[Mgs] heater core leak advice

[Max Heim]

If you're really concerned, buy the new heater core now and fit it into your
bypass loop, locating it somewhere with some airflow, as an auxiliary
radiator.

If your MG is running hot at highway speeds, there is definitely something
unusual going on (bad timing, clogged radiator, crud in the water passages).
Mine only climbs off the 190 mark if it is sitting still after running fast
in hot weather, or in bumper-to-bumper traffic.


--

Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires

on 7/15/07 6:53 AM, Aaron Whiteman at awhitema at panix.com wrote:

> On Jul 15, 2007, at 2:15 AM, Paul Hunt wrote:
> 
>> Not only that, but in the summer it is probably off i.e. not
>> flowing any coolant anyway.  If your valve shuts off fully then you
>> can get away with removing the left-hand (facing forwards)  hose
>> i.e. the one that connects to the pipe by the rocker cover from the
>> heater and plugging it with an old spark-plug and hose clip.
> 
> The valve is new within the last few years and does not leak, but
> just to be safe, I completely bypassed the core anyway.  2 feet of
> heater hose (more than required) and two bypass caps are less than $5
> and the job is done.
> 
> My concern re: the heater was not as much providing heat to the
> cabin, but to provide additional cooling capacity to the engine.  It
> was never a particularly effective option in the past, but I felt
> safer having it.
> 
>> If your summer is anything like ours i.e. raining every day you
>> might need to clear the screen from time to time, but the air
>> direction and flow will be just the same, and cold air is actually
>> better at that than hot anyway.
> 
> Pullman is in a rain shadow.  Our summer is typically highs from
> 85-100, lows 50-60.  The only rain is in the form of thunderstorms,
> which bring with them hail and often fire.
> 
> We do see rain fairly often in the spring, but that's passed.
> 
> Of course, I'll be driving to California along the coast highway.  I
> fully expect to see plenty of fog and some rain.  The return will be
> on the eastern side of the Oregon Cascades, so I expect a hot and dry
> trip.
> 
> I think I got the timing back where it belongs, so I'll go out and
> test it later today when it warms up.  It's only 57 now, hardly
> stressful temperatures.