Heli-coil Spark Plug Threads, How Reliable?

85_SS_302_Coupe · Aug 31, 2013

I did a search and every thread I found had too much stupid crap in it so I'll just cut to the chase. I have an '03 Vic and it blew out the #3 plug, destroying/melting the COP boot. I got the COP off and tried to tighten the plug but it just keeps spinning. I keep getting mixed reviews on the heli coil stuff, some say it may not work at all while others say it's a miracle cure and even others say it will eventually blow out too. Swapping heads is really not an option, I need this car back on the road by Monday and don't have all day Sunday to replace the head, nor do I want to spend that kind of cash.

So, what's the verdict? Which kit is the best to use? I may just end up renting the kit from a parts store so I may be at the mercy of whatever they loan out.

Deleted member 38176 · Aug 31, 2013

Ive been on my helicoil for about 1.5 years without a single issue (just recently under heavy boost).

85_SS_302_Coupe · Aug 31, 2013

Nightfire said:
Ive been on my helicoil for about 1.5 years without a single issue (just recently under heavy boost).

I just keep getting very mixed opinions, there doesn't even seem to be a gray area, people either love them or absolutely hate them. It's pretty much going to happen, I don't really have the option of swapping the head right now, I guess I'm more or less looking for support and suggestions at this point.

Deleted member 38176 · Aug 31, 2013

Actually I completely forgot that when I had my heads rebuilt they repaired the threads. So I no longer have the helicoil since being boosted.....but I did go almost 2 years on a helicoil N/A

sneaky98gt · Sep 1, 2013

Nick McKinney says that the Timeserts are better than OEM in these cars. http://www.modularheadshop.com/howtoproperlyinstalltimesertsinmodularheads.aspx

Not sure if I'd want to tackle it with the head on the car, though. Although, don't you have to drill it out with the Heli-coil also?

trombonedemon · Sep 1, 2013

My car blew a plug so the mechanic fixed with helicoil, I went to change the spark-plugs and the damn helicoil came out. Go time sert, it is a permanent fix. Can be done while the head is still in the car

85_SS_302_Coupe · Sep 1, 2013

sneaky98gt said:
Nick McKinney says that the Timeserts are better than OEM in these cars. http://www.modularheadshop.com/howtoproperlyinstalltimesertsinmodularheads.aspx

Not sure if I'd want to tackle it with the head on the car, though. Although, don't you have to drill it out with the Heli-coil also?

trombonedemon said:
My car blew a plug so the mechanic fixed with helicoil, I went to change the spark-plugs and the damn helicoil came out. Go time sert, it is a permanent fix. Can be done while the head is still in the car

Yeah I guess by "heli coil" I was lumping the Timesert in with it. My only problem will be if I can't buy that kit locally at one of the parts stores, as I can't wait for shipping to order it. My understanding was that it is a pretty permanent fix. That link is the first I've ever heard about it being better than the OEM threads, but in a way I could see how that would be possible.

sneaky98gt · Sep 1, 2013

85_SS_302_Coupe said:
Yeah I guess by "heli coil" I was lumping the Timesert in with it. My only problem will be if I can't buy that kit locally at one of the parts stores, as I can't wait for shipping to order it. My understanding was that it is a pretty permanent fix. That link is the first I've ever heard about it being better than the OEM threads, but in a way I could see how that would be possible.

Yea, I'm not sure that I've ever seen a Timesert in a local store. I see HeliCoil kits all the time. Matter of fact, I just used one on my DD ('01 Civic) just this past week. Got it from O'Reilly, and they had pretty much every size possible.

I could see where they would be stronger, especially in aluminium, since the kit's outer threads are larger than the original ones, and now your inner threads are made out of steel instead of soft aluminium.

85_SS_302_Coupe · Sep 1, 2013

Well looks like I'm opting out of this one. I found a guy who's going to do the job for me for $200, including a new COP and plug installed. I believe he has/uses the Timesert kit.

Rick 91GT · Sep 1, 2013

85_SS_302_Coupe said:
Well looks like I'm opting out of this one. I found a guy who's going to do the job for me for $200, including a new COP and plug installed. I believe he has/uses the Timesert kit.

The timesert is the only way to go....works great.

Sent from my XT907 using Tapatalk 2

Deleted member 38176 · Sep 1, 2013

I suppose I should rectify and say I used a timesert. I thought they were the same thing

flstang65 · Sep 1, 2013

I use Timeserts or, similar products whenever possible. That's what we use in the Army. Helicoils aren't bad. I have had good luck with them in the past but, I just like to be 100% sure with the timeserts.

The thread repair kits that are available for this repair are pretty bad ass too.

blsticms1 · Sep 1, 2013

who sells the timesert kits ? i want to order a set for this winters build

Rick 91GT · Sep 2, 2013

blsticms1 said:
who sells the timesert kits ? i want to order a set for this winters build

http://www.amazon.com/gp/aw/d/B0038B325I
Sent from my XT907 using Tapatalk 2

Noobz347 · Sep 2, 2013

Here's another link for the same thing that Rick posted but not in the mobile skin:

http://www.amazon.com/dp/B0038B325I/?tag=stangnet-20

Heli-coil Spark Plug Threads, How Reliable?

85_SS_302_Coupe

it sucks (I know) to be on the receiving end

Deleted member 38176

85_SS_302_Coupe

it sucks (I know) to be on the receiving end

Deleted member 38176

sneaky98gt

trombonedemon

Well-Known Member

85_SS_302_Coupe

it sucks (I know) to be on the receiving end

sneaky98gt

85_SS_302_Coupe

it sucks (I know) to be on the receiving end

Rick 91GT

Mustang Master

Deleted member 38176

flstang65

blsticms1

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Rick 91GT

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Noobz347

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