time for 180* - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-23-2006, 11:09 AM   #31
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Westerville, Ohio 2000 Black SSEi
Posts: 6,127
Thanks: 0
Thanked 0 Times in 0 Posts
Rogue is on a distinguished road
Default

Quote:
Originally Posted by Bob Dillon
Quote:
Originally Posted by Rogue
This isnt to say that the system will always be at that temp. During Hi speed WOT runs such as the 1/4 mile my system with a 160 will heat up to 180 during the run but then cool down as soon as I get out of the throttle. But during cruise or in town driving my temps are always at 160ish.
Rogue, the coolant temp must fluctuate, because if your coolant temp remained at 160 around town with a 180 thermostat, it would mean that no coolant was flowing through the radiator, right, as a 180 thermostat is closed at coolant temps of 160?
I run a 160 T-stat. Under hard driving conditions my coolant temps will rise to the points the fans turn on (165 for low and 175 for high) to cool it back down.
Rogue is offline   Reply With Quote
Old 05-23-2006, 11:16 AM   #32
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Westerville, Ohio 2000 Black SSEi
Posts: 6,127
Thanks: 0
Thanked 0 Times in 0 Posts
Rogue is on a distinguished road
Default

Quote:
Originally Posted by Bob Dillon

Would it be fair to say them, as your coolant temp is always below boiling, that the system never pressurizes, i.e., exceeds the boiling point of coolant (i.e., around 212?)
The boiling point of dex-cool in a 50% solution is 265F. I doubt any system requires the coolant to boil to pressurize..

Quote:
Originally Posted by Bob Dillon
It is important to point out, as well, that the thermostat itself is a partial restriction to coolant flow. The traditional Pontiac V-8, for example, will promptly overheat without a thermostat in place, because transit time of the coolant through the radiator is reduced greatly. We remove the thermostat for the drag strip, but also have a restrictor plate in place of the thermostat to slow transit time.
Good information, I have run without a T-stat before and not noticed an overheat problem but I will keep the restricter plate in mind.
Rogue is offline   Reply With Quote
Old 05-23-2006, 11:28 AM   #33
Senior Member
Posts like a Camaro
 
Join Date: Feb 2005
Location: Gilroy, California
Posts: 922
Thanks: 0
Thanked 0 Times in 0 Posts
Bob Dillon is on a distinguished road
Default

Quote:
Good information, I have run without a T-stat before and not noticed an overheat problem but I will keep the restricter plate in mind.
Yeah, they're pretty high-tech-you knock out the middle of the thermostat and put it in.

Or, of course, you can buy one from Summit for $20.


It may not be a 3800 problem. The traditional Pontiac V-8 is known to be cranky about cooling. The modern version of the Ford flathead.
Bob Dillon is offline   Reply With Quote
Old 05-23-2006, 12:16 PM   #34
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

Quote:
Originally Posted by Bob Dillon
Quote:
Good information, I have run without a T-stat before and not noticed an overheat problem but I will keep the restricter plate in mind.
Yeah, they're pretty high-tech-you knock out the middle of the thermostat and put it in.

Or, of course, you can buy one from Summit for $20.


It may not be a 3800 problem. The traditional Pontiac V-8 is known to be cranky about cooling. The modern version of the Ford flathead.
Ok now I understand what you are getting at... and if memory serves I have seen a few chevy V8'* that were cranky in the very same manner...

I do wonder if the Buick V6'* had more cooling capability then they really needed... when I bought my 91 Bonneville the Thermostat was stuck open... I could not get the car to heat up past 140F...

I almost want to think that the Caddy 4.1 & 4.5 used the same radiator with the exception of the Oil cooler... I may have to check that out as well...

And a long time ago My father had an 85 Trans Am, I swear it was way too easy to overheat that car..

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 05-25-2006, 12:09 AM   #35
Member
Posts like a V-Tak
 
Join Date: Apr 2006
Location: Indy
Posts: 31
Thanks: 0
Thanked 0 Times in 0 Posts
psyops is on a distinguished road
Default

given that the only difference in the stats is the temp rating, then the only difference would be the temp at which it opens. You will get quicker circulation with a 180 stat. Now if the diameter of the stat opening were to be changed it would alter the rate of circulation as if it were a metering device. In slowing down the flow, the coolant would remain in the radiator longer, as well as in the block longer. As long as the rediator can disperse heat quicker than the engine, the system would run cooler. That is the same reason race cars use restrictors instead of stats. It can meter the flow rate while eliminating the possible mechanical failure possibility.Nothing like puking a megabuck engine over a $5 part.
psyops is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
180 t-stat/180 Fan Turn On - Running 195-205*? TommyGloves 2000-2005 9 05-08-2006 06:37 PM
Vat time is it? Time to un-pimp ze auto! Ryan Lounge 13 02-27-2006 09:10 PM
first time poster Blown engine in my '95 (2nd time) farmboy 1992-1999 12 10-03-2005 03:20 PM
1st time owner, long time fan Rich J. Introductions for new members 8 04-03-2005 08:39 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 02:39 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.