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#1 |
Registered User
Join Date: May 2007
Location: Dayton
Posts: 75
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Heater Core replacement
Ok fellas it looks like I'm going to drive my Siverado when it gets cold, so I'm going to replace the heater core...
I have a few questions... I've replaced one in my mini truck Will I have to remove the Dash? Will I need to remove the air conditiner box in the engine compartment Do I need to remove the fender? let me know guys... thanks |
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#2 |
What Hump?
Join Date: Apr 2003
Location: New River AZ
Posts: 2,009
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Re: Heater Core replacement
No
yes no
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Lil red 86 c-10 99 Sub 78 Camper Special w/ 454 |
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#3 |
Registered User
Join Date: May 2007
Location: Dayton
Posts: 75
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Re: Heater Core replacement
how many hours???
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#4 |
What Hump?
Join Date: Apr 2003
Location: New River AZ
Posts: 2,009
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Re: Heater Core replacement
Depends on what your going to do with the freon, are you going to recharge, then you'll need to evacuate the system. But the overall replacement of the heater core, perhaps 2-3 hours depending on your skill level, mine being zero.
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Lil red 86 c-10 99 Sub 78 Camper Special w/ 454 |
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#5 |
Registered User
Join Date: May 2007
Location: Dayton
Posts: 75
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Re: Heater Core replacement
Ok eyegore my unit air conditioner unit is disconnected...so just remove that and I should be able to get to the core??? it took me like 6hrs to do the one in my isuzu... I had to remove the dash take apart the heater box just a cluster F@#k
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#6 |
Registered User
Join Date: Feb 2003
Location: Midwest City, OK
Posts: 1,001
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Re: Heater Core replacement
Don't forget to disconnect your heater hoses, and put an old towel down before you remove it.
http://www.coloradok5.com/heatercore.shtml
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Robert Current: 1986 SWB Silverado 4.3 / TH400 Past: 1985 SWB Silverado 305 / TH350 - sold 1995 1987 1/2 ton Silverado - FI 350 / 700R4 sold 2007 |
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#7 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Heater Core replacement
In most cases the replacement of the heater core on a truck like yours---don't know your exact year, but in an 81 to 87---the heater housing inside the truck and the glovebox need to come out. The outside A/C housing does NOT need to be moved what so ever. You will need to go to the outside and take some nuts off of the bolts that stick through the firewall and you will have to take some screws out of the inside of the cab (all of which hold the housing in place). Once done, disconnect the heater hoses in the engine compartment, disconnect the heater controls and the vacuum hose (Mark everything). Then with the glovebox gone, roll out the heater housing and that will let you get to the heater core holding straps. Take the core out and put in a new one. Now re-install in a reverse fashion.
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#8 | |
What Hump?
Join Date: Apr 2003
Location: New River AZ
Posts: 2,009
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Re: Heater Core replacement
Quote:
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Lil red 86 c-10 99 Sub 78 Camper Special w/ 454 |
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#9 | |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Heater Core replacement
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#10 | |
Registered User
Join Date: May 2007
Location: Dayton
Posts: 75
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Re: Heater Core replacement
Quote:
I've read something like that shortly after I noticed my heat core went bad... I wasn't planning on driving it in the cold so I just by passed the core now I will be... I'm thinking about 3 hrs for me then... |
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#11 |
Registered User
Join Date: May 2007
Location: Dayton
Posts: 75
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Re: Heater Core replacement
Oh yeah its a 86
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#12 |
Registered User
Join Date: Dec 2005
Location: Dallas, TX
Posts: 241
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Re: Heater Core replacement
I just did my 84 2 weeks ago and it took right at 2 hours. It was all done like piecesparts said. There were I think 3 or 4 bolts by the a/c box in the engin compartment and the rest was all under the dash. Take your time and you will be supprised how easy it is!
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1984 Chevy Stepside, 4spd granny, 4 1/2 front/6 inch rear drop. |
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#13 |
350+dual flows= fun :)
Join Date: Oct 2005
Location: TORRANCE ,CA.
Posts: 120
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Re: Heater Core replacement
6 hours...
lol... j/k.. i pulled mine out, re-saudered the broken tube, and put it back in, took about an hour.
