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Messages - TheBoy

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94486
General Discussion Area / Re: Stripped sump thread :(
« on: 19 August 2007, 13:43:28 »
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Not wanting to be to technical but....

The shear strength of the female thread in the aluminium will limit the axial load on the bolt (hence it strips IF its over tightened.....). If you then fit an insert, the area under shear increases as radius squared, and you can allow the bolt to take more of its design strength axial loading. This is because the yield stress in shear of the helicoil material is much higher than that of the aluminium.


Basicly, the aluminium thread is now longer and hence gives more support, the stainles steel helicoil is way stronger than the aluminium and the result is....a much stronger thread.

Plus they are much easier to work with as the helicoil is a precision formed thread and not a rough cut thread in an casting!

 :y
Makes a lot of sense once explained.

Thanks for the explaination :y - as said, certainly wasn't disagreeing with anyone, just trying to understand :y

When undoing, does the helicoil ever come out?

94487
General Discussion Area / Re: Stripped sump thread :(
« on: 19 August 2007, 09:24:27 »
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The helicoil is quite a hard steel, AFAIK the sump is aluminium
But it can never be stronger than weakest point - in this case the helicoil against the sump?

94488
General Discussion Area / Re: Stripped sump thread :(
« on: 19 August 2007, 08:59:14 »
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You cant re-tap reliably.....by stripping the threads, the extra metal required to get a good tap has been removed, you can only go over size.

And over size isn't as good and as strong as a helicoil.
Yes, I was referring to drilling and retapping to a larger size.

As said, don't really understand why helicoil would be stronger that a (oversize) retap.  Not in anyway disagreeing with you, just lack of understanding on my part.

94489
General Discussion Area / Re: Stripped sump thread :(
« on: 19 August 2007, 08:37:21 »
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Why avoid helicoil.....if done correctly, its better than a tapped thread and is much smoother.

Most top race engines have helicoiled everything!
I don't have much understanding of such things, but if you have room to retap, isn't that a better fix?

94490
General Discussion Area / Re: Stripped sump thread :(
« on: 18 August 2007, 23:27:17 »
On old tractor engine, I retapped and put bigger sump bolt in.

94491
General Discussion Area / Re: Tunnie's little temper trantrum
« on: 19 August 2007, 13:47:52 »
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It must have been in the morning.....surely your eyes can detect an impending collision with a door.... :o
pmsl - you sod, just spilt tea everywhere....

94492
General Discussion Area / Re: Tunnie's little temper trantrum
« on: 19 August 2007, 09:04:20 »
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Went to pick Tunnie up yesterday morning, arrived at his house to find Tunnie, Father Tunnie and Mother Tunnie holding up on of the garage doors  :-?

Turns out, reading between the lines, Tunnie lost his rag and ripped it off its runners  :o


Didn't think he was strong enough, so no more 3 shredded wheat for him again!

Tut Tut.........you did'nt pick him up to early did you ::)
It was in the morning ;)

94493
General Discussion Area / Tunnie's little temper trantrum
« on: 19 August 2007, 08:43:12 »
Went to pick Tunnie up yesterday morning, arrived at his house to find Tunnie, Father Tunnie and Mother Tunnie holding up on of the garage doors  :-?

Turns out, reading between the lines, Tunnie lost his rag and ripped it off its runners  :o


Didn't think he was strong enough, so no more 3 shredded wheat for him again!

94494
General Discussion Area / Re: big thanks to LFF64
« on: 19 August 2007, 13:45:43 »
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Ow.....there proper 110V working lights then....very nice!
Yes, the lucky sod has gained some very nice 110v work lighting....   ....I'm going to start using his garage ;)

94495
General Discussion Area / Re: Is there a more difficult Job
« on: 10 August 2007, 18:31:16 »
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bloody `ell  Shocked Shocked Shocked Sad its another 18 pair of hands your gonna need then..... cry

'kin good job you've got a rugby club around the corner, TB!  :y

.. or are you just swapping the heads over? :-/

Kevin
Entire engine.

94496
General Discussion Area / Re: Is there a more difficult Job
« on: 10 August 2007, 15:27:40 »
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Than removal of a Vectra V6 Radiator  :o :o

2 of us, 5 hours work, hardly any breaks, and TIS on laptop .....and the air was still blue  :-X

Given up for today - the radiator is out....as is fan, air con radiator and fans hanging by a thread...

Oh and to get that far we have removed inner wing liners, front bumper, front grill, front crossmember..... and god knows how many connectors...im really worried about putting it back together...

Beer time, and also time to nurse my numerous cuts, space is of a premium in that engine bay :-/
I'll let you know tomorrow if swapping a diesel engine is a harder job ::)


I presume you have a hoist as thats one heavy heavy lump  :o
Errr, uhhmmm, errrr, next question ;)

94497
General Discussion Area / Re: Is there a more difficult Job
« on: 10 August 2007, 15:14:24 »
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Than removal of a Vectra V6 Radiator  :o :o

2 of us, 5 hours work, hardly any breaks, and TIS on laptop .....and the air was still blue  :-X

Given up for today - the radiator is out....as is fan, air con radiator and fans hanging by a thread...

Oh and to get that far we have removed inner wing liners, front bumper, front grill, front crossmember..... and god knows how many connectors...im really worried about putting it back together...

Beer time, and also time to nurse my numerous cuts, space is of a premium in that engine bay :-/
I'll let you know tomorrow if swapping a diesel engine is a harder job ::)

94498
General Discussion Area / Re: You Guys Can Really Chat!!
« on: 19 August 2007, 08:35:02 »
Wasn't me - else I'd have a high post count ::)

94499
General Discussion Area / Re: BREATHERS CLEANED
« on: 18 August 2007, 23:40:59 »
Top job :y

94500
General Discussion Area / Re: Tech 2 at the Wales Meet?
« on: 18 August 2007, 23:39:15 »
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Just making sure so I know how much pocket money i need to bring ;D

I could do with the Gearbox upgrade :y
I suspect one of us will bring one.

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