mikev88 Posted July 20, 2018 Share #97 Posted July 20, 2018 On 7/18/2018 at 7:01 PM, grannyknot said: I might be borrowing heavily from your design, looks great. The Four Seasons 74604 I guess is a vacuum unit for the A/C? Yes, I wanted to replace this stock valve which , according to my analysis is a normally closed valve although my seals were so rotten it wasn't anymore! If your car has no AC I think you don't need it. 1 Link to comment Share on other sites More sharing options...
mikev88 Posted July 24, 2018 Share #98 Posted July 24, 2018 I was chasing a few vacuum problems, but everything now seems to work well. The vacuum valves operates and the heater valve seems to do a good job at stopping flow when closed, air became warm only when i opened it. Space is no problem, probably not necessary to trim the core pipe too. 1 Link to comment Share on other sites More sharing options...
Captain Obvious Posted July 25, 2018 Author Share #99 Posted July 25, 2018 Looks great! And one of the best parts is now that you've done it, you can get a cheap reliable replacement core if necessary! 10 hours ago, mikev88 said: probably not necessary to trim the core pipe too. That was my conclusion as well. Trimming and re-beading the tubes makes the hose routing a little more forgiving, but it's not a requirement. Not everyone needs to build themselves a bead forming tool. Link to comment Share on other sites More sharing options...
JagoBlitz Posted February 23, 2023 Share #100 Posted February 23, 2023 Does anybody have a good replacement heater core that fits into a 280z? The recommended part from the Ford Escort is a little too wide. Link to comment Share on other sites More sharing options...
HusseinHolland Posted March 23, 2023 Share #101 Posted March 23, 2023 On 7/19/2018 at 9:45 PM, mikev88 said: Yes, I wanted to replace this stock valve which , according to my analysis is a normally closed valve although my seals were so rotten it wasn't anymore! If your car has no AC I think you don't need it. Is this new valve in your post the 4 seasons part, or an OEM valve? I'm assuming OEM, since it has the I/O tubes? My 75 280Z has AC, but looking up under the dash, I don't see the bulkhead valve, only a heater valve. All the lAC lines look 'universal" with the hose clamp fittings, not crimped lines, so mine is perhaps a dealer installed version? Maybe that's why he said the AC never really worked, because there is no positive heat shut off? This leads to another question - if the dealer kit differs from factory, would that mean the control head also has no vacuum switching? If I add the positive shut off valve, I will need a switched vacuum source to activate it... Link to comment Share on other sites More sharing options...
Yarb Posted March 23, 2023 Share #102 Posted March 23, 2023 My dealer installed system was all mechanical. Link to comment Share on other sites More sharing options...
SteveJ Posted March 23, 2023 Share #103 Posted March 23, 2023 @HusseinHolland If you go to my YouTube channel (myZcarlife), I have a short video where I show the features of the stock AC controls/evaporator. If your system doesn't have those features, it's not stock. Link to comment Share on other sites More sharing options...
Captain Obvious Posted March 23, 2023 Author Share #104 Posted March 23, 2023 2 hours ago, HusseinHolland said: This leads to another question - if the dealer kit differs from factory, would that mean the control head also has no vacuum switching? If I add the positive shut off valve, I will need a switched vacuum source to activate it... Can you snap a couple pics of what you have. Should be pretty easy to tell if it's factory or aftermarket. Link to comment Share on other sites More sharing options...
HusseinHolland Posted March 23, 2023 Share #105 Posted March 23, 2023 (edited) 1 hour ago, SteveJ said: @HusseinHolland If you go to my YouTube channel (myZcarlife), I have a short video where I show the features of the stock AC controls/evaporator. If your system doesn't have those features, it's not stock. Thank you - I'll check it out. EDIT - I saw a recent one with the control head, is that what you meant? I didn't see a more detailed one scrolling through your video library 1 hour ago, Captain Obvious said: Can you snap a couple pics of what you have. Should be pretty easy to tell if it's factory or aftermarket. I'll do that. I tried to take a pic yesterday, but I didn't have sufficient lighting. Edited March 23, 2023 by HusseinHolland Link to comment Share on other sites More sharing options...
SteveJ Posted March 23, 2023 Share #106 Posted March 23, 2023 39 minutes ago, HusseinHolland said: Thank you - I'll check it out. EDIT - I saw a recent one with the control head, is that what you meant? I didn't see a more detailed one scrolling through your video library I'll do that. I tried to take a pic yesterday, but I didn't have sufficient lighting. It wasn't that long ago that I made the video. I'm pretty sure I talked about the vacuum control and where it went. Link to comment Share on other sites More sharing options...
Yarb Posted March 23, 2023 Share #107 Posted March 23, 2023 Normally you can tell by the control panel. Factory AC and air cond on the panel. Mine did not. Link to comment Share on other sites More sharing options...
HusseinHolland Posted March 30, 2023 Share #108 Posted March 30, 2023 On 3/23/2023 at 10:12 AM, Captain Obvious said: Can you snap a couple pics of what you have. Should be pretty easy to tell if it's factory or aftermarket. Had time to get a pic up under the dash - looks to me like the stock non-AC setup? Link to comment Share on other sites More sharing options...
Parman
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now