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There is a threaded sleeve in the sparkplug hole. its not a helicoil but and it look original

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Well its acting as a sort of heli coil isnt it.If it aint broke dont fix it

Posted on May 23, 2011


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1 Answer

Got a 95 Chevy Monte Carlo LS I can't get my last valve to tighten down think the hole is script what should I do r how to fix that

Take it back off, Buy a helicoil set. Basically.. Drill the hole out, tap it out to a bigger size. insert the heicoil(which reduces it to the size of the bolt.. A good heicoil set will have the drill bit, helicoils, tap, and the tool to insert the helicoil. Put down rags to catch the metal shavings while drilling and tapping. Then clean the tapped hole(Brake clean and blow it out with air) and use thread lock on the helicoil. Make sure the helicoil sets down below the surface..

May 07, 2016 | Cars & Trucks

1 Answer

How do I fix a block that has pulled the threads out of the hole for the head bolts. This engine is a dual overhead cam out of a 2001 cadilac

3 things you can do here;

1 You can re-tap the hole one size larger and use a larger diameter bolt or stud. If you use this solution the component being bolted down will have to have a clearance hole drilled in it to take the larger diameter bolt or stud

2 If you're dealing with stripped stud hole you can re- tap the hole one size larger and use a" stepped " stud . One end is the larger thread the rest of the stud is the original diameter and thread.

3 The best solution, particularly if your dealing with a thread in an aluminium casting, is to fit a thread insert. These are sold under a range of names e.g Helicoil, Recoil, and come as a kit made up of a tap, a quantity of thread inserts and an insertion tool. Each kit only covers one thread size.

Hope this helps

Dec 04, 2012 | Cadillac DeVille Cars & Trucks

1 Answer

The threads are stripped where #3 sparkplug goes into block. Mechanic friend used Flexicoil to rethread. Worked okay for awhile, then the plug blew out again. Tried temp fix of using Loctite. Again,...

In my estimation,the only fix is to have a mechanic take the head off and weld a plug in the hole, then drill and tap the hole for a new plug. If you do not want to do this then retap the hole slightly larger with good threads, then select the correct helicoil to use in the hole and put in the plug. That should last the life of the car and allow removal of the plug. See:

the problem with glue type metal cements is they nwill not take the internal pressure of the firing of the chamber.

Jan 07, 2011 | 1986 Mazda 323

1 Answer

One of the belt wheels are very loose,when looking down in hood the furthest belt wheel down the bottom is the one that is loose i tried to tighten it but the bolt just turns completly don't know how to...

you may have stripped the thread on the bolt or the hole it goes into, if that is the case the hole will have to be drilled and helicoiled to bring it back to its original bolt size and the bolt replaced
You may be able to drill the hole out and tap a new thread using a bigger size thread tap and bigger bolt, this would be the cheaper option if the dollars are tight
Hope this helps

Jun 26, 2010 | 2000 Toyota Corolla

3 Answers

My spark plug keeps popping out of its socket, Mechanic said I will need a new engine bcause of this ??

You can get a HELICOIL spark plug repair kit and repair this yourself or replace the head cylinder

Apr 09, 2010 | 1995 Acura Legend

1 Answer

Stripped sparkplug holes

There is a way of doing it.Its called helicoils.The people that do it,charge you for it and its not you doing it.Its not the best thing to do but done properly it will work.You have to hunt around the phone book because most workshops will want to do the job themselves and want to pull the head off the engine.I am NOT endorsing the helicoil but just saying what is out there to fix what you asked.Me?I would pull the head off the motor.Hope this helps you

Nov 11, 2009 | 2000 Volkswagen Jetta TDI

3 Answers

1997 ford expedition spark plug blow, its all strip. its an aluim head. is there a quick fix or do i have to replace the whole freaking heads?

The Spark Plug hole can be repaired. The professional way is to remove the cylinder head, and use a repair such as a Helicoil.

The spark plug hole is tapped out to a larger thread size, with a special Helicoil tap. Loctite or some other form of thread locker is applied, and the Helicoil is inserted.

Helicoil's are made of Stainless Steel, and are much better than the original material used in the cylinder head. (Be it cast iron or aluminum)
Drag racers use Helicoil's in their engines.

Tapping out the spark plug hole for a Helicoil, or using a special thread chaser, is NOT a good idea, while the cylinder head is still installed on the engine.
The tap creates chips of metal which fall down into the cylinder.
Using a vacuum to try to alleviate the chips, falls short of a good repair job.

Sep 30, 2009 | Ford Expedition Cars & Trucks

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