Spark plugs
Thread Starter
Junior Member
Joined: Nov 2009
Posts: 33
Likes: 0
From: North Providence
Car: 86 Iroc
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: GU5 323
Spark plugs
My 86 Iroc hasn"t had new plugs in over 6 years ( From the owner before me ) I'm a little nervous on just slapping a rachet on them since they look extrememly rusty. Any " tricks of the trade " to getting them out w/o snapping them??? Thank you
Senior Member
iTrader: (5)
Joined: Jun 2007
Posts: 379
Likes: 1
From: arlington, tx
Car: 90 z28
Engine: 355 with hsr
Transmission: t56
Axle/Gears: 3.73 posi
Re: Spark plugs
wd40 or penetrating oil, let them soak. the worst that could happen is you knock the porcelain off or round off the hex part but that's not likely with the right socket.
Senior Member
Joined: Feb 2010
Posts: 1,125
Likes: 1
From: San Diego, California
Car: Trailblazer EXT 4.2 (Firebird Form)
Engine: 5.1 4bbl
Transmission: 700R4 Mega Raptor Level 4
Axle/Gears: 2.73
Re: Spark plugs
well if you have stock manifolds, then follow the advice from the previous post... if you have headers, perhaps use a small ratchet with an adapter for the spark plug socket... oh and if you have headers, the passenger side is easier from the bottom, also note that if you do change the spark plugs on the passenger side from the bottom, it is a good idea to disconnect the negative battery terminal...
Last edited by KNBlazer; Mar 15, 2010 at 11:14 AM.
Supreme Member

Joined: May 2001
Posts: 2,009
Likes: 5
From: Pitman, NJ
Car: '89 IROC-Z
Engine: Canfield 195 headed 358ci
Transmission: TH350, Art Carr 9.5"
Axle/Gears: 3.92 Dana 44
Re: Spark plugs
As mentioned above, use some sort of penetrating oil on them and let it sit overnight. Personally I'm a huge fan of PB Blaster ...the stuff works wonders.
Supreme Member

Joined: Jan 2000
Posts: 1,179
Likes: 82
From: Mississauga, Ontario Canada
Car: 1987 GTA
Engine: 5.7
Transmission: T5WC
Axle/Gears: 3:27
Re: Spark plugs
Tighten them just a little. Cracks em loose believe it or not. But I mean very little, just enough to feel it. Then turn them out. Put some anti seize paste on the new ones.
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