204 Hot
feet cured! Nick Grant (Woodcote Green 0388) from Tyne &
Wear was concerned that the legwell air vents were permanently blowing hot air
onto his feet. - fine in winter but with the approach of Summer he was wondering
how to cure it! Fellow members provided help. (May 04)
Nick contacted
the V8 Registrar saying "I am the proud owner of an immaculate RV8 which
has only done 9,300 miles and "touch wood", everything appears to be
running well. However never having owned a convertible before I am wondering whether
it is normal for the air from the legwell vents to be permanently blowing hot
air on both the driver's feet and those of the passenger!" He mentioned
he had obviously checked that the heater control in the cockpit was set to cold
and directed the air to the screen, but still had a constant blast of hot air
in the legwell. Dr Gavin Bailey (BRG 0766) responded with some
thoughts - "it is normal for the legwells to get warm as the catalysts
on the exhaust system are under the floor on both sides. However you mention hot
air coming from the vents into the legwells so assuming the heater fan is not
on, I would check the rotary heater controls are actually working and that the
temperature control is effectively operating the rotary control with someone under
the bonnet checking the solid rod from the heater control, is in fact moving the
arm of the heater control valve. The valve is an inline unit and I think is located
near the heater motor - my car is not near at hand to check at present!"
Brian Moyse
(BRG 1714) added "I had you problem when I first bought my RV8 and found
it was the heater valve - or rather the control cable connected to it - that needed
adjustment. Lift the bonnet and the valve is located close to the right nearside
end of the heater assembly below the windscreen scuttle in the water hose. As
it is a water valve type of control, the adjustment is rather crude and even if
the valve is cracked open just a little, hot water will flow to the heater matrix
and then provide hot air in the car". Nick
Grant set about investigating and reported "the |
first problem I found was there is a three position flap in the air box which
would not close and consequently allowed a constant blow of air to come into the
legwell. Since that air was hot, really hot feet ensued! A small cable running
in a sheath had slipped from its catch, so I have re-secured it. There also appears
to be a small piece of foam from inside the unit has fallen out and this has glued
itself to the bulkhead under the flap". Nick later reported he had found
the cable leading to the heater valve control had slipped in its clasp and thereby
allowed the heater valve to remain slightly open all the time - even when the
heater control in the cockpit appeared to be "closed" if you see what
I mean! Subsequently Nick reported this had cured the difficulty "simply
by slackening off the screw (No 2 in the diagram) and pulling the cable to the
right, making sure the temperature control inside the cockpit set to "Cold",
to ensure the valve was fully closed. You then re-secure the clasp and tighten
the screw". Nick was delighted to find that hot air no longer came through
the legwell vents when the heater control knob was set to "cold". Hopefully
now the hot feet difficulty will no longer ruin his enjoyment of the car in warmer
weather. 
RV8 heater control valve showing the clamp (2). (Diagram: RV8
Repair Manual - MG Rover) We
also recommended Nick get hold of a copy of the RV8
Technical Information CD with the essential RV8 Repair Manual and gearbox
manuals for the LT77S and R380 which he confirmed he was doing. Full details are
on the V8 Website - the CDs are available from MG, Brown & Gammons and Clive
Wheatley mgv8parts.
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