Bad Heater Core ..? Blows cold on freeway - Pirate4x4.Com : 4x4 and Off-Road Forum

93liftedxlt · 02-13-2006, 09:52 AM

I have a 86 Tin top, runs and drives good, Just a couple of problom's,

My heater doesnt work

Does anyone know were the valve on the firewall is located ?

and or how to clean out a heater core ? and the location of the heater core?

im new to the world of sammi's

thanks

Tusker · 02-13-2006, 10:17 AM

The heater valve is located on the upper firewal on the passenger side. The heater cores are prone to getting a bunch of junk in them. Search and you will find some pretty good how-to writeups on cleaning them out.

UZI 9mm · 02-13-2006, 10:20 AM

This thread is well worth reading

http://www.pirate4x4.com/forum/showt...ht=heater+core

93liftedxlt · 02-13-2006, 11:26 AM

thanks, i really appreciate your help

Rudezuk · 02-13-2006, 12:39 PM

Also check your thermostat...

If you have a bad one or one that sticks open, it wont keep the engine at normal operating temp. I found that out when I took my old zuk on a snow run, and i froze my ass off!

93liftedxlt · 02-13-2006, 01:03 PM

Yeah im 100 % its the thermastat, the heater blows just fine, blow really good actually, just blows really cold,

im thinking its stuck open, cause the operating temp is right in the middle of the gauge,

Gonna pick up one after work, maybe flush the RAD fluids

Hvy_Chevy · 02-13-2006, 03:12 PM

heat also only comes out the defrost and the foot area - not out the dash.

UZI 9mm · 02-13-2006, 04:06 PM

Quote:

Originally Posted by Hvy_Chevy

heat also only comes out the defrost and the foot area - not out the dash.

That depends

It's only *supposed* to come out of the side window defrosters and the top windshield defrosters (aside from the foot vents)

But what can happen is the plastic tubing that goes behind the instrument cluster can split and/or come unattached, and send hot air all throughout behind the dash, escaping out through spaces around the front fresh/cool air vents.

This fakes out a lot of sammy owners into thinking the measly amount of warm air coming through their vents (the wrong ones, or the defrosters where it's supposed to be going)) is the heater's fault, when it isn't, really...

jones · 02-14-2006, 05:48 PM

I'd like to report that I still haven't had to clean my heater since I put that screen in there in the thread Uzi posted. It blows lots of hot air still. Do it while you have it out.

cajunsuzukispider · 02-15-2006, 10:16 AM

come on now, how can you not know where the heater core is? just follow the hot air! then you just follow the coolant hoses from the firewall to find the heater valve.

By the way, be very careful when taking the hoses off of the heater valve. it's a very thin wall hose nipple and can easily be crushed when removing a hose. if it's stuck on there, cut it lengthwise carefully and peel it off. If you bust it, just bypass it for constant heat on or off.

offroad ricer · 02-15-2006, 04:48 PM

If your temp gauge is reading in the middle the thermostat is working. The problem is in the heater box. It is full of debree. It's the same problem that all Samurais have in time.

93liftedxlt · 02-15-2006, 09:19 PM

yeah i cleaned out the heater box, and the heater valve was stuck to the cold setting, Heater works great now:

02-13-2006, 09:52 AM	#1 (permalink)
93liftedxlt Registered User Join Date: Jan 2006 Member # 65077 Location: East bay,CA Posts: 103	Bad Heater Core ..? Blows cold on freeway I have a 86 Tin top, runs and drives good, Just a couple of problom's, My heater doesnt work Does anyone know were the valve on the firewall is located ? and or how to clean out a heater core ? and the location of the heater core? im new to the world of sammi's thanks

02-13-2006, 10:17 AM	#2 (permalink)
Tusker Registered User Join Date: Jan 2001 Member # 2752 Location: Fairfield, CA Posts: 2,043	The heater valve is located on the upper firewal on the passenger side. The heater cores are prone to getting a bunch of junk in them. Search and you will find some pretty good how-to writeups on cleaning them out. __________________ 86 Samurai w/gun rack, 92" WB, VW 1.9 TD, Toyota 5-speed and dual cases with 4.7 gearset, Toyota axles with Longfields, 5.29's, ARB's f&r, YJ's, 35's, FJ-60 power steering, high steer, ............. <>< <>< <>< Hey, if this rig is for wheelin', what are all these animal parts doin' in here?

