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Hi Lindsay,
The air flow direction is normally from the servo to the inlet manifold so =
fuel shouldn't get into the servo BUT if the non return valve on the inlet =
manifold (it is incorporated in the nipple that the servo vacuum hose conne=
cts to) then fuel laden air can, and does, make its way into the servo.
Check that non return valve on the inlet manifold it should prevent any flo=
w towards the servo.
Michael S
BN1 #174=20
-----Original Message-----
From: "R. Price Lindsay" <050.rpl@gmail.com>
Sent: =E2=80=8E30/=E2=80=8E12/=E2=80=8E2015 6:09 p.m.
To: "Healey List" <healeys@autox.team.net>
Subject: [Healeys] fuel in Brake Booster
Listers -=0A=
=0A=
A couple of weeks ago my brakes were acting funny. It turned out that all =
of the fluid was out of the brake/clutch reservoir. I sent the brake servo=
into be repaired at the suggestion of the list. I just talked to the rebu=
ilder and he said the baffle in the servo was swollen because of a large am=
ount of fuel present in the booster. He mentioned this is not unusual with=
TR6=E2=80=9Ds. I guess this can cause the servo to fail and draw the bra=
ke fluid into the servo.=0A=
=0A=
Now that the servo is fixed, I don=E2=80=99t want a repeat the problem and =
am searching for a cause for the presence of fuel. A few months ago I was =
having a problem with fuel starvation. It turned out to be a pinched fuel =
line. During my long search I made a number of changes including installin=
g a new distributor cap and wires. Somehow I switched a couple of wires an=
d could not get a spark in cylinders 5 & 6. I found the problem after quit=
e a bit of trying to get the car to run smoothly and driving it for 20 - 30=
miles. Also, maybe a contributing factor or maybe not, a year or two ago =
I moved the vacuum hose to the induction manifold because I installed air c=
leaners without a connection point for the vacuum hose. (Before the fuel st=
arvation issue I reinstalled the original air cleaners and moved the vacuum=
hose back up to the air rear cleaner.)=0A=
=0A=
Now for my question: Could the presence of fuel in the brake booster have b=
een caused when I was not getting spark and not burning fuel in 5 & 6? Cou=
ld the unspent fuel have been sucked into the servo through the induction m=
anifold a while ago, or through the air cleaners recently?=0A=
=0A=
Thank you so much for your collective thoughts.=0A=
=0A=
Price Lindsay=0A=
67 BJ8=0A=
=0A=
=0A=
_______________________________________________=0A=
Archive: http://www.team.net/archive=0A=
=0A=
Healeys@autox.team.net=0A=
http://autox.team.net/mailman/listinfo/healeys=0A=
=0A=
lter@gmail.com=0A=
=0A=
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
=3Dutf-8"></head><body><div><div style=3D"font-family: Calibri,sans-serif; =
font-size: 11pt;">Hi Lindsay,<br>The air flow direction is normally from th=
e servo to the inlet manifold so fuel shouldn't get into the servo BUT if t=
he non return valve on the inlet manifold (it is incorporated in the nipple=
that the servo vacuum hose connects to) then fuel laden air can, and does,=
make its way into the servo.<br>Check that non return valve on the inlet m=
anifold it should prevent any flow towards the servo.<br><br>Michael S<br>B=
N1 #174 </div></div><div dir=3D"ltr"><hr><span style=3D"font-family: Calibr=
i,sans-serif; font-size: 11pt; font-weight: bold;">From: </span><span style=
=3D"font-family: Calibri,sans-serif; font-size: 11pt;"><a href=3D"mailto:05=
0.rpl@gmail.com">R. Price Lindsay</a></span><br><span style=3D"font-family:=
Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Sent: </span><spa=
n style=3D"font-family: Calibri,sans-serif; font-size: 11pt;">=E2=80=8E30/=
=E2=80=8E12/=E2=80=8E2015 6:09 p.m.</span><br><span style=3D"font-family: C=
alibri,sans-serif; font-size: 11pt; font-weight: bold;">To: </span><span st=
yle=3D"font-family: Calibri,sans-serif; font-size: 11pt;"><a href=3D"mailto=
:healeys@autox.team.net">Healey List</a></span><br><span style=3D"font-fami=
ly: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Subject: </spa=
n><span style=3D"font-family: Calibri,sans-serif; font-size: 11pt;">[Healey=
s] fuel in Brake Booster</span><br><br></div>Listers -<br><br>A couple of w=
eeks ago my brakes were acting funny. It turned out that all of the f=
luid was out of the brake/clutch reservoir. I sent the brake servo in=
to be repaired at the suggestion of the list. I just talked to the re=
builder and he said the baffle in the servo was swollen because of a large =
amount of fuel present in the booster. He mentioned this is not unusu=
al with TR6=E2=80=9Ds. I guess this can cause the servo to fail and&n=
bsp; draw the brake fluid into the servo.<br><br>Now that the servo is fixe=
d, I don=E2=80=99t want a repeat the problem and am searching for a cause f=
or the presence of fuel. A few months ago I was having a problem with=
fuel starvation. It turned out to be a pinched fuel line. Duri=
ng my long search I made a number of changes including installing a new dis=
tributor cap and wires. Somehow I switched a couple of wires and coul=
d not get a spark in cylinders 5 & 6. I found the problem after q=
uite a bit of trying to get the car to run smoothly and driving it for 20 -=
30 miles. Also, maybe a contributing factor or maybe not, a year or =
two ago I moved the vacuum hose to the induction manifold because I install=
ed air cleaners without a connection point for the vacuum hose. (Before the=
fuel starvation issue I reinstalled the original air cleaners and moved th=
e vacuum hose back up to the air rear cleaner.)<br><br>Now for my question:=
Could the presence of fuel in the brake booster have been caused when I wa=
s not getting spark and not burning fuel in 5 & 6? Could the unsp=
ent fuel have been sucked into the servo through the induction manifold a w=
hile ago, or through the air cleaners recently?<br><br>Thank you so much fo=
r your collective thoughts.<br><br>Price Lindsay<br>67 BJ8<br><br><br>_____=
__________________________________________<br>Support Team.Net http://www.t=
eam.net/donate.html<br>Suggested annual donation $12.75<br>Archive: h=
ttp://www.team.net/archive<br>Forums: http://www.team.net/forums<br><br>Hea=
leys@autox.team.net<br>http://autox.team.net/mailman/listinfo/healeys<br><b=
r>Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/michael=
salter@gmail.com<br><br></body></html>=
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_______________________________________________
Archive: http://www.team.net/archive
Healeys@autox.team.net
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