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plugs against the fire wall

1339 Views 4 Replies 4 Participants Last post by  Pete04222
what is the correct way to change the spark plugs against the firewall of a 81 308
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For all others, the reason gto4sun is having troubles with the forward plugs is because the firewall is very close to the front head and there is not enough room to get the required socket/extension/ratchet assembly down the plug well.

This is what works for me:
After removing the wire, blow some compressed air down the hole to remove any debris. If you don't have a compressor, a length of tubing and lung power should do the trick. Take a 3/8" drive spark plug socket that fits down the plug well easily (I had to grind a bit off the outside of my socket) and remove the rubber insulator protector inside the socket. Drop the socket down the hole over the plug. Take a 3" extension and put that down the hole and onto the socket. The top of the extension is just sticking up over the valve cover. Put your ratchet on that and loosen the plug. When the plug is completely unthreaded, remove the ratchet. Now the tricky part - pull the extension out with one hand and grab the socket with the other hand. Remove the extension and then remove the socket. The plug is still in the well. I use a magnet to fish that out.

To reinstall, take a 6" piece of 3/8" fuel hose and put it over the spark plug insulator. Insert this into the spark plug well and use the hose to start the plug. Pull the hose out and drop the socket down the hole, add the extension and then the ratchet. Tighten the plug then remove the ratchet, then the extension and socket as above. The reason I said to remove the rubber socket insert earlier is because when the plug is tight, the rubber insert grips enough that you have to remove the plug to get your socket back (trust me on that one!). I would recommend keeping this socket in the trunk of the car and buying another one to use on the rest of your cars.

Good luck!!
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Pete - it definitely sounds like you've used a bit of trial and error to work this one out!! Sounds like an excellent answer though.
By the sound of that I'd be making double-sure that the plug threads correctly on the way back in & doesn't cross-thread. Try lubing the threads with some WD40 so that you can "spin" the plug with your fingers while it is still on the flex-tubing. If it gets tight straight away DON'T put the ratchet on - take it out and try again.

I look forward to doing these contortions myself in the VERY NEAR FUTURE (do you hear that Mondial 3.2 owners? C'mon! I'll love your car more that you ever could so sell it to me NOW!) :green:
(I think I'm getting a bit twitchy about this Ferrari thing - 372 posts and not a car in sight, dammit!)
4kids3fish said:
By the sound of that I'd be making double-sure that the plug threads correctly on the way back in & doesn't cross-thread. Try lubing the threads with some WD40 so that you can "spin" the plug with your fingers while it is still on the flex-tubing. If it gets tight straight away DON'T put the ratchet on - take it out and try again.

I look forward to doing these contortions myself in the VERY NEAR FUTURE (do you hear that Mondial 3.2 owners? C'mon! I'll love your car more that you ever could so sell it to me NOW!) :green:
(I think I'm getting a bit twitchy about this Ferrari thing - 372 posts and not a car in sight, dammit!)
You can't put enough torque on the plug to cross thread it when using the hose. I use this trick to start the plugs on all my cars where I can't put my fingers on the plug. I spin them all the way down to the gasket before putting a wrench on them.
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