[Mgs] Overheating MGB GT

[Dan DiBiase]

" From look of the cap, I suspect that there is sediment in the system and
that radiator is partly blocked. Do this testing then we can evaluate the
problem better. "

That was my first thought as well.

Dan D
'76B, '65B
Central NJ USA
http://dandibiase.cbintouch.com/


On Sun, Oct 25, 2020 at 7:16 AM Robert's New iPad <mgbobh at gmail.com> wrote:

>     Is it known to be running hot because the gauge or a thermometer says
> so?
>     In two tanks or running, assume 500 miles, the loss of two quarts is
> excessive, but you should not be boiling off that much even if the cap is
> rated below 10 psi.
>    The look of that cap suggests corrosion and dirt in the engine and
> radiator.  Has the antifreeze protection been maintained in the last few
> years, the AF being changed every other year?
>    You might consider driving around with the cap loose until engine is
> fully warmed, then putting a kitchen thermometer into the water.  Also, an
> infra-red thermometer used on the thermostat housing and in a pattern
> around the radiator will tell you something.
>     From look of the cap, I suspect that there is sediment in the system
> and that radiator is partly blocked. Do this testing then we can evaluate
> the problem better.
> Bob
>
>
> On Oct 24, 2020, at 10:16 PM, Michael MacLean <rrengineer.mike at att.net>
> wrote:
>
> 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.
> Mike MacLean
> 1969 MGB GT with a 1967 engine.
> 1960 Bugeye 1275 w/Datsun 5 Speed
> 1956 BN2 Lemans
>
> Sent from AT&T Yahoo Mail on Android
> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature>
>
> <Rad Cap.jpg>
>
> <Prestone.jpg>
>
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