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Old 09-01-2015   #1
Vette73
 
Join Date: Nov 2014
Location: Brooklyn ny
Posts: 1,045
Default Coolant drain question..

Figured I would throw this one out there..

Sending out the plenum and injector housings for porting soon..

I heard you have to drain some of the coolant first...Did not get a chance to give it a really good look, but is there a petcock screw on the bottom of the radiator?

I'm sure there is the car is a 91.....Is it easy to access? Will it be visible when I get underneath the car? How much should I drain?

Thank you...

Last edited by Vette73; 09-01-2015 at 07:42 PM. Reason: Spelling
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Old 09-01-2015   #2
GOLDCYLON
 
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Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
Default Re: Coolant drain question..

Bottom passenger side. About a Coffee can full.
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GOLDCYLON - 91 ZR-1 #2014
GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's)

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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

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Old 09-02-2015   #3
Vette73
 
Join Date: Nov 2014
Location: Brooklyn ny
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Default Re: Coolant drain question..

Very good ....Thanks...

Last edited by Vette73; 09-02-2015 at 03:59 AM. Reason: Spelling
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Old 09-09-2015   #4
Funracer
 
Join Date: Oct 2011
Location: Shalimar, FL
Posts: 192
Default Re: Coolant drain question..

If you feel around for it then use a pair of pliers to open you dont even have to jack up the car.
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Old 09-14-2015   #5
Vette73
 
Join Date: Nov 2014
Location: Brooklyn ny
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Default Re: Coolant drain question..

Looking now....Does it look like a regular petcock screw? Reall don't see it right now....
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Old 09-14-2015   #6
KPW
 
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Location: Ypsilanti, MI
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Default Re: Coolant drain question..

Quote:
Originally Posted by Vette73 View Post
Looking now....Does it look like a regular petcock screw? Reall don't see it right now....
Yep, nothing fancy. Should be pretty visible from underneath, not too much hunting around.



This picture might help...

Last edited by KPW; 09-14-2015 at 07:12 PM. Reason: added picture
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Old 09-14-2015   #7
Vette73
 
Join Date: Nov 2014
Location: Brooklyn ny
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Default Re: Coolant drain question..

Yes yes found it.....Thanks so much....
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