Technical Tips > Radiators - Cooling

427 Water Pump By Pass

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sirfixalot:
Does anyone know why a big block has a 3/4" hose from waterpump to inlet manifold it effectively by passes water going thru engine

bfit:
now that is a good question

A guess at this
if we are talking about the hose that come  from the top of the water pump  to  the front of the manifold  under the regulator ( thermostat )

I would think this is part of the by pass system  that allow the engine to heat up   to operation temp before   the regulator  starts to circulate water  through the radiator.

Is there a by pass type regulator in the manifold
Are you having overheating problems

Bfit  

bfit:

is that  the hose RH middle of photo
Bfit

sirfixalot:
Yep thats the little sucker motor overheats so today I have flushed block, radiator, checked impellor in pump all looks good so only thing I can think of is water is taking path of least resistance thru the pipe I have now capped off the 2 holes & drilled a 1/8" hole in thermostat. I have also fabricated block off panels for top & bottom of radiator. I am also going to fit a 7 blade fan in place of the 5 blade on it now.I also found a blob of solder was under seat for radiator cap where the overflow pipe has been previously repaired so coolant pumps straight out as soon as there is any expansion

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