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ALWAYS CHECK YOURE FRONT WHEEL BEARINGS!! SPINNING OUT ON THE FREEWAY DUE TO THE BEARING GOING OUT IS PRETTY HAIRY!!! |
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#14 | |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Heater Core replacement
Quote:
The 6 hour thing is the redneck way---remove a bolt, Drink beer, remove a heater hose, Drink more beer, remove the housing, drink a lot of beer, remove the core, Forgot where the beer is--went to buy more--couldn't find the store---GAVE UP.... Last edited by piecesparts; 09-12-2007 at 11:19 PM. |
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#15 |
67 Chevy Stepside
Join Date: Mar 2007
Location: Jonesville NC
Posts: 836
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Re: Heater Core replacement
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1967 Chevy stepside 1976 BIG DOOLEY 454 turbo 400 4:11 |
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#16 |
Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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Re: Heater Core replacement
I would plan for 6 hours if i was doing it. That's a doofus factor of 3...
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#17 |
glamoros piece o' lowlife
Join Date: Mar 2007
Location: Redford, MI
Posts: 1,164
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Re: Heater Core replacement
Here's a tip - after installing the new core, when you hook up the supply hose from the engine's intake slip some kind of flow restrictor in it just before the core - it will reduce the pressure so when you revv the engine up you won't be trying to balloon the core. Did that to my car, no core blown yet, and I do go WOT every so often and them cores are know to blow easily. Did it to the truck too after blowing core while engine break-in, never had any problems ever. For a restrictor I used like three 7/16 washers stacked on top of each other, but you can use some kind of brass bushing or something else suitable that you find rolling around in yer garage.
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The more I drink, the more I drink, the more I drink... diesel, reg cab, long bed, 4 across the rear, single stack, wooden stakes, and lotsa lights - the Hay Express |
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#18 |
Registered User
Join Date: May 2007
Location: Dayton
Posts: 75
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Re: Heater Core replacement
Right on... I will do it sometime this weekend.. I will probably will change all the hoses and thermostat too...
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#19 |
glamoros piece o' lowlife
Join Date: Mar 2007
Location: Redford, MI
Posts: 1,164
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Re: Heater Core replacement
Yes, that's always a good idea. Actually I have to change thermostat too, I run 160F now cause I got a small radiator and no shroud, but now that it's getting colder I think I'm gonna go up to 193F and throw a shroud in there.
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The more I drink, the more I drink, the more I drink... diesel, reg cab, long bed, 4 across the rear, single stack, wooden stakes, and lotsa lights - the Hay Express |
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#20 | |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Heater Core replacement
Quote:
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#21 |
glamoros piece o' lowlife
Join Date: Mar 2007
Location: Redford, MI
Posts: 1,164
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Re: Heater Core replacement
Just ask some of yer local Mustang guys, or anyone else who got a 302 that don't spend its live under 2000 rpms - maybe it's the pumps Ford put in those things, but they are known to blow heater cores during high revv, to the point where Ford actually put a restrictor in there. And oddly enough installing a restrictor doesn't reduce heater core output, but just the opposite - I know it don't really make a whole lot of sense, but that's what I observed in both the car and the truck. Now, blowing the core in my truck may be contributed to it being old, and our truck cores may be generally much tougher than the Ford ones, but it never hurts giving the restrictor a shot.
__________________
The more I drink, the more I drink, the more I drink... diesel, reg cab, long bed, 4 across the rear, single stack, wooden stakes, and lotsa lights - the Hay Express |
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#22 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Heater Core replacement
The idea of a restrictor in a line with hot water in it is a good idea for slowing down the flow to get more heat transfer for each drop of water. The average exchange for a heat exchanger without a restriction that is around 16 degrees across the pipe wall. The restrictor on the inlet side is good for removing surges in the system, and slowing the water down will give more exchange, but it will have limitations.
Ford is not stupid---they just don't how to spell GM. Last edited by piecesparts; 09-14-2007 at 08:14 PM. |
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#23 |
glamoros piece o' lowlife
Join Date: Mar 2007
Location: Redford, MI
Posts: 1,164
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Re: Heater Core replacement
Figured it's something like that, slow water means more time for the water to spend in the core, and more time in the core means more time to dissipate heat, right?
__________________
The more I drink, the more I drink, the more I drink... diesel, reg cab, long bed, 4 across the rear, single stack, wooden stakes, and lotsa lights - the Hay Express |
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#24 |
Registered User
Join Date: May 2007
Location: Dayton
Posts: 75
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Re: Heater Core replacement
well bros thanks alot it was a bit more difficult...probably because of the make...and year... I had to take the damn heater box out and I had to take the screws out of the air conditioner in the front some of the screws was a biotch but i got them... I dropped the inner fender well and that made it easier... I was hoping it was simple like some of you guys said... I put new heater hoses on and I put a new starter on too...damn thing was going out so I did that too... heat is working fine... didn't tighten one of my hose like a dumb ass but its all good now... this site is awesome thanks!!!
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#25 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Heater Core replacement
Holy Cow---after all that and you still like us?
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