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#1 |
Registered User
Join Date: Aug 2006
Location: Georgia
Posts: 850
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How do you remove the square head filler plug?
I'm trying to remove the filler plug/bolt on the rearend to add some more fluid but the square head on it is giving me a hard time. I tried removing it with several different size sockets and pliers but that's just wanting to round off the plug. So does anyone have any suggestions how to remove it or is there a socket or adapter that will remove a square head? Thanks for the help.
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1963 Chevrolet C10 Short Step 1968 Chevrolet C10 Short Step |
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#2 |
Registered User
Join Date: May 2009
Location: Fayetteville, NC
Posts: 725
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Re: How do you remove the square head filler plug?
Take a 3/8 ratchet with a 3/8 extension to give you more room to move the ratchet and just put it in the plug. No socket needed.
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Jason TEAM C10 HOT ROD POWER TOUR
689 Short Step 68 Step Trucks Sold: 70 GMC, 72 K5 Members met: Andy4639 GCncsuHD CSGAS zicc1835 hotrod farm truck Mingrao Bhelton brenthiggins |
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#3 |
Registered User
Join Date: Jul 2011
Location: strausstown pa
Posts: 3,394
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Re: How do you remove the square head filler plug?
If you have the innie plug the 3/8 square head of an extention should work
if you have the outie square plug try a correct size open end wrench if you cant get enough torque to break it free a cheater pipe over the rachet or wench allways worked for me
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81 camaro 355 4/spd 342 posi my first love ![]() 67 swb step 454/4spd ott 373 posi 4/7 drop. 2000 s10 zr2 little blue truck that never gets stuck. '74 heald super bronc vt8. tecumseh powered moon rover. |
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#4 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,622
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Re: How do you remove the square head filler plug?
Heat!! Small propane heaters will apply a little heat.
Or you could whack the head straight on with a hammer then put an open end wrench on it and turn it while hitting it with the hammer. The hammer helps jar it loose. Like a hammer wrench!! Beetle's suggestion is for the style of plug that has a square hole in it. |
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#5 |
Registered User
Join Date: Aug 2006
Location: Georgia
Posts: 850
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Re: How do you remove the square head filler plug?
It's the outward square plug.
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1963 Chevrolet C10 Short Step 1968 Chevrolet C10 Short Step |
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#6 | |
Registered User
Join Date: Dec 2007
Location: Santa Maria, Ca.
Posts: 1,423
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Re: How do you remove the square head filler plug?
Quote:
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#7 |
Registered User
Join Date: Jan 2003
Location: Guntown,MS
Posts: 172
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Re: How do you remove the square head filler plug?
Crescent wrench has always done the trick for me
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1985 K10 Under Severe Reconstructive Surgery 5.3/New Paint/New Interior/Yadda Yadda Yadda |
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#8 |
Registered User
![]() Join Date: Jan 2012
Location: Whitesboro, Texas
Posts: 932
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Re: How do you remove the square head filler plug?
Make sure there is no debris in the square. If there is it will limit how far the 3/8 extension will fit and can cause the rounding you're describing. They do make a proper tool for the plug - it's called a pipe plug socket. Not real easy to find locally though. I've heard of guys welding a bolt to the plug for removal if it was really stuck or severely rounded off before. Hope you don't have to go to those measures.
Just read where you have the outy not the inny. Try an Oklahoma speed wrench (AKA Cresent or adjustable wrench). You could also try vise-grips too. Good luck!
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Cheers - Wayne Our Shop Build - http://67-72chevytrucks.com/vboard/s...d.php?t=620966 '55 Wagon Build - http://67-72chevytrucks.com/vboard/s...d.php?t=689157 1971 Cheyenne Super Ochre/White LWB 350 Auto - my son's truck "Nancy" 1972 GMC K2500 Custom 4X4 Olive LWB 400 SB 4-speed -"Greenie" - Restoration to begin after the '55 Nothing sucks more than that moment during an argument when you realize you're wrong. |
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#9 |
Moderator
![]() Join Date: May 2007
Location: Southern Cal
Posts: 20,005
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Re: How do you remove the square head filler plug?
Spray it with some PB Blaster, liquid wrench, etc. Use a pair of vise grips instead of pliers. Good luck.
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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#10 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: How do you remove the square head filler plug?
alota of good sugestions// turn counterclockwise to loosen
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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#11 |
Registered User
![]() Join Date: Jan 2007
Location: Central Coast California
Posts: 1,026
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Re: How do you remove the square head filler plug?
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1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold ![]() 1972 C10 5.3L/4L60E 12bolt 5Lug - Sold ![]() 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! ![]() 1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold ![]() ![]() ![]() 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold ![]() 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) ![]() 2003 K2500HD 8.1/Allison1000/NP263 ![]() |
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#12 |
Registered User
![]() Join Date: May 2007
Location: Rapid City South Dakota
Posts: 2,359
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Re: How do you remove the square head filler plug?
Use a 12 point socket, or a 12 point box end wrench, or an open end wrench/cresent wrench.
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Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299 |
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#13 | |
Eat, Sleep, Drive a Chevy
Join Date: Apr 2010
Location: the town of the cow, Texas
Posts: 1,152
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Re: How do you remove the square head filler plug?
Quote:
![]() when you get the old one out throw it as far as you can, then go get a internal hex headed plug that you can use an allen wrench to take out. good luck
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Trey Silence may be Golden, but Duct Tape is Silver! 72 Short Step 57 "big window" short step |
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#14 | |
Senior Member
![]() Join Date: Oct 2011
Location: Lewiston, ID.
Posts: 627
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Re: How do you remove the square head filler plug?
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Wade ![]() , JUST WALK AWAY, AND I'LL SPARE YOUR LIVES!!! , Build thread "TANGERINE" http://67-72chevytrucks.com/vboard/s...d.php?t=498570 Board Members Met: bigblock68, ol_skool_chevy ,68TT,atvpro |
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#15 |
Registered User
Join Date: Nov 2011
Location: Kirkland, WA
Posts: 343
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Re: How do you remove the square head filler plug?
Yep, spray with penetrating oil - leave overnight. Open end or Cresent and if really rusted and you have a good bite, use a cheater if not a little heat from a small propane or mapp torch. Don't chew up the head with pliers.
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#16 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,641
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Re: How do you remove the square head filler plug?
If it's already boogered up and you still can't get it loose, try a pipe wrench. The more force you put on it, the tighter it will grip. And it's easy to slide a cheater pipe over the handle....
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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