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

How to remove pipe plug in driver side head

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Old Mar 31, 2015 | 09:51 PM
  #61  
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Wow..........this thread certainly got off track
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Old Apr 1, 2015 | 04:08 AM
  #62  
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Originally Posted by TA
Wow..........this thread certainly got off track
- we went from a simple question to a pissin' contest -
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Old Apr 1, 2015 | 02:20 PM
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Originally Posted by Joe C
- we went from a simple question to a pissin' contest -
Yes!

To the op; sorry you decided to abandon your pipe plug removal project.

To everyone else who gave their experience, incite, and input.... Thanks, I'll let you all know how it works out for me.
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Old Apr 1, 2015 | 02:23 PM
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Originally Posted by John A. Marker
You could also weld in a grade 8 bolt that has been cut short so the head is about 1/4" space under the head of the bolt to the plug. The heat will help loosen the threads. OH...don't forget to disconnect the battery before welding!

Before this, I would put a mixture of 50% Acetone and 50% trans fluid mixed o the plug to penetrate the threads. I would put this on at half hour intervals and leave over night. Then weld in the bolt and have at it.
Will probably go this route.

I think this is my best course of action now, before I resort to removing the head and doing this on a bench.
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Old Apr 4, 2015 | 01:24 AM
  #65  
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Originally Posted by mako41
Will probably go this route.

I think this is my best course of action now, before I resort to removing the head and doing this on a bench.
is there enough room to get an oxy acetylene torch with a small tip to heat that plug? Or at least a propane torch? (enough) heat will destroy that steel to aluminum corrosion and liberal application of the penetrating fluid of your choice(bee's wax, PB Blast, acetone/trans fluid, etc) should do it; also when you get the plug hot, take an ice cube and push it right into the plug; the heat, cold shock, and penetrating fluid will break that plug free.
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Old Apr 4, 2015 | 05:53 AM
  #66  
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Originally Posted by mtwoolford
is there enough room to get an oxy acetylene torch with a small tip to heat that plug? Or at least a propane torch? (enough) heat will destroy that steel to aluminum corrosion and liberal application of the penetrating fluid of your choice(bee's wax, PB Blast, acetone/trans fluid, etc) should do it; also when you get the plug hot, take an ice cube and push it right into the plug; the heat, cold shock, and penetrating fluid will break that plug free.
pretty tight in there - you can barely see the plug to begin with. if anyone is going to try the torch thing, I might add, get a couple friends with fire extinguishers on standby, notify your local fire department, and check that your home owners insurance policy covers, "oh s**t!" and stupidity -
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Old Apr 6, 2015 | 08:26 PM
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Here is $.02 more. Try the other head between 7 & 8. That is how i did it on one of my cars. Just run the wire around and hide it in the loom. Good luck.
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Old Apr 6, 2015 | 10:39 PM
  #68  
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Originally Posted by Benny42
Here is $.02 more. Try the other head between 7 & 8. .

6 & 8 maybe? But on a '90 I believe it's already in use.

Last edited by WVZR-1; Apr 6, 2015 at 10:50 PM.
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Old Apr 6, 2015 | 11:08 PM
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Originally Posted by WVZR-1
6 & 8 maybe? But on a '90 I believe it's already in use.
Ok, 6 & 8. Then he needs a chip.
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Old Apr 7, 2015 | 05:11 PM
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Originally Posted by Benny42
Ok, 6 & 8. Then he needs a chip.
A chip can only control the main engine fan thru the ECM that runs off the coolant temp sensor. I already have one to do that.

This plug is where the OEM auxiliary fan temp switch is located and would control the OEM auxiliary pusher fan located in front of the OEM A/C condenser and radiator setup. It helps to cool the engine bay but more importantly the auxiliary pusher fan helps tremendously with cooling the condenser is hot summer months when the A/C is working at full blast.
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Old Apr 20, 2015 | 07:34 PM
  #71  
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On my 92 I did some grinding on a 3/8 ext. Like I have heard mention. No one mentioned tighting the plug-- just a little when it moves thats enough to break it loose. After tighting a little the plug backed right out. It worked like a charm for me.

Good Luck
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Old Apr 20, 2015 | 08:12 PM
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Originally Posted by RedCorvette1988
On my 92 I did some grinding on a 3/8 ext. Like I have heard mention. No one mentioned tighting the plug-- just a little when it moves thats enough to break it loose. After tighting a little the plug backed right out. It worked like a charm for me.

Good Luck
thought I said that -- well, something like that....

the last thing I did was reverse the direction of the impact gun and gave it a quick burst - you know, right to tight. after that quick burst, back to reverse-removal mode, and the bolt came out on the next try slicker than s**t!" now maybe that helped, maybe not -
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Old Apr 21, 2015 | 08:52 AM
  #73  
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Joe I missed that. I stand corrected
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Old Apr 21, 2015 | 01:08 PM
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if it's an access issue, can you just undo the motor mounts and jack the engine up a bit? you know, like we used to have to do on factory V8 Monza's to change spark plugs ?
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Old Apr 21, 2015 | 01:36 PM
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We ain't seen the OP for nearly two weeks. I thought he'd be back to say DONE and probably with his resolution to the issue.

Originally Posted by mtwoolford
if it's an access issue, can you just undo the motor mounts and jack the engine up a bit? you know, like we used to have to do on factory V8 Monza's to change spark plugs ?
Hole saw through the "wheel-house". Sealed with cap-plugs.
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Old Apr 28, 2015 | 07:21 PM
  #76  
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I used a ground down ratchet adapter to remove mine, although I have iron heads which won't corrode a steel plug. As for using the "correct tool".... that method leaves you with the exact same tool as what is intended, a snugger fit if anything. Probably better, since most of those locally available specialty tools are going to be autozone china brand. Did you start with a quality brand tool, domestic at least? Impact is always better odds if you can get in there, but impact ratchets are generally pretty weak. And probably no room to get in there and knock it loose with breaker bar + 3lb sledge.
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