Photobucket
Members Login
Post Info TOPIC: Overheating


Member

Status: Offline
Posts: 6
Date:
Overheating


Hi all,

My 389 seems to get hot at idle after cruising for awhile, sat in a Tim Hortons lineup today for 15-20 min and my aftermarket gauge went up to 240.  It reads right by the thermostat so I knew it would be a bit hot but 240 seemed a little much.  Hot light on dash never came on til I tried to start it again after letting it sit for 20 min off and it had trouble firing, usually starts right up?  Gave it more time it it was back to normal.  I put in a new 195 thermostat and still same problem.  No problem when cruisin tho engine stays at 195-200.  Anyone got any ideas?  Thanks



__________________


Addicted!

Status: Offline
Posts: 135
Date:

I run a 180 stat in my small block and it doesn't ever go over 180. Big blocks run hotter so I would run a 180 or even a 165 stat to try and keep it cool. A 195 would be a winter stat to try and get it to warm up but I'm assuming you don't drive it in the winter.
A good fan and a shroud will help as well.

__________________

72 Nova SS,   66 Beaumont Sport Deluxe,   09 Pontiac Solstice GXP Coupe



Guru

Status: Offline
Posts: 832
Date:

Not familiar with 389's but for SBC's and 409's like Mike said, the right fan and shroud help and the 180 thermostat would be better.

Use 50/50 anti freeze and distilled water; fan blades should be half in half out of the shroud; you can "overdrive" your pulley to make the fan blades faster at idle; Changing timing can help too (don't ask me which way, just google that and you'll see what the options are). Some people use a product called water wetter or something like that.

How old and clean is your rad?
240 is right up there, I'd normally say check it with an IR gun to see if your gauge is correct, but if it wouldn't start, it sounds like it was hot.

__________________

63 Pariesienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC.

Mahone Bay, NS Still not old enough to need an automatic



Member

Status: Offline
Posts: 6
Date:

Awesome thanks, I'll give it a try.



__________________


Poncho Master!

Status: Offline
Posts: 1356
Date:

incorrect shrouding pf the fanblade can be a real problem. As can a dirty radiator....



__________________

cutting a roof off a four door is NOT a convertible.....

65 Parisienne convertible project.

Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.

Tweet this page Post to Digg Post to Del.icio.us
.
.
.
.