rebuilt engine
Thread Starter
Instructor
Joined: Oct 2004
Posts: 185
Likes: 0
From: kill devil hills nc
rebuilt engine
I have recently purchased a 71bb. It was in the middle of a frame off restoration.The guy had to sell before completing. The 454 engine was rebuilt in 2000. It was tested and ran fine. It has been sitting ever since with no coolant or hoses hooked uo to it. I took the valve cover's off and everything looked good. I took the waterneck off and it was pretty rusty in there. My question is, since the car has been sitting for awhile with no coolant in it and I am about 3 months away from getting it back together, should I flush it out now???? If so with what?
thanks
thanks
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Not right now, then Prestone AS100
No ... don't do it now ... wait until you're ready to install coolant.
Then ... I'd suggest a real good coolant system CLEANING ... not just a flush but a real cleanout. Best stuff out there is at GM parts dept ... GM P/N 12346500 it's actually Prestone P/N AS100 Heavy Duty Cooling System Cleaner ... but you'll rarely find it anywhere but dealer ... under $10 ... strong powdered stuff, not those wimpy liquid flushes you'll find at WallyWorld or Advance ... wear eye protection. Get a free DexCool plugged radiator service bulletin (#99-06-02-012D) printout at GM dealer Svc Dept ... use it as a guide & it'll walk you through a cleaning procedure that REALLY works. BTW ... proper procedure w/ AS100 takes about 4 hours at high-idle & it requires a new t'stat & cap AFTER cleaning. Refill w/ new coolant, DISTILLED water, and a new t'stat & cap.
Then ... I'd suggest a real good coolant system CLEANING ... not just a flush but a real cleanout. Best stuff out there is at GM parts dept ... GM P/N 12346500 it's actually Prestone P/N AS100 Heavy Duty Cooling System Cleaner ... but you'll rarely find it anywhere but dealer ... under $10 ... strong powdered stuff, not those wimpy liquid flushes you'll find at WallyWorld or Advance ... wear eye protection. Get a free DexCool plugged radiator service bulletin (#99-06-02-012D) printout at GM dealer Svc Dept ... use it as a guide & it'll walk you through a cleaning procedure that REALLY works. BTW ... proper procedure w/ AS100 takes about 4 hours at high-idle & it requires a new t'stat & cap AFTER cleaning. Refill w/ new coolant, DISTILLED water, and a new t'stat & cap.
