I needed new plugs for the 86 Fiero SE I just got, and I need to know the torque specs on it. Any help?

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Just call me Vic, not my screen name.

The Haynes manual calls for 84 to 180 in-lbs.

Thanks! Why is there such a large space for adjustability?

Because any torque within that range has been determined to be satisfactory. 84 in-lbs (7 ft-lb) is high enough to guarantee adequate plug seating and retention, and 180 in-lb (15 ft-lb) is low enough not to damage the plug or threads.

In the case of bolted connections, the purpose of an assembly torque spec is to guarantee a certain amount of preload in the bolt or stud. But in the case of spark plugs the primary purpose of the torque spec is to guarantee adequate plug seating 1) to achieve gas sealing, and 2) to provide controlled heat flow out of the plug into the head. FWIW, most spark plugs that are installed without using a torque wrench end up being overtightened.

[This message has been edited by Marvin McInnis (edited 09-05-2009).]

Good info, but is there any way to get at the plugs on the other side of the engine? Me and my friends worked for ages tryiog to find a way, but no luck.

Some folks remove the deck lid while others will pull a bolt out of the bone then use a ratchet strap from trunk latch to engine eye hook to gain an extra inch or two.

I usually use a ratchet with a head that articulates, a 4-inch extension and a thin walled plug socket. I can fit my arms back there although it's not comfortable and I get scratched up but i don't need to move the engine or anything.

If you're new to Fiero's and removing the front side plugs, you'll need to clean out the plug wells of debris, strong air hose works as well as maunaly cleaning with a pick. An overnight soaking of PB blaster will be your best friend, use anti-sieze on your new plugs.

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jetman
Silver 86 SE 2M6 4-speed, with "check wallet light"
Now fortified with 8 essential slices of bacon goodness

Remove the decklid, and spray down the plugs with PB blaster. Take a pointy scribe and dig out the rust and debris from around the plug. This helps you get the socket completely on and prevents the debris from going into the engine when you remove the plug.

Thanks. jetman was right, this is the first Fiero Ive ever owned. Before I found mine and fell for it, I never thought I would own a Fiero.

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Just call me Vic, not my screen name.