 Heat exchanger/heater duct sequence question, ...should have taken notes on this |
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| jack20 |
 Apr 20 2016, 06:39 PM
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#1
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Member  Group: Members Posts: 406 Joined: 7-November 14 From: Granite Bay, CA Member No.: 18,099 Region Association: Northern California 
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Something I thought would be a no-brainier has turned into frustration. I'm reinstalling the tins, heat exchangers and ducting and ran into a fit problem. Doesn't seem that others have had the problem because my research came up empty.
What is the sequence of installation? Heat exchanger first or the duct piece first? Thanks, Jack This piece:  |
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| TheCabinetmaker |
Apr 20 2016, 07:03 PM
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#2
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Jack, heat exchangers first, then the piece in your pic, then the j tube, then branch tube, then heater valve. It can be tricky, but it will go. Don't forget the small flaps that hang from the fan shroud openings.
Btw, your shims were taken to the post office this afternoon. |
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| jack20 |
Apr 20 2016, 11:20 PM
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#3
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Member Group: Members Posts: 406 Joined: 7-November 14 From: Granite Bay, CA Member No.: 18,099 Region Association: Northern California
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Thanks very much Curt!
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| SA-914 |
Apr 22 2016, 01:16 PM
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#4
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Member Group: Members Posts: 125 Joined: 30-June 14 From: San Antonio,tx Member No.: 17,566 Region Association: Southwest Region |
What do the flaps do? Mine are missing.
Also, my square duct covers don't fit very well? |
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| Dave_Darling |
Apr 22 2016, 09:36 PM
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#5
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914 Idiot Group: Members Posts: 14,990 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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The flaps will keep the aux blower fan from pushing air from the exchanger back into the fan shroud.
The square covers, if I understand what you mean, are unique from side to side. Try swapping them and see if they fit better. --DD |
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| barefoot |
Apr 23 2016, 04:39 AM
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#6
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Senior Member Group: Members Posts: 1,276 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States
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QUOTE(Dave_Darling @ Apr 22 2016, 11:36 PM)  The flaps will keep the aux blower fan from pushing air from the exchanger back into the fan shroud. --DD If you're not using the aux heater blower, then these little flappers are not needed. Well, that's my plan anyway. |
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| rgalla9146 |
Apr 23 2016, 05:15 AM
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#7
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Advanced Member Group: Members Posts: 4,559 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None
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Before installing, do a trial fit of all the parts on the bench.
Especially the tubes and valves. Make certain the tubes can properly enter the valves. |
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| Gunn1 |
Apr 23 2016, 05:49 AM
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#8
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Senior Member Group: Members Posts: 1,021 Joined: 14-February 16 From: Minnesota Member No.: 19,670 Region Association: None |
Is the aux blower feature really needed?
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| BeatNavy |
Apr 23 2016, 05:53 AM
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#9
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Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region
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No, not really. It's real purpose is to force air through the HE's when the engine speed isn't high enough to do so (e.g., while idling). If you don't put the aux blower on then it's been recommended you cap the J-tubes on each left/right engine shelf to prevent hot air making it's way up into the engine bay. That's they way I'm running right now.
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| rhodyguy |
Apr 23 2016, 06:47 AM
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#10
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,081 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
Plus, lack of the 2 doors on the shroud and uncapped j tubes makes for poor heating. REALLY poor. The heat system delivers when the design components are serviceable and in place.
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| SA-914 |
Apr 23 2016, 06:50 AM
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#11
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Member Group: Members Posts: 125 Joined: 30-June 14 From: San Antonio,tx Member No.: 17,566 Region Association: Southwest Region |
Would you get better engine cooling by blocking the fan shroud flaps, and just relying on the aux blower for all the air, and using the motor fan just for motor cooling?
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| Amphicar770 |
Apr 24 2016, 08:52 AM
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#12
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Senior Member Group: Members Posts: 1,191 Joined: 20-April 10 From: PA, USA Member No.: 11,639 Region Association: MidAtlantic Region
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Take lots of pics and notes. I am a few steps behind you. :-)
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