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3/19/2025 11:14 PM  #1


So I opened a can of worms...

I decided to replace the 42 year old, red, heater hoses with proper black ones. Had to remove the center console to get at the hose connections. It was then, I noticed the green drip of anti freeze at the lower corner of the heater box. :-(  Pulled out the heater assembly and yes, there is a tiny leak near the upper nipple. I also noticed that my late brother in law hadn't rebuilt the heater assembly.

There was the remains of 60 year old foam and seals that had disintegrated besides the leaky heater core. Got the parts ordered, now just waiting on them to arrive. Once I get the heater back together (with the proper number on clips - 5 were barely enough) and the new hoses installed, I can go back to my original project of replacing the air cleaner assembly, and I can ops check the snorkel heat valve that I adjusted.
One good thing came of it. I found a ground wire on the windshield wiper motor that was only hanging on by two or three strands of wire.


68 coupe - 351W, 4R70W, 9" 3.25 -- 65 convertible - 289 4v, C4, 8" 3.00
 

3/20/2025 4:50 AM  #2


Re: So I opened a can of worms...

Yeah, sounds like par for the course.  But it'll be that much better when all that other stuff is also fixed!

 

3/20/2025 5:56 AM  #3


Re: So I opened a can of worms...

Yep, there is always something to do.


65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
 

3/20/2025 5:59 AM  #4


Re: So I opened a can of worms...

I can relate.  But now you'll have peace of mind knowing it's all good.  Bonus finding the bad ground wire.

 

3/20/2025 7:17 AM  #5


Re: So I opened a can of worms...


Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
 

3/20/2025 8:11 AM  #6


Re: So I opened a can of worms...

That sucks!  When I added vintage AC I had to pull that heater/AC unit out a couple of times under the dash.  I was hoping I never have to do that again.  

 

3/20/2025 9:15 AM  #7


Re: So I opened a can of worms...

Tip for reinstall:
Use one long heater hose that goes from upper connection, through firewall, then back through firewall to connect to lower hose connection.  That way you can install the clamps on the floorboard and not snaked under the dash. Once the clamps are secure, grab the hose loop and pull from engine compartment. The heatwr box will fall right in position.

Be sure to test the new core before installing it. I use a short length of bicycle tube with the Schrader valve in it. Clamp to each tube, put 15 psi in it and submerge.


Money you enjoy wasting is NOT wasted money... unless your wife finds out.
 

3/20/2025 10:44 AM  #8


Re: So I opened a can of worms...

MS wrote:

Tip for reinstall:
Use one long heater hose that goes from upper connection, through firewall, then back through firewall to connect to lower hose connection. That way you can install the clamps on the floorboard and not snaked under the dash. Once the clamps are secure, grab the hose loop and pull from engine compartment. The heater box will fall right in position.

i

NICE Tip !!
(I just hope I remember it)
 6sal6


Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
 

3/20/2025 7:58 PM  #9


Re: So I opened a can of worms...

MS wrote:

Tip for reinstall:
Use one long heater hose that goes from upper connection, through firewall, then back through firewall to connect to lower hose connection. That way you can install the clamps on the floorboard and not snaked under the dash. Once the clamps are secure, grab the hose loop and pull from engine compartment. The heatwr box will fall right in position.

Be sure to test the new core before installing it. I use a short length of bicycle tube with the Schrader valve in it. Clamp to each tube, put 15 psi in it and submerge.

Thanks MS - I will do that. NPD says my parts will arrive in SIX days...... :-(
 


68 coupe - 351W, 4R70W, 9" 3.25 -- 65 convertible - 289 4v, C4, 8" 3.00
     Thread Starter
 

3/21/2025 4:41 AM  #10


Re: So I opened a can of worms...

Ron, winter is not over in all parts of this wonderful country.

My tractor tires are delayed a day…stuff happens.

In addition to the heater hose trick, I install the screw (leave a little loose) by passenger kick panel to support  heater assembly after placing the studs and hoses through firewall.

This allows the installation of the 4 nuts in engine compartment.

I also place cardboard, floor mat, or kneeling pad over the door sill plate to minimize edge digging into my side.

I have same project…when it warms up some…like 40F. 😂

Last edited by Nos681 (3/21/2025 4:56 AM)

 

3/29/2025 12:17 AM  #11


Re: So I opened a can of worms...

So, I got the heater assy rebuilt and installed using MS's trick with the water hoses, which I re-routed over the top of the intake manifold. I then installed the heated air tube and modified the snorkel to clear the cowl support rod (65 convertible specific) and installed the air cleaner assy. I started the engine and let it warm up to operating temp. The heated air valve in the snorkel worked perfectly - wide open when cold and fully closed when warmed up. Also replaced the defroster hose upper flange that was broken, and repaired the broken ground wire on the windshield wiper motor. Everything now works as advertised - got lots of heat and defroster air too.

I did also discover a new issue. Passenger door latch was loose - had  one screw missing. Happened to have the correct screw -  tightened them up and door closes much better - but I do have a crack in the door frame formed across one of the top two screws.

 What is (other than welding) the standard repair for this?


68 coupe - 351W, 4R70W, 9" 3.25 -- 65 convertible - 289 4v, C4, 8" 3.00
     Thread Starter
 

3/29/2025 6:10 AM  #12


Re: So I opened a can of worms...

I purchased a repair plate for that purpose many years ago.  It is not welded in, and used the existing screws to hold it in place. It has held up for about the past 20 years.  Suggest checking with the supply houses to see if it is still available.


65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
 

3/30/2025 2:22 AM  #13


Re: So I opened a can of worms...

BobE wrote:

I purchased a repair plate for that purpose many years ago.  It is not welded in, and used the existing screws to hold it in place. It has held up for about the past 20 years.  Suggest checking with the supply houses to see if it is still available.

Thanks Bob - I will check it out.


68 coupe - 351W, 4R70W, 9" 3.25 -- 65 convertible - 289 4v, C4, 8" 3.00
     Thread Starter
 

3/30/2025 4:25 AM  #14


Re: So I opened a can of worms...


"Those telephone poles were like a picket fence"
 

3/30/2025 6:19 AM  #15


Re: So I opened a can of worms...

Yep, that looks like the one I installed. 


65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
 

3/30/2025 12:30 PM  #16


Re: So I opened a can of worms...

You know, of course, that when you open a can of worms you can go fishin' if you don't want to deal with them right away - sorta the "fish or cut bait" deal ...


Founding Member of the Perpetually Bewildered Society
 

3/30/2025 10:34 PM  #17


Re: So I opened a can of worms...

John Ha wrote:

You know, of course, that when you open a can of worms you can go fishin' if you don't want to deal with them right away - sorta the "fish or cut bait" deal ...

Funny you should say that John - I'm going out for salmon early on Wednesday morning.  Blackmouth (immature King salmon) season opens tomorrow in Puget Sound.

Last edited by Ron68 (3/30/2025 10:39 PM)


68 coupe - 351W, 4R70W, 9" 3.25 -- 65 convertible - 289 4v, C4, 8" 3.00
     Thread Starter
 

Board footera


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