in the
engine.  At idle the engine makes a chirping sound - when I remove the oil
filler cap the sound goes away.  Here is a short video clip of the sound:
https://youtu.be/xAt-hJltmfQ   About half way thru the video when I remove
the filler cap one can hear the air inrush.  Not on the video, when the
enigne is rev'ed up the chirp becomes a continuous sound.

Originality is not a requirement for this vehicle.  I am guessing that the
missing part is not something I can buy by itself- that I would need to buy
an entire gulp valve. Before I try to find a gulp valve, has anyone used a
more modern PCV valve instead of the gulp valve?  If so, how did it work?
Did you need to do anything other than fitting the PCV valve between the
two hoses?   What valve (from what donor vehicle) did you use?  TIA

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<div dir=3D"ltr"><div dir=3D"ltr"><div>Greetings all:</div><div><br></div><=
div>While replacing the hose to the gulp valve (I think this is the name fo=
r the PCV device, mine has a flat top with a steel plate that is clipped to=
 the valve housing) the valve plate retainer wire popped off and I managed =
to loose the detail under the diaphram (part that distributes the spring fo=
rce to the underside to the diaphram).=C2=A0 This part is presumed lost som=
ewhere on top of the trans.=C2=A0 Was unable to find it using mirrors, flas=
hlights, flexible pick-up claws and even an endoscope.=C2=A0 I tried to sub=
stitute a fender washer for the missing part.=C2=A0 The valve is not functi=
oning properly and there appears to be excessive vacuum in the engine.=C2=
=A0 At idle the engine makes a chirping sound - when I remove the oil fille=
r cap the sound goes away.=C2=A0 Here is a short video clip of the sound:=
=C2=A0 <a href=3D"https://youtu.be/xAt-hJltmfQ">https://youtu.be/xAt-hJltmf=
Q</a>=C2=A0=C2=A0 About half way thru the video when I remove the filler ca=
p one can hear the air inrush.=C2=A0 Not on the video, when the enigne is r=
ev&#39;ed up the chirp becomes a continuous sound.<br></div><div><br></div>=
<div>Originality is not a requirement for this vehicle.=C2=A0 I am guessing=
 that the missing part is not something I can buy by itself- that I would n=
eed to buy an entire gulp valve. Before I try to find a gulp valve, has any=
one used a more modern PCV valve instead of the gulp valve?=C2=A0 If so, ho=
w did it work?=C2=A0 Did you need to do anything other than fitting the PCV=
 valve between the two hoses? =C2=A0 What valve (from what donor vehicle) d=
id you use?=C2=A0 TIA <br></div></div></div>

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From: "Randall" <[email-masked]>
Date: Sun, 24 Feb 2019 21:13:22 -0800

I think you want what is commonly called the PCV (Positive Crankcase
Ventilation) valve.  A gulp valve is something else.

TRF sells a repair kit for the PCV valve that they say is suitable for GT6 2
& 3 for only about $15.  RFK1075

-- Randall 
56 TR3 TS13571L once and future daily driver
71 Stag LE1473 - awaiting engine rebuild
71-2-3 Stag - awaiting gearbox rebuild