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Heater core replacement advise wanted #877053 03/24/08 07:10 PM
Joined: Dec 2002
Posts: 356
S
Spacetrucking Offline OP
Mudrunner
Hi, did a search but came up blank.
Looks like I'll need to replace my heater core soon,
slight leak on driver floor
( carpet is out, I can see the leak from the back of the heater box onto my floor board )
Anyone done it and what's involved?
Thanks much,
Hugh


'86 SR-5 Extra-cab 4 x 4, 2" BL, 33 x 12.5 x 15R M/T on 15 x 8 rockcrawlers ( 3 3/4" BS ), 22RE 5 sp , 4.88's Detroit True-Trac front, V6 open rear, 24 mm Sway-Away + Rancho 5000's, removed sway bar, no-rust south US bed, Ramsey 8000 winch
From the Off-Road World
Re: Heater core replacement advise wanted [Re: Spacetrucking] #877054 03/24/08 11:40 PM
Joined: Dec 2004
Posts: 143
E
eastcoast Offline
Wheeler
If ya got A/C its gonna be a pain, at least in my truck it is, to get to the heater core, you have to pull out the cooling unit as well, which means discharge, evac and recharge...nothing more than a trip and some added cost with 134a, but if you have R-12 its prolly gonna suck. i had a hell of a time finding someone to just take what little R-12 was left when i converted to 134a due to a leak, and since you're opening the system, you'll need o-rings and a new accumulator at least, i believe the ones they sell now will work with the old r-12...finding oil for the r12 system i dunno, hopefully your system is in good shape and the shop can just throw the old back in. Other than that its pretty straightforward, get a haynes manual and you should be good. remember to bleed the air from the system when yer done, also recommend flushing and replacing antifreeze and any old hoses while you have it apart with summer around the corner. Good luck!

Last edited by eastcoast; 03/24/08 11:42 PM.
Re: Heater core replacement advise wanted [Re: eastcoast] #877055 03/25/08 11:43 PM
Joined: Jun 2005
Posts: 52
B
BROWNBAGG Offline
Getting the Wheeling Fever
you dont have to mess with the a/c but its a beech, suck it up. its behind the radio.

Re: Heater core replacement advise wanted [Re: Spacetrucking] #877056 03/26/08 12:24 AM
Joined: Dec 2000
Posts: 882
M
missouriman Offline
Rock Warrior
make sure that it is not a leaking hose that is running down inside!!!

Re: Heater core replacement advise wanted [Re: missouriman] #877057 03/26/08 01:55 PM
Joined: Dec 2002
Posts: 356
S
Spacetrucking Offline OP
Mudrunner
Thanks guys, good thing it's nearly spring!
Yes, a loose hose would be great, but I doubt it.
The clamps are on the engine side of the firewall, but I
will look into it.
Yes it has A/C <img src="/forums/images/graemlins/rolleyes.gif" alt="" />
Hugh


'86 SR-5 Extra-cab 4 x 4, 2" BL, 33 x 12.5 x 15R M/T on 15 x 8 rockcrawlers ( 3 3/4" BS ), 22RE 5 sp , 4.88's Detroit True-Trac front, V6 open rear, 24 mm Sway-Away + Rancho 5000's, removed sway bar, no-rust south US bed, Ramsey 8000 winch
Re: Heater core replacement advise wanted [Re: Spacetrucking] #877058 03/26/08 04:49 PM
Joined: Dec 2006
Posts: 103
K
KiwiCowboy Offline
Wheeler
I pulled the entire dash out and that made it a lot easier. The extra time it took to do it was worth it to not have to fight and cuss trying to get the core out.

<img src="/forums/images/graemlins/kewl.gif" alt="" />

Re: Heater core replacement advise wanted [Re: KiwiCowboy] #877059 03/26/08 06:03 PM
Joined: Apr 2004
Posts: 2,010
87Toy4x4 Offline
Body Damage is Cool
Quote
I pulled the entire dash out and that made it a lot easier. The extra time it took to do it was worth it to not have to fight and cuss trying to get the core out.

<img src="/forums/images/graemlins/kewl.gif" alt="" />


isn't this the only way to do it? thats how i did mine. not too bad, just time consuming. gear wrenches are your friend, especially the flex head ones.


87 22R PU, 2 body lift, 33 BFG muds, 4.88's, F&R Lock-Rights, Rancho Shocks, EB's Street RV Head w/ 268 Cam, LCE Header, 2" to 2 1/4" exhaust, Flowmaster 50 series, Magnaflow high flow cat, complete Herculined SR5 interior, V6 BB, MC, and calipers.

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