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Message started by cybofax on 12/30/06 at 04:12:48

Title: Anyone helicoiled the L130 (black bolt)?
Post by cybofax on 12/30/06 at 04:12:48

Hi all!

Has anyone helicoiled the L130 (black bolt) on the head cover - and if so any hints?  Mine is stripped and weeps oil.  It seems I'll have to remove the head to do it  :(
What size coil will I need?  They seem to come in different pitches and lengths.

(BTW - seasons greetings to all!)


Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by lancer on 12/30/06 at 05:03:27

I need to do the same thing, but have not taken the head & cylinder off yet.  Too many things happening lately to get to it yet.  I was thinking of doing all of those long bolts at the same time.  That would eliminate a future problem of another stripped threads situation.

Remove the black bolt and take it to your favorite hardware store where the heli-coils are kept and they will have a guage which will tell you the size, threads/inch, whatever you need for a proper fit/application.

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by cybofax on 01/14/07 at 14:46:11

I've managed to effect a temporary fix!  

I ran a length of M6 threaded rod from the local hardware store down the L130 hole - it seems to go slightly deeper that the L130 bolt and has found enough thread to fasten securely.  I cut it off to size with a hacksaw - placed the gasket washer and a washer over it and ran an M6 nut down the protruding part of the rod - hey-presto - no weeping oil!

This gives me a bit of a breather while I locate helicoils and a gasket set for a permanetnt fix.

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by LANCER on 01/14/07 at 21:06:57

That sounds like a pregnant idea.

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by steveh on 01/17/07 at 16:03:58

I bought the M6 helicoil kit today($40!). I will let you know how it works out.

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by steveh on 01/17/07 at 17:07:28

Looking at how far down in the cylinder wall the threads begin, I can't see how it is possible to install the helicoil insert.  I'll see what I can come up with and let you all know. If that does not work, I may use the threaded rod trick.

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by cybofax on 01/17/07 at 22:38:22

good luck!  I've resigned myself to the fact that I'll have to take the head off to install the helicoil - which is why I've come up with an alternative for now.  Keep us posted!

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by steveh on 01/18/07 at 04:02:31

I've got the head off and the engine on the bench, but I still don't see a way to install the helicoil. I'll keep you posted.

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by steveh on 01/18/07 at 12:41:36

Does anyone know the source of the oil that leaks up around this bolt? I am thinking of JB weld or some other epoxy product at repair the threads but don't want to seal up an oil gallery!

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by steveh on 01/19/07 at 05:11:59

I was wrong! (I think). Looking more carefully at that hole in the cylinder wall, I think the reason I thought the threads started so far down is that they have been completely stripped out near the top!  I will attempt the helicoil this weekend and let you know how it turns out.

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by Kropatchek on 01/19/07 at 08:55:51


steveh wrote:
I bought the M6 helicoil kit today($40!). I will let you know how it works out.


Oke, you got the kit.
Try to drill the hole on a vertical drilling machine if you can.
Tap the thread with the special supplied tap by hand using a T-handle. One turn and 1/4 turn back  till 1 1/2 lenght of the coil.
Insert the helicoil in the grove of the supplied T-handle,  turn carefully, don't push, untill the coil is approx. 1/8" under the surface of the head.
Break-off the end piece with needlenose pliers.

If you knew allready how to do helicoilsh1t disregard this post, maybe this will help others.

Greetz
Kropatchek ;D

Did approx 36 M6 helicoils once in the cilinderhead of a Honda S600.

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by steveh on 01/20/07 at 09:20:36

Success! The helicoil repair worked perfectly. The kit I used is part number HC 5546-6 (M6X1) from Carquest. It comes with 12 inserts and cost $40.

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by cybofax on 01/20/07 at 09:45:41

yes, yes great! but where are the pictures?   :)

Congratulations!  Thanks for keeping us posted.  Out of curiosity, how long are the helicoils?  Does M6 x 1 mean 1 cm long?  If they were too long  would it be possible to cut them or do they have to be the right length.  I'll be shopping for mine soon.

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by verslagen1 on 01/20/07 at 10:45:13

M6x1 is the metric thread designation.
M means metric
6 or 6mm is the bolt diameter ( a little less than 1/4")
x1 is the pitch of the thread or for every turn of the screw 1mm progression.
english thread designation is 1/4x20 or 1/4" diameter bolt and 20 threads per inch.  Which means for every turn the bolt progresses 1/20" (.02" or 1/2 mm)
Comprende?

Title: Re: Anyone helicoiled the L130 (black bolt)?
Post by steveh on 01/20/07 at 14:44:44

Off hand, I would say the coil inserts are about 3/8 inches long. They probably could be cut shorter if necessary.

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