stripped thread help.

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steve_k
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Fri May 25, 2018 6:56 pm

evening folks looking for a bit of advise.

went to do a mates cambelt on his m20, when i went to remove the upper timing cover i noticed that on the bolts which holds both the upper cover & lifting eye had be helicoiled before & not very well as the coil was still on the bolt when i took it out.

thing is, what the best option to proceed with? retap it & use another helicoil?
or drill it out & retap it to M8 size?

got all the bits here to do either so just wondering which route folk think is best?
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
getting oral sex off an ugly person is like rock climbing.....don't look down ;)
steve_k
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Sat May 26, 2018 9:25 am

anyone?
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
getting oral sex off an ugly person is like rock climbing.....don't look down ;)
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Scotty200
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Sat May 26, 2018 9:49 am

Personally for me if there is enough meat around the hole I would go the drill and retap less chance of the threads pulling out again at a later date
steve_k
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Sat May 26, 2018 10:06 am

Scotty200 wrote:Personally for me if there is enough meat around the hole I would go the drill and retap less chance of the threads pulling out again at a later date
thats what i was thinking, will have a god look today & see if there is enough there to drill it out & retap it.
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
getting oral sex off an ugly person is like rock climbing.....don't look down ;)
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Satan
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Sat May 26, 2018 11:14 am

As above, better a proper job then a bodge.
steve_k
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Sat May 26, 2018 1:37 pm

well it's all done now, used the correct tap & recut it to M8 size, also did the other side while i was there so they both match up.
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
getting oral sex off an ugly person is like rock climbing.....don't look down ;)
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martauto
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Sat May 26, 2018 3:55 pm

steve_k wrote:well it's all done now, used the correct tap & recut it to M8 size, also did the other side while i was there so they both match up.
Just seen this Steve and thats exactly what I would have done and full marks for doing both sides as well mate !!!

Mart, toolmaker by trade.
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paultv
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Sat May 26, 2018 4:24 pm

I have the same issue, looking at the engine from the front its the left hand bolt that runs thru' the lifting eye and into the head? its a bolt with a long shank and end thread if I remember - so M8 is the next tap up? I need to do mine, is there any issue with swarf from drilling, internally I mean?

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martauto
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Sat May 26, 2018 5:09 pm

Dont know exactly but run the drill very slow and put grease on the bit to try and hold onto the cuttings making sure you clear the bit often.

Mart.
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steve_k
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Sat May 26, 2018 6:30 pm

@mart, cheers dude, had a big tub of grease so dipped the bit & tap in it before going very slowly with the drill.

@paultv, thats the one i had to do, M8 is the next step up & a lot stronger when you consider that the engine hangs off there on a hoist.
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
getting oral sex off an ugly person is like rock climbing.....don't look down ;)
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Satan
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Sat May 26, 2018 7:35 pm

Tallow for threading,
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