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Old 03-30-2010, 05:11 AM  
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Default stock 1.3L running hot

ok, so my sierra is running hot. kinda just started out of nowhere. ive checked the front of the radiator, its not blocked up at all, air flow isnt restricted. pulled out the thermostat, cleaned it out and put it back in (also discovered the gasket had completely disintegrated ) and changed the coolant twice.

tomorrow im going to try pulling out the radiator and flushing it inside and out thoroughly, but anyone have any other solutions? i have read somewhere that you can just drill a hole in the thermostat to help water flow, and since we dont really get too cold here, would this work for me, or is this more of a band aid solution?
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Old 03-30-2010, 05:19 AM  
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ive also checked in the radiator while the engine is running while cold, and i can see it is flowing...
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Old 03-30-2010, 07:12 AM  
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i have been battling this for months. i have changed everything possible was fixing to do a head job.i drilled a 1/8 hole in the flange and it fixed it i also put a 195 degree t/stat in it.the mech said they can get an air pocket around the stat. hope this helps
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Old 03-30-2010, 10:36 PM  
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This is cool, been reading on here for a while, but this is my first post. Anyway, to my understanding, and this is happening to mine as of today, if you check the oil, and it looks milky, then its probably the head gasket. Another sign of this is if you have noticed what looks like steam coming off the exaust, and lower coolant levels. Kind of like the coolant has been disapearing. This is where I am at anyway.

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Old 03-30-2010, 11:41 PM  
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theres no coolant in the oil and no oil in the coolant. im about 99% sure thats not the problem... i check fluid levels about once a week, and i havent seen any changes.
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Old 04-08-2010, 05:24 PM  
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Quote:
Originally Posted by whincup View Post
ok, so my sierra is running hot. kinda just started out of nowhere. ive checked the front of the radiator, its not blocked up at all, air flow isnt restricted. pulled out the thermostat, cleaned it out and put it back in (also discovered the gasket had completely disintegrated ) and changed the coolant twice.

tomorrow im going to try pulling out the radiator and flushing it inside and out thoroughly, but anyone have any other solutions? i have read somewhere that you can just drill a hole in the thermostat to help water flow, and since we dont really get too cold here, would this work for me, or is this more of a band aid solution?
New to forum...this is great. I am a new sami owner, I have had an 87 for about two months. Working through the whole thing. Had the same prob.. replaced everthing.. and it still showed hot on the temp guage. It never acted hot though. Make me very unsure while driving. One day I was driving along and it was not showing hot untill i turned on the headlights ???? I thought this is electrical. I replace the temp sending unit and it was fixed. I got the unit off of EBAY for about $19.00. Hope this helps..
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Old 04-08-2010, 11:45 PM  
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for me it only runs hot when foot flat in 5th gear, drop back to fourth it cools down a little bit...

but yea, i was thinking about replacing the temp sender unit, or installing an aftermarket temp gauge. going back a few months i had it so hot i ended up turning it off to hear it bubbling!... mind you, that was doing about 10km/h revving hard through soft sand on a 40 degree (celsius) day (over 100 fahrenheit).

is the temp sender unit hard to change? mite go have a look at acks...
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Old 04-11-2010, 04:42 PM  
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10 min max. nothing to it. Its just below the thermostat. on a 87 sami,with ablade electrical adapter connected.

Go get it and rule out one more poss.
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Old 04-11-2010, 05:02 PM  
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Also don't rule out timing set to high and could be leaning out at high rpm. Both will cause it to run hot.
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