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Unless you were really driving it hard the 7lb cap wouldn't have been a =
problem - if it IS holding 7lb, although the correct cap would be =
better.
If it took half a gallon to top it back up it must have been half empty. =
The sludge could have been because insufficient coolant was boiling, =
but the question is where the coolant went since you last checked the =
level. Either you have a coolant leak, or maybe a headgasket leak which =
is boiling it out.
In my experience the temp gauge rarely shows a problem when you are =
losing coolant from a system leak, unlike when the engine really is =
running hot and boiling coolant out that way, in which case I'd expect =
to see signs of that brown staining round the outlet from the rad over =
flow port or hose. Head gasket leaks can result in significant temp =
gauge oscillation.
Timing? I have my doubts.
PaulH.
----- Original Message -----=20
I have been having problems with my MGB GT running hot. To start out =
with the simplest things first, I removed the radiator cap and found =
what you see in the picture. Add to that it is a 7 psi cap. My car is =
a 1969 which requires a 10 psi cap. After running out two tanks of gas =
it took half a 50/50 mix antifreeze container to fill the system back =
up. Checking the timing is next.
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<DIV><FONT size=3D2>Unless you were really driving it hard the 7lb cap =
wouldn't=20
have been a problem - if it IS holding 7lb, although the correct =
cap would=20
be better.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>If it took half a gallon to top it back up it =
must have=20
been half empty. The sludge could have been because =
insufficient=20
coolant was boiling, but the question is where the coolant went since =
you last=20
checked the level. Either you have a coolant leak, or maybe a =
headgasket=20
leak which is boiling it out.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>In my experience the temp gauge rarely shows a =
problem when=20
you are losing coolant from a system leak, unlike when the engine really =
is=20
running hot and boiling coolant out that way, in which case I'd expect =
to see=20
signs of that brown staining round the outlet from the rad over flow =
port or=20
hose. Head gasket leaks can result in significant temp gauge=20
oscillation.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Timing? I have my doubts.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>PaulH.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"FONT-FAMILY: times new roman, new york, times, serif; =
FONT-SIZE: 16px"=20
class=3Dydp3bb4de78yahoo-style-wrap>
<DIV id=3Dydp3bb4de78yiv2637017514>I have been having problems with my =
MGB GT=20
running hot. To start out with the simplest things first, I =
removed the=20
radiator cap and found what you see in the picture. Add to that =
it is a=20
7 psi cap. My car is a 1969 which requires a 10 psi cap. =
After=20
running out two tanks of gas it took half a 50/50 mix antifreeze =
container to=20
fill the system back up. Checking the timing is=20
next.</DIV></DIV></BLOCKQUOTE></BODY></HTML>
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