Heater Core Bypass
Thread Starter
Intermediate
Joined: Jan 2011
Posts: 25
Likes: 0
From: Oshkosh WI
Heater Core Bypass
Good Day Folks, New to the forum and new to the sport. My boys and I are working with a 74 with the 350 J motor. We've redone the brakes, and now it's time to do some motor work. I'm replacing the water pump and alternator, more to be proactive than recognizing any problems. Question is, I want to bypass the heater core, can anyone help with the routing of the hoses from the pump and intake? Thanks in advance for the help.
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 786
From: Lebanon Township New Jersey
That's what I did on mine. Been working fine for years and it gets rid of ugly hoses under the hood. BTW, the plugs are pipe thread sizes.
Team Owner
Joined: Mar 2002
Posts: 24,160
Likes: 78
Brass ones, Home Depot or Lowes
Just be sure there's a little bypass hole in your thermostat. And if there's not, then drill one through it. You want some coolant moving past it at all times.
Burning Brakes
Joined: Jan 2006
Posts: 1,223
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From: Fort Wayne IN
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Race Director
Joined: Jul 2004
Posts: 12,705
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From: Scottsdale Arizona
In any case, I agree with the rest; just use a simple pipe plug. A little sealer won't hurt but isn't totally necessary.
Le Mans Master
Joined: Jan 2003
Posts: 6,575
Likes: 1
From: Tuttle OK
Cruise-In VIII Veteran
I wouldn't block one off other than a temporary fix.
Having a heater is handy. Even when it's warm, a defroster once in a while can be nice.
Just an opinion, your mileage may vary.
Having a heater is handy. Even when it's warm, a defroster once in a while can be nice.
Just an opinion, your mileage may vary.
Burning Brakes
Joined: Oct 2003
Posts: 1,090
Likes: 74
From: New Carlisle IN
Thread Starter
Intermediate
Joined: Jan 2011
Posts: 25
Likes: 0
From: Oshkosh WI
U17 - Good point about the weather. I work at a company just east of the north/south runway. On my way to the office yesterday morning, the thermometer on the car said -12F. But without the humidity, it's a dry heat. Thanks for all the input folks. G
Melting Slicks
Joined: Oct 2002
Posts: 2,317
Likes: 111
From: St Louis MO
The threads in the holes for the heater hoses are both 1/2 NPT. As far as type of plug, I wouldn't use brass plugs because aluminum and brass have different galvanic potential and will cause corrosion of the less noble metal (aluminum). It's better to use aluminum plugs in an aluminum manifold, and iron pipe plugs in a cast iron water pump.
