GMC-IH

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DoubleDingo

Full Access Member
Joined
Jul 3, 2012
Posts
11,809
Reaction score
18,569
Location
Right where I am
First Name
Bagoomba
Truck Year
1981
Truck Model
81-C20 Silverado Camper Special-TH400-4.10s
Engine Size
Carb'ed Vortec 350
The way I removed them is with a punch ..
Hammer on one side to get them tilted in the bore then with vice grips pull them out of the block ..
A few of them was so rusted that the punch broke though the wall ..

Most certainly they was going to leak in a very short time if they wasn't replaced ..
Always do a replacement when rebuilding a motor .. Save a bunch of grief down the road ..
And easy insurance for a very long time especially with the replacements being brass.
 

legopnuematic

Licensed Junk Dealer
Supporting Member
Joined
Oct 27, 2016
Posts
3,132
Reaction score
8,639
Location
MO
First Name
Spencer
Truck Year
1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
Truck Model
Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
Engine Size
225/6, 350 c.i., 350 c.i., 5.9l Cummins
Agree on changing freeze plugs, because it’ll never be the one that’s easy to get to that starts leaking.

Always be on the back of the block or behind the motor mounts.
 

dragstews

Full Access Member
Joined
Mar 27, 2024
Posts
333
Reaction score
1,235
Location
Belleview Florida US of A
First Name
Jesse
Truck Year
Body 1954, frame 1975
Truck Model
R-100
Engine Size
406 ci SBC
Changing out the power steering pump reservoir ..
Didn't like it tilting that much ...
Soon to see if I helped the cause or made it worse ?
 

dragstews

Full Access Member
Joined
Mar 27, 2024
Posts
333
Reaction score
1,235
Location
Belleview Florida US of A
First Name
Jesse
Truck Year
Body 1954, frame 1975
Truck Model
R-100
Engine Size
406 ci SBC
Plumbed the oil sending unit ..
It's the og 1954 IH, keeping all the stock gauges on line ...

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After all these years they still work ..

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