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09-21-2015
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#11 |
   
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: Likely Heater Core Failure
 If hes venting/misting at the windshield and leaking in the passenger footwell. I'm 100% certain its the Heater Core. Thats what mine did before it crapped the bed
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director  91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V Last edited by GOLDCYLON; 09-21-2015 at 02:55 PM. |
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09-21-2015
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#12 |
 Join Date: Apr 2004
Location: Germantown, MD
Posts: 738
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Re: Likely Heater Core Failure
Thanks all. I'm thinking after a couple of hours of disassembly I'll be able to determine if removal of the existing Heater Core without removing the dash pad is feasible. I'm not sure I have anything to lose by giving it a try. At the same time, please let me know if you have first hand experience and don't think this is going to work!
GC, sounds like you've done this on a 1991 ZR-1. My car is a 1991 also. I'd be real interested in your thoughts on the likelihood of succeeding without removing the dash. I do understand there will be problems with a couple of mechanical connections that will be difficult to see without dash removel. For these connections, I'm planning to use a fiber optic inspection camera as a work around. Jim, I understand you're busy. I might take you up on pressure testing the system if you think it makes sense. I'm just not sure what else would result in the symptoms I'm experiencing other than the heater core. The symptoms are: - vapor and condensation on the windshield at and between AC/Heat setpoint temperatures of 60 and 90 degrees. - vapor clearly smells like antifreeze. - unmistakable antifreeze puddle in the plasitic passenger side footwell. Thanks again for any thoughts or suggestions. |
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09-21-2015
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#13 | |
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Join Date: Apr 2004
Location: Germantown, MD
Posts: 738
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Re: Likely Heater Core Failure
Quote:
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09-21-2015
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#14 | |
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Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: Likely Heater Core Failure
Quote:
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V |
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09-21-2015
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#15 |
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Join Date: Jan 2004
Location: Alex VA
Posts: 1,087
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Re: Likely Heater Core Failure
spend a few dollars and give Gordon Killabrew a call. he literally "wrote the book" and was explaining that he had a few tricks that will really help.
it's very easy to bypass in the meantime so you can isolate the core and continue to enjoy the car. the rad stench is a B though. don't pump any more of it into the car. my first Z did this at about 80k miles JUST in time for me to sell it. could've waited a few more weeks and I would have been happier it went to cali where you don't even need it!!
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95 390 LPE ZR1 (505 rwhp) LSV = Lingenfelter Super Vette Twin Turbo 2003 Z06 (800 RWHP) |
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09-23-2015
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#16 |
 Join Date: Aug 2013
Location: Holland
Posts: 80
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Re: Likely Heater Core Failure
From engine side its not possible to remove the heater-core.
I can send pictures from engine side with the module a.c. Evaporator and blower motor removed. Did you checked already if it is maybe leakeage from the heater hoses, thru the bulkhead seal material..... If there is coolant leaking from those hoses it can enter that area where the heater assembly is. Toke away the ac evap/blower module toke me three hours. I did this because of a leaking evaporator element. |
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09-23-2015
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#17 |
Join Date: Sep 2012
Location: Westminster, Md.
Posts: 436
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Re: Likely Heater Core Failure
I removed both seats in order to have more room.it was a job to put the pad back on by yourself. I would also give you a hand.
Nelson QUOTE=QB93Z;232467]Hi Scott, I am busy with rehab'ing a rental property, but if you let me know when you are going to work on it, I will try to come down to your area and help. Nelson has experience pulling the dash pad and I am sure he would be glad to help as well. I have a coolant system pressure tester that you can borrow if you want to try and verify a heater core leak. Jim 443-244-1347[/QUOTE]
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WAZOO MEMBER 1993 #124 Ruby 1994 #??? Red/Black 1995 #061 Black/Red 2012 ZR1 Preproduction |
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09-24-2015
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#18 |
 Join Date: Sep 2010
Location: Currituck, NC
Posts: 246
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Re: Likely Heater Core Failure
Here's a few photos from the 93 I changed.
     
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09-24-2015
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#19 |
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Join Date: Sep 2010
Location: Currituck, NC
Posts: 246
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Re: Likely Heater Core Failure
Two more!
 
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09-24-2015
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#20 |
 
Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,797
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Re: Likely Heater Core Failure
Great Photos......but SCARY
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