Hotter Heater ?
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Fleet Mechanic
Joined: Dec 2006
Posts: 1,338
Likes: 6
From: UPSTATE NY
okay i'll give that a shot too, but like i said i can hold the valve up, open it manually and see straight through the puppy, and it doesnt bind or jam up whatsoever.
Posting Guru
Joined: Mar 2003
Posts: 1,246
Likes: 3
in an older vehicle it has probably seen a lot of hard water in it's day and that is why they clog up. modern way is to use distilled water.if you backflush it and it''s still not right i would get a new core.
Junior User
Joined: Apr 2009
Posts: 85
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so I was just reading this thread like yesterday and now today my heater core springs a leak Lol. So I figure im going to take the time and plug the airvent while im down there. My question is are you guys plugging the vent and leaving the rubber boot off so It can draw air in from the cab?
Elder User
Joined: Jun 1999
Posts: 940
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From: LAT 46.55501° & LON -122
I would look for a different core. Even when new, some may be more efficient than others at transfering heat. Maybe there are some aftermarket ones out there that are larger or have more rows or made from aluminum with thinner wall core tubes?
Maybe there is a way you could add a second core to the system; a sort of heater pre-heater that could be teed-in parallel with the existing core's hoses?
I would have to be against blocking the fresh air intake. Fresh air is usually drier and helps keep the windows clear. The fresh intake also increases the air pressure inside the cab which helps keep engine bay & exhaust fumes from entering as well as any slight water leaks that may have developed over 40 years of time. And besides, who wants to breathe stale air?
Kris
Maybe there is a way you could add a second core to the system; a sort of heater pre-heater that could be teed-in parallel with the existing core's hoses?
I would have to be against blocking the fresh air intake. Fresh air is usually drier and helps keep the windows clear. The fresh intake also increases the air pressure inside the cab which helps keep engine bay & exhaust fumes from entering as well as any slight water leaks that may have developed over 40 years of time. And besides, who wants to breathe stale air?
Kris
Elder User
Joined: Feb 2003
Posts: 674
Likes: 0
The correct thermostat should be 205, replace the heater core with a high quality unit (pay the price if you truly want hot heat), do not close off the fresh air. This should work, if not get an electric unit and be done with it!
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
There is pretty much a single heater core not fancy upgrades.
Why do you say do close off fresh air. I am getting a damn plenty from other sources in my cab.
John
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