1989 T-targa Top Overheating

1989MKIII · 03-07-2005, 07:38 PM

well, heres how it started. i bought a 1994 chevy caviailer for $900.00 USD, this cavie had a supercharged 3.1 ltr V6 full body kit, rims, ext. traided that for a 1994 Ford Explore XLT, then that same day traided it for my 1989 Targa Top Turbo MKIII Supra 5-Speed. best traid of my life, that same day, took it to a sponser of my car club, (the car was totaly stock befor i got it) i got turbo back Magnaflow Exaulst done. and K& N custom built cold air kit. but....i have started haveing overheating issuess :angry: , i have tryed everything. i have changed thermastats, radator caps, radator hoses, water pump, all of it. what could it be? please please please let me know. thanks

(sorry my spelling sucks)

justin

hangsupra · 03-08-2005, 12:26 AM

well....the first thing for overheating problem is to flush the radiator...first...and see how was it....so thats why u spend less $$$ for looking the cause...hope that work...let me know if it work....

1989MKIII · 03-08-2005, 01:42 AM

well i have tryed that and it didnt do anything for it. it ran a little cooler for a short peried of time. but outher then that it didnt help. but thanks to some outher threds in this forum, i think i have a lead on it. i have noticed i dont have heat, also that my HCV (heater control valve) is not opening. so i am going to bypass that and see if it helps. once i do that i am going to see. if that helps i will let yall know for anyone in the futer so that they will know. thanks for your info so quick.

justin
B)

87supraguy · 03-08-2005, 08:36 AM

i dont think your car would over heat do to the HCV my was broken for about a week and i had no problems with it over heating until after i did the bypass. when you do the bypass id sugggest going with some new heater tube clamps cause when i did mine the factory clamps didnt fit tight enough and i kept leaking colant all over till i bought new ones. for the over heating problem itself have you check if you Head gasket is blown? Thats a common problem with the supras

1989MKIII · 03-08-2005, 04:45 PM

no i havent tought about BHG, but that isnt something i wanted to hear. does anyone know where i can get a good one. and how mutch were talking about for one. i defently want meadtle caz i plain on HIGH boost and High HP. my goal for this car is a full body pump Gass 11 sec 1/4 mile 7m-gte! but anyway..thanks for your info, and let me know asap. thanks

justin

suprra_girl · 03-14-2005, 08:26 AM

check out the "my car is overheating" in the faq's... and yes a head gasket is a possibility

have you burped the cooling system yet?

if you are planning on high hp i would suggest a metal head gasket with arp head studs and get your block and head machined as close to single digit RA numbers as possible... the mhg will rely on a perfect finish

good luck

Karpediem · 03-15-2005, 09:46 PM

WellI had the same problem---believe it or not I traced it to the Rad.fan--it has a cooling off and on switch in it and when I replaced the fan the overheating stopped---hope this helps

hangsupra · 03-17-2005, 12:21 AM

oh one thing i forgot to m.ntion... you need to check your radiater to see if the antifreeze n the water were equal tho...if you have water more than the antifreeze....n little of antifreeze than that can be a problem too...to check if you have a bhg is to open your oil cap n look under the cap or the head valve cover to see if you see any lightbrown or yellingbrown color tho...if there were this color than u were in bid trouble...cause you did bhg tho...so yeah....hope this help too....

03-14-2005, 08:26 AM	#6
suprra_girl 7M POWAH! ;) Join Date: Jun 2004 Location: New Zealand Posts: 2,312	check out the "my car is overheating" in the faq's... and yes a head gasket is a possibility have you burped the cooling system yet? if you are planning on high hp i would suggest a metal head gasket with arp head studs and get your block and head machined as close to single digit RA numbers as possible... the mhg will rely on a perfect finish good luck __________________ Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first!

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03-07-2005, 07:38 PM	#1
1989MKIII Stock Join Date: Mar 2005 Location: Missouri USA Posts: 5	well, heres how it started. i bought a 1994 chevy caviailer for $900.00 USD, this cavie had a supercharged 3.1 ltr V6 full body kit, rims, ext. traided that for a 1994 Ford Explore XLT, then that same day traided it for my 1989 Targa Top Turbo MKIII Supra 5-Speed. best traid of my life, that same day, took it to a sponser of my car club, (the car was totaly stock befor i got it) i got turbo back Magnaflow Exaulst done. and K& N custom built cold air kit. but....i have started haveing overheating issuess :angry: , i have tryed everything. i have changed thermastats, radator caps, radator hoses, water pump, all of it. what could it be? please please please let me know. thanks (sorry my spelling sucks) justin

03-08-2005, 12:26 AM	#2
hangsupra 12psi boost Join Date: Jan 2005 Location: 209 area in cali. Posts: 397	well....the first thing for overheating problem is to flush the radiator...first...and see how was it....so thats why u spend less $$$ for looking the cause...hope that work...let me know if it work....

03-08-2005, 01:42 AM	#3
1989MKIII Stock Join Date: Mar 2005 Location: Missouri USA Posts: 5	well i have tryed that and it didnt do anything for it. it ran a little cooler for a short peried of time. but outher then that it didnt help. but thanks to some outher threds in this forum, i think i have a lead on it. i have noticed i dont have heat, also that my HCV (heater control valve) is not opening. so i am going to bypass that and see if it helps. once i do that i am going to see. if that helps i will let yall know for anyone in the futer so that they will know. thanks for your info so quick. justin B)

03-08-2005, 08:36 AM	#4
87supraguy 3" Exhaust Join Date: Feb 2005 Posts: 55	i dont think your car would over heat do to the HCV my was broken for about a week and i had no problems with it over heating until after i did the bypass. when you do the bypass id sugggest going with some new heater tube clamps cause when i did mine the factory clamps didnt fit tight enough and i kept leaking colant all over till i bought new ones. for the over heating problem itself have you check if you Head gasket is blown? Thats a common problem with the supras

03-08-2005, 04:45 PM	#5
1989MKIII Stock Join Date: Mar 2005 Location: Missouri USA Posts: 5	no i havent tought about BHG, but that isnt something i wanted to hear. does anyone know where i can get a good one. and how mutch were talking about for one. i defently want meadtle caz i plain on HIGH boost and High HP. my goal for this car is a full body pump Gass 11 sec 1/4 mile 7m-gte! but anyway..thanks for your info, and let me know asap. thanks justin

03-15-2005, 09:46 PM	#7
Karpediem Stock Join Date: Mar 2005 Posts: 2	WellI had the same problem---believe it or not I traced it to the Rad.fan--it has a cooling off and on switch in it and when I replaced the fan the overheating stopped---hope this helps

03-17-2005, 12:21 AM	#8
hangsupra 12psi boost Join Date: Jan 2005 Location: 209 area in cali. Posts: 397	oh one thing i forgot to m.ntion... you need to check your radiater to see if the antifreeze n the water were equal tho...if you have water more than the antifreeze....n little of antifreeze than that can be a problem too...to check if you have a bhg is to open your oil cap n look under the cap or the head valve cover to see if you see any lightbrown or yellingbrown color tho...if there were this color than u were in bid trouble...cause you did bhg tho...so yeah....hope this help too....