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'99 5.3 Freeze Plug(s)..


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#1 1stdeuce

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Posted 23 November 2008 - 11:55 AM

Instructions say-to remove left-rear freeze-plug,install heater there..
Under-the-truck,discovered only a brass(?) threaded(?) plug/insert,with a hex indentation (for removal?)..
Did-NOT see any-other 'typical' freeze-plugs,either-side of lower block..

Apparently,things-have-changed since i last did my '93 FoMoCo 460ci; THIS engine is a way-different horse-to-ride!

Truck is on-the-ramps/coolant drained,i'm a-foot till this gets figured-out..probably simple but,i'm still-learning on this unit.LOTS-of-things ain't-the-way-they-were! (grin!)

Any ideas?

'99 Silverado Ls,Maroon,5.3,Bone-Stock,Avon 245/75/16 (LIKE those Avon's!)

'93 Jeep YJ,constant stock restoration (it's a JEEP,after-all!)

'98 SoftTail,Michigan rust/corrosion rescue,95% finished (I'm RIDIN-it!)


#2 MS3DALE

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Posted 23 November 2008 - 12:19 PM

Thats it!! Thats what you need to remove,I think if I remember correctly its a 17mm hex head.

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'07 SILVERADO Z71 LT2 "VortecMAX" 6-Liter,"Super-Duty" Auto Trans,9 1/2" rear-end w/3.73 G80 Locker,XM,On-Star,BOSE speaker system,Stabilitrak,Block Heater,Sunroof,18" ARE "Cannon" Wheels w/LT275/65R18 Goodyear Wrangler AT/S tires.
Custom tune by Justin at Black Bear,CORSA "Sport" exhaust system,EXTANG "Full-Tilt" snapless tonneau cover,Rough Country 1.5" front leveling kit,Fabtech 1" rear lift blocks,EZ-Down tailgate damper.
GM accessories...Hood Deflector,Molded Mud-Flaps,Ventvisors,Catch-All Floor-Mats,Bedrail Protectors,BedRug Bedliner & Bedmat,and a GM Performance Parts cold-air intake.

2011 CAMARO 2SS/RS - LS3/M6 - Inferno Orange Met. - HURST short-throw - Roto-Fab CAI - Kook's LTs - CORSA exhaust - Black Bear tuned (playtoy!)
2012 CRUZE 1LT - Blue Topaz Met. - RS pkg.- Convenience pkg. (work car!)

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#3 1stdeuce

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Posted 23 November 2008 - 12:38 PM

Instructions say-to remove left-rear freeze-plug,install heater there..
Under-the-truck,discovered only a brass(?) threaded(?) plug/insert,with a hex indentation (for removal?)..
Did-NOT see any-other 'typical' freeze-plugs,either-side of lower block..

Apparently,things-have-changed since i last did my '93 FoMoCo 460ci; THIS engine is a way-different horse-to-ride!

Truck is on-the-ramps/coolant drained,i'm a-foot till this gets figured-out..probably simple but,i'm still-learning on this unit.LOTS-of-things ain't-the-way-they-were! (grin!)

Any ideas?



"I think? If i remember correctly?"
I'm assuming those words referred-to the tool-size needed..noticing the # of 'wrenches'/posts you've accumulated,i'm gonna take your word for it. I'm gonna-fix another pot of joe,head-out the door,see-what i can tear-up..

Thank you for your knowledge..

'99 Silverado Ls,Maroon,5.3,Bone-Stock,Avon 245/75/16 (LIKE those Avon's!)

'93 Jeep YJ,constant stock restoration (it's a JEEP,after-all!)

'98 SoftTail,Michigan rust/corrosion rescue,95% finished (I'm RIDIN-it!)


#4 MS3DALE

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Posted 23 November 2008 - 03:23 PM

Well I've installed a couple block heaters in these "GENIII" engines.
Plus I'm the parts manager at a GM dealer so I see these trucks everyday!

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'07 SILVERADO Z71 LT2 "VortecMAX" 6-Liter,"Super-Duty" Auto Trans,9 1/2" rear-end w/3.73 G80 Locker,XM,On-Star,BOSE speaker system,Stabilitrak,Block Heater,Sunroof,18" ARE "Cannon" Wheels w/LT275/65R18 Goodyear Wrangler AT/S tires.
Custom tune by Justin at Black Bear,CORSA "Sport" exhaust system,EXTANG "Full-Tilt" snapless tonneau cover,Rough Country 1.5" front leveling kit,Fabtech 1" rear lift blocks,EZ-Down tailgate damper.
GM accessories...Hood Deflector,Molded Mud-Flaps,Ventvisors,Catch-All Floor-Mats,Bedrail Protectors,BedRug Bedliner & Bedmat,and a GM Performance Parts cold-air intake.

2011 CAMARO 2SS/RS - LS3/M6 - Inferno Orange Met. - HURST short-throw - Roto-Fab CAI - Kook's LTs - CORSA exhaust - Black Bear tuned (playtoy!)
2012 CRUZE 1LT - Blue Topaz Met. - RS pkg.- Convenience pkg. (work car!)

My Garage


#5 OmarR

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Posted 24 November 2008 - 04:41 AM

Dale is right. It is 17MM.

Unbolting the driveshaft at the front, moving it out of the way, and using an impact wrench (or 1/2 inch ratchet) with an extension and a 17MM hex socket makes it an easy 10 minute job.

I originally tried a 17MM hex key with my arm up in there and I could not get enough torque on that sucker to break it loose.
2003 Chevy Tahoe Z71

#6 MS3DALE

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Posted 24 November 2008 - 07:32 AM

Yeah.....I should have added to unbolt/remove the front of the driveshaft,Makes it a lot easier!! :thumbs:

sig1alternate.png
'07 SILVERADO Z71 LT2 "VortecMAX" 6-Liter,"Super-Duty" Auto Trans,9 1/2" rear-end w/3.73 G80 Locker,XM,On-Star,BOSE speaker system,Stabilitrak,Block Heater,Sunroof,18" ARE "Cannon" Wheels w/LT275/65R18 Goodyear Wrangler AT/S tires.
Custom tune by Justin at Black Bear,CORSA "Sport" exhaust system,EXTANG "Full-Tilt" snapless tonneau cover,Rough Country 1.5" front leveling kit,Fabtech 1" rear lift blocks,EZ-Down tailgate damper.
GM accessories...Hood Deflector,Molded Mud-Flaps,Ventvisors,Catch-All Floor-Mats,Bedrail Protectors,BedRug Bedliner & Bedmat,and a GM Performance Parts cold-air intake.

2011 CAMARO 2SS/RS - LS3/M6 - Inferno Orange Met. - HURST short-throw - Roto-Fab CAI - Kook's LTs - CORSA exhaust - Black Bear tuned (playtoy!)
2012 CRUZE 1LT - Blue Topaz Met. - RS pkg.- Convenience pkg. (work car!)

My Garage