02-13-2006, 12:39 PM	#5 (permalink)
Rudezuk Registered User Join Date: May 2001 Member # 4500 Location: Soon to be VA Posts: 6,454	Also check your thermostat... If you have a bad one or one that sticks open, it wont keep the engine at normal operating temp. I found that out when I took my old zuk on a snow run, and i froze my ass off! __________________ Shane [COLOR="DarkRed"][FONT="Comic Sans MS"][URL="www.hbrk4x4.com"]HBRK4x4.com[/URL][/FONT][/COLOR] [URL="http://www.yyracing.com/"]Y&Y Racing, LLC[/URL] [URL="http://www.we-rock.cc/team_list.php?wts=show&wvalue=181"]We-Rock #208[/URL] "Team HBRK" thanks our sponsors. Driver: Shane Yost Spotter: Todd Young

02-13-2006, 03:12 PM	#7 (permalink)
Hvy_Chevy Zeus of the Sluice Join Date: Oct 2002 Member # 14094 Location: Maine Posts: 4,461	heat also only comes out the defrost and the foot area - not out the dash. __________________ Size does matter. Leave the Zukes to those who really understand.

02-14-2006, 05:48 PM	#9 (permalink)
jones Registered User Join Date: Dec 2001 Member # 8687 Location: Vancouver Island B.C. Posts: 1,083	I'd like to report that I still haven't had to clean my heater since I put that screen in there in the thread Uzi posted. It blows lots of hot air still. Do it while you have it out. __________________ The word "jones" is a slang term meaning to crave, want, or desire; or, to feel withdrawal from an activity of passion. The general slang meaning is often associated with addictive substance habits but can be applied on a more universal scale.

02-13-2006, 10:20 AM	#3 (permalink)
UZI 9mm Registered User Join Date: Jul 2001 Member # 5832 Posts: 3,833	This thread is well worth reading http://www.pirate4x4.com/forum/showt...ht=heater+core

02-13-2006, 11:26 AM	#4 (permalink)
93liftedxlt Registered User Join Date: Jan 2006 Member # 65077 Location: East bay,CA Posts: 103	thanks, i really appreciate your help

02-13-2006, 01:03 PM	#6 (permalink)
93liftedxlt Registered User Join Date: Jan 2006 Member # 65077 Location: East bay,CA Posts: 103	Yeah im 100 % its the thermastat, the heater blows just fine, blow really good actually, just blows really cold, im thinking its stuck open, cause the operating temp is right in the middle of the gauge, Gonna pick up one after work, maybe flush the RAD fluids

02-15-2006, 10:16 AM	#10 (permalink)
cajunsuzukispider Registered User Join Date: Jun 2005 Member # 48911 Location: acworth, ga Posts: 1,923	come on now, how can you not know where the heater core is? just follow the hot air! then you just follow the coolant hoses from the firewall to find the heater valve. By the way, be very careful when taking the hoses off of the heater valve. it's a very thin wall hose nipple and can easily be crushed when removing a hose. if it's stuck on there, cut it lengthwise carefully and peel it off. If you bust it, just bypass it for constant heat on or off.

02-15-2006, 04:48 PM	#11 (permalink)
offroad ricer Registered User Join Date: Jan 2006 Member # 65839 Location: LEBANON TN. Posts: 41	bad heater core If your temp gauge is reading in the middle the thermostat is working. The problem is in the heater box. It is full of debree. It's the same problem that all Samurais have in time.

02-15-2006, 09:19 PM	#12 (permalink)
93liftedxlt Registered User Join Date: Jan 2006 Member # 65077 Location: East bay,CA Posts: 103	yeah i cleaned out the heater box, and the heater valve was stuck to the cold setting, Heater works great now: Last edited by 93liftedxlt; 02-15-2006 at 09:51 PM.

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