Over heating - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members

General Miata Chat A place to talk about anything Miata

LinkBack Thread Tools
Old 07-17-2010, 12:27 AM   #1
Thread Starter
Join Date: Nov 2009
Location: Tucson, AZ
Posts: 23
Total Cats: 0
Default Over heating

Got a 91 miata with a 1.8 swap and a custom fabbed turbo kit with aem ems.

Problem is, it keeps over heating, I can drive it bout 10 minutes and it starts creeping past the half line mark. The weird part is that it gets hot, cools down, gets hot, cools down. I figured it was the radiator cap not holding pressure so i replaced that with a 1.4(20lb) but its still doing it. Thoughts?
svtkate is offline   Reply With Quote
Old 07-17-2010, 01:09 AM   #2
Tour de Franzia
iTrader: (6)
hustler's Avatar
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351

There are a million threads on this **** from this week alone. Search.

No one here will answer your questions until you search. If they do, I will ban them.
hustler is offline   Reply With Quote
Old 07-17-2010, 03:59 AM   #3
Elite Member
iTrader: (6)
Join Date: Nov 2007
Location: Southlake,Texas
Posts: 3,251
Total Cats: 17

How wet is your water? I once had this same exact problem and I tested my water, and it wasn't wet enough. I was 12% below my desired wetness. I replaced the water with wetter water and now I'm wet.
Bond is offline   Reply With Quote
Old 07-17-2010, 04:34 AM   #4
Senior Member
iTrader: (1)
Join Date: Jul 2009
Location: Batavia, IL
Posts: 604
Total Cats: 0

Does it get hot when you are stopped and then cool down when you start driving? It could be your fan isn't turning on. To rule out the fan, jump testfan and gnd in the diagnostics box to turn the fan on and then go drive around for awhile. This happened to me - it turned out to be a faulty thermistor.
Cococarbine3 is offline   Reply With Quote
Old 07-17-2010, 05:09 AM   #5
Elite Member
iTrader: (12)
Join Date: Apr 2008
Location: Springfield IL
Posts: 2,750
Total Cats: 24

You stand a chance of blowing a hose, heater core, or radiator with the added 7psi of the new cap. That is all I will say due to fear of being banned. Happy searching
chpmnsws6 is offline   Reply With Quote
Old 07-17-2010, 06:26 AM   #6
Cpt. Slow
iTrader: (25)
curly's Avatar
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,105
Total Cats: 518

Ban, ban, and ban.
I'd run with the waste gate disconnected until you figure this out, it might help by eliminating a lot of the turbo heat. Replace the thermostat too, it's another "might as well" part like the radiator cap.
curly is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Transmission Heat Shield Thread patsmx5 General Miata Chat 46 06-06-2016 11:27 AM
Heat Transfer Question patsmx5 General Miata Chat 74 10-15-2015 12:18 AM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -4. The time now is 03:18 PM.