V-6 COOLANT PIPE DRAIN PLUGS (Page 2/2)
fierosound FEB 11, 12:55 PM

quote
Originally posted by Dennis LaGrua:

Heat is always in the plan , PB is regularly used. Just got to be careful with the torch and we'll probably use a fine point tip. We shall see tomorrow.




Heat and cold shock can break the rust loose.
I used a Freeze Off penetrant to break mine loose on my Indy's pipes.
https://www.amazon.com/CRC-...etrant/dp/B07DT1SGCY
oneinch MAR 08, 01:26 PM
I recommend replacing these internal hex plugs with external hex plugs. These are available from many sources. I use McMaster-Carr. I got SS external hex plugs that take a 7/16" wrench. A better way to go IMO.

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Stanton
'88 Formula, red on gray

reinhart MAR 12, 06:02 AM

quote
Originally posted by oneinch:

I recommend replacing these internal hex plugs with external hex plugs. These are available from many sources. I use McMaster-Carr. I got SS external hex plugs that take a 7/16" wrench. A better way to go IMO.




I sounds good on paper but I'd be a little hesitant with them being the lowest point of the car that it would be easy for them to catch on road debris and damage the pipes or ??

Personally I just keep the factory ones in and never had a reason to remove the plugs. I drain the coolant in the front or rear with a hose and depending on positioning in the driveway can keep a lot of the coolant in the car. Draining at the pipes almost guarantees full coolant draining which is not usually desired.
Dennis LaGrua MAR 12, 09:23 AM
I removed those drain plugs by applying heat, then drilling and using an easy out stud remover. I replaced them with Brass 1/8" NPT hex plugs. Tip: if you do replace them with new plugs use sealant on the threads.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "