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Guest Message by DevFuse
 

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Heli Coil Help!


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11 replies to this topic

#1 Vegablade

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Posted 07 July 2005 - 11:23 PM

alright quite a while back my exhaust got smashed by a huge rock and when i got under the car i noticed a bolt was missing on the passenger side. so i go to tighten it up and all of a sudden the bolt falls out with most of the threads and the pipe wasnt even close to flush. so since then i have bought some heli coils and have straightened thet pipe. now the guys at the parts place said i needed a special tap. is he lying to me, and has anyone done a heli coil on exhaust. its a 10mm by 1.25pitch bolt. im going crazy not being able to drive my car. also all i know about the coils is whats on the box,

770-3025
M10x1.25
Metric
Thread
Repair
Inserts

#2 TomRhere

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Posted 07 July 2005 - 11:30 PM

Yes, special size drill bit and tap for doing a Heli-coil. Drill out hole, tap in threads, insert Heli-coil, install normal bolt into new threads.

#3 Vegablade

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Posted 08 July 2005 - 01:00 AM

but what size hole and tap pitch

#4 Ross

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Posted 08 July 2005 - 02:23 AM

You need a special Heli-coil tap, its not a standard size.

#5 Vegablade

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Posted 08 July 2005 - 08:13 AM

crap! the kits are like 60 bucks.

#6 ballitch

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Posted 08 July 2005 - 08:32 AM

10 mm is close to 7/16'' right? cant you just drill out the heli coil a little bit, then put in a 7/16'' bolt after you tap the heli coil to 7/16''?





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#7 Vegablade

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Posted 08 July 2005 - 09:13 AM

no, heli coils are like little springs.
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#8 NoahDL88

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Posted 08 July 2005 - 10:57 AM

I used the 7-16th on mine, worked like a charm, use 7/16th bolts and you'll be good to go.

#9 NorthWet

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Posted 08 July 2005 - 12:49 PM

crap! the kits are like 60 bucks.

Last time I got a heli-coil single-size kit (a year ago?) it was only about $20. Do you have the install tool, or did you just buy a package of coils?

11mm x 1.25 might be a better choice then 7/16th inch. Approx same size as 7/16ths, same size and pitch as head bolts, and keeps it metric (I hate mixed-standard vehicles).

#10 s'ko

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Posted 08 July 2005 - 01:32 PM

I also found that 7/16th is an odd size. Home Despot doesn't have then and the ones at the autoparts stores are often too short. Solved it by buying one that was 3 inches long and hacking it down.

#11 NorthWet

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Posted 08 July 2005 - 01:36 PM

I also found that 7/16th is an odd size. Home Despot doesn't have then and the ones at the autoparts stores are often too short. Solved it by buying one that was 3 inches long and hacking it down.

Are you talking about it being an odd size for bolts??? If so, not around here. :-\

#12 Vegablade

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Posted 09 July 2005 - 03:21 PM

see, i have the coils i just didnt buy the tap or install too because i figured i could use the bolt to install it and the tap would be some normal size. guess i will have to save my money, man my subaru hasnt been going for like 2 months now, its driving me crazy.




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