C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Spark Plugs at 70000 miles

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Old 09-23-2016, 07:48 PM
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Carguytroy1
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Default Spark Plugs at 70000 miles

I'm thinking of changing the plugs on my newly acquired 1995. Car runs fine, I've just always replaced filters, plugs, brakes etc anytime I've bought a used car. I do not think these have ever been changed. I'm a little afraid of stripping things where the car has aluminum heads and most likely are original equipment. Should I soak the plugs somehow first?
Old 09-23-2016, 08:13 PM
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antfarmer2
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Mine came out just fine at 100thou just do not forget the antisiez. Get a twist ratchet for the back pass side. I pulled the fender wells off.
Old 09-23-2016, 08:53 PM
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That's encouraging. Still a nervous about it. The guy I bought it from was the second owner. really a pretty nice car, but some of the maintenance seems to be lacking. The coolant had never been changed. Looked like mud. Runs like a champ I just have always changed all that stuff
Old 09-23-2016, 09:08 PM
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antfarmer2
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Originally Posted by Carguytroy1
That's encouraging. Still a nervous about it. The guy I bought it from was the second owner. really a pretty nice car, but some of the maintenance seems to be lacking. The coolant had never been changed. Looked like mud. Runs like a champ I just have always changed all that stuff
Start with a easy one. pull the knock sensors to get a proper flush. I would put in new ones 14 lbs torque is important. Just pinch the connectors with your fingers to remove.
Old 09-23-2016, 09:58 PM
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I had the dealer I work for do the coolant flush. Took 45 minutes to get clear clean water. It was super bad. I might tackle the plugs Sunday. Among other maintenance things on the car. Changing other fluids etc.
Old 09-23-2016, 10:14 PM
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BrandensBeast
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Originally Posted by Carguytroy1
I had the dealer I work for do the coolant flush. Took 45 minutes to get clear clean water. It was super bad. I might tackle the plugs Sunday. Among other maintenance things on the car. Changing other fluids etc.
I was intimidated to do spark plugs and wires on mine, make sure they're gapped properly and you should be all good
Old 09-23-2016, 11:11 PM
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antfarmer2
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Originally Posted by Carguytroy1
I had the dealer I work for do the coolant flush. Took 45 minutes to get clear clean water. It was super bad. I might tackle the plugs Sunday. Among other maintenance things on the car. Changing other fluids etc.
To bad they left a bunch of crap in it. I flushed mine three times driving each time. Then drain it as much as I could then pulled the knocks got over a gallon of crap out of it and had to run a wire in it to break it up. And my coolant has been regularly changed and look great.

Last edited by antfarmer2; 09-23-2016 at 11:17 PM.
Old 09-24-2016, 12:29 AM
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Carguytroy1
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The only thing that bugs me on the plugs are how long they've been in the car. On the newer cars they say no tune up for 100000 miles. I think that's too long to leave them in. They may last that long but way Too hard to get them out later.
Old 09-24-2016, 10:07 AM
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ddahlgren
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If there were installed correctly they will come out. You might be better off than having a backyard mechanic install new ones dry and over tightened.

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