Cantedvalve 128 Report post Posted November 28, 2018 Talking about the holes in the firewall. I am going to attempt to reconnect my heater at the urging of my son (core has been replaced previously), and I am making some SS hard lines. Given the way I have to bend them, I have to get it right the first time. So which one, top or bottom, is the feed line (which on a Cleveland, connects to the block behind the alternator)? By process of elimination, I can figure out which one is return :) Quote Share this post Link to post Share on other sites
Cantedvalve 128 Report post Posted November 28, 2018 Okay, my research says the LOWER hose (as seen at the firewall) is the feed, where the upper is the return. The explanation I found was that this helps eliminate air from the system. Anyone care to agree or disagree? Quote Share this post Link to post Share on other sites
RPM 1,190 Report post Posted November 28, 2018 Right you are Karnac. But since you're not trying to cool the fluid like in the radiator, does it really matter? Quote Share this post Link to post Share on other sites
Cantedvalve 128 Report post Posted November 28, 2018 Probably not, but this isn’t Australia... we don’t do things backwards... or upside down :) 2 MAC390 and RPM reacted to this Quote Share this post Link to post Share on other sites
Brian Conway 264 Report post Posted November 28, 2018 From the 69 Shop Manual. 1 mwye0627 reacted to this Quote Share this post Link to post Share on other sites
aslanefe 333 Report post Posted November 28, 2018 9 hours ago, RPM said: Right you are Karnac. But since you're not trying to cool the fluid like in the radiator, does it really matter? Heater core is not for cooling the fluid but it is for getting the heat out of the fluid to heat the cabin. If there is air in the heater core, then less heat will be extracted. This may not be an issue for you in Cali but people who live in colder areas may like to get the most heat from their heater. Quote Share this post Link to post Share on other sites
RPM 1,190 Report post Posted November 28, 2018 Hey, I agreed with CV on the correct line routing and the difference from a radiator. I'm just saying the heater core can't be the only place in the system where you might get an air pocket, and it wouldn't be the end of the world if you happened to hook them up backwards. And btw, it does get chilly here in Cali. Just the other day it got down into the 40's and I had to turn on the heater :) Got so hot I had to turn it down. Quote Share this post Link to post Share on other sites
Brian Conway 264 Report post Posted November 28, 2018 I use the heater and defroster in my 65. The 69 the heater/defroster not so much The 428 motor keeps everything pretty warm year round. Brian 2 Caseyrhe and RPM reacted to this Quote Share this post Link to post Share on other sites
MAC390 327 Report post Posted November 29, 2018 Hey ??? what's all this upside down and back to front business, all the merican cars down here all know which way is up.(our way)lol All these cars are happy in their new country. 1 unilec reacted to this Quote Share this post Link to post Share on other sites
barnett468 418 Report post Posted November 29, 2018 Uh...looks like we got a yank vs an ozzie thing brewin. I better get the popcorn out. Quote Share this post Link to post Share on other sites
barnett468 418 Report post Posted November 29, 2018 5 hours ago, MAC390 said: All these cars are happy in their new country. Yeah but I doubt they are happy that you put their steering wheels on the "wrong" side. 1 RPM reacted to this Quote Share this post Link to post Share on other sites
MAC390 327 Report post Posted November 29, 2018 That is optional , you don't have to, all cars imported into the country which are over 35 years old can stay lhd. At that show over 500 cars and about 10% of them were converted rhd. Quote Share this post Link to post Share on other sites
MAC390 327 Report post Posted November 29, 2018 The Mercury was conveted when the car arrived in 1969and was new. All cars then had to be rhd. The new Mustangs are factory built rhd. Quote Share this post Link to post Share on other sites
bigmal 225 Report post Posted November 30, 2018 1 RPM reacted to this Quote Share this post Link to post Share on other sites
Alan_Mac 48 Report post Posted December 22, 2018 On 11/28/2018 at 7:48 AM, aslanefe said: Heater core is not for cooling the fluid but it is for getting the heat out of the fluid to heat the cabin. If there is air in the heater core, then less heat will be extracted. This may not be an issue for you in Cali but people who live in colder areas may like to get the most heat from their heater. Well I just found out that my 70 351w heater hoses are reversed. HaHa they have been that way forever. I don't see how this could affect anything. Quote Share this post Link to post Share on other sites
RPM 1,190 Report post Posted December 22, 2018 Don't tell anyone Alan, but mine are too. It must be doing some serious damage as the heater keeps me quite toasty with the lever halfway between cool and warm, and the motor will idle all day long at 185* and hit195-200* while driving. I'd switch them but one hose is too short. C'est la vie. Quote Share this post Link to post Share on other sites
Alan_Mac 48 Report post Posted December 22, 2018 The heater hoses route better when reversed. The heater core flow will be the same if the fluid moves from from top to bottom or bottom to top. 1 RPM reacted to this Quote Share this post Link to post Share on other sites
aslanefe 333 Report post Posted December 23, 2018 On 12/21/2018 at 10:21 PM, Alan_Mac said: Well I just found out that my 70 351w heater hoses are reversed. HaHa they have been that way forever. I don't see how this could affect anything. If you do not have air in your heater core, there won't be any effects. If you have air in the heater core, you won't get as much heat out of the heater. Quote Share this post Link to post Share on other sites
