On Sun, 24 Nov 1996 08:13:06 -0800 Jim Boyd <gumby@joshuanet.com> writes:
>Hey Listers:
>
>This recent "condensation" thread got me thinking about my '67 GT
>which
>has perpetual problems while driving during the winter. Then a friend
>stopped by yesterday with his GT and told me how he flushed the heater
>core out with a garden hose and a high pressure garden type
>attachment.
>He removed both heater hoses from the engine and stuck the garden hose
>into the heater hoses, one at a time. He said he was shocked to see
>sand, dirt, pine needles and other garbage fow out of the heater! Now
>he reports that there is TONS more air flow when defrosting the
>windscreen. This sounds like a cheap approach to restore the heater
>to
>original capacity. Anyone out there tried this?
>
>Also, I would like to replace my original single speed heater with a
>late model MG 2 speed heater. Will this simply bolt in? What year
>did
>BL start using the 2 speed heater? I think it must have been around
>1975 or so. I checked on the price for a three position switch (off,
>low, high) that is the early ('62-'66) headlight switch. It costs
>about
>$30.00, from our local Moss distributor, which is a little too pricey
>for me! Anyone know of a less expensive vendor for the same switch?
>
>Thanks in advance for your help!
>
>Cheers from rainy (more to come) California!
>Jim
>
The heater has a wet part, through which the engine coolant flows, and a
dry part, through which air flows. If your friend had pine straw, sand
and such in the wet part, he had serious problems. The wet part can
become clogged with sludge if not properly maintained, but unclogging it
will not increase the airflow. It will improve the transfer of heat.
For better airflow you need to clean the cooling fins on the heater core
in the dry part. That is where you are likley to find the kind of junk
you were talking about. I don't know how you get at it on an MG, but I
think a vacuum cleaner would be the appropriate tool.
Mark Anderton
1972 Triumph TR6 (daily driver)
1984 Jaguar XJ6 (2 ea - some people never learn)
1966 Morris Minor (everything a car should be)
1971 Land Rover
1967 Daimler V8 Saloon
1958 Velocette MSS (500cc single)
|