HELP................ FPR BOLT ISSUE

I prefer these

INSERTS KEENSERT - Engineering Parts from Small Parts & Bearings

into alloy.

While those are better than the standard helicoils..

they are a bit of a pain to fit in and get level in restricted spaces if you're using the stock tools.

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Originally Posted by Blknight.aus

that will helicoil really easily.

its soft ally, its stripped out to so close to the nominal diameter for the helicoil tap that you wont need to drill it

carefully wind in the helicoil using a 1/4inch drive version of the tap (or use adaptors so you can use a 1/4 inch drive) and wind it in with a 1/4 inch ratchet.

go in with plenty of thread cutting lube or light machine oil to keep the swarf under control then wind in the helicoil.

ensure 2 things .

1. you capture the tang once you break it off
2. the helicoil is wound in at least 1/2 turn lower than the mounting face.

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Would this apply to the sump plug? The no drilling bit?

Quote:

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Originally Posted by Bohica

Would this apply to the sump plug? The no drilling bit?

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It depends on how its stripped out.

but I wouldnt helicoil the sump plug as helicoils are not generally rated as being fluid tight and yes while the thread doesnt seal a td5 sump plug setting up the helicoil will take you out into the sealing face area.

A threadsert similar to this one ST-N1901B - Thread Insert for Pinion Support Bolt Holes for Aluminum Gear Case- Currie Enterprises is a better answer in this position but preperation and the correct sealing goop is key to a good job. I like loctite 680 for the external thread and 222 or 567 for the internal thread with a dowty style sealing washer

RE: sump plug, you could run a tap through it, and use an oversize plug. Pretty sure they would be available from repco etc, as this is a common problem. I remember seeing a cabinet on the wall of a garage with many oversize plugs in it.

Rethread to larger size to accept an adapter which is loctighted in into which the plug screws. Thread repair man next door does hundreds like that eg many chooktins.