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[GastronomicKleptomaniac]

What's the best way to deal? Previous garage has blatantly overtightened, as it felt iffy coming out, and sure enough, it brought a load of swarf with it. Can it be helicoiled, or tapped with a slightly larger bolt? (and what size would be sensible?)... Or is it easier to get a second hand inlet manifold?

Are manifolds different between engines? Its a 1995 3.0, short plenum.

[Andy B]

.... Can it be helicoiled,  ....

Yes. Though I'd use a Timesert http://www.omegaowners.com/forum/index.php?topic=90513.0 because they're better than Helicoils IMHO and  I have a set in my garage. 

[GastronomicKleptomaniac]

.... Can it be helicoiled,  ....

Yes. Though I'd use a Timesert http://www.omegaowners.com/forum/index.php?topic=90513.0 because they're better than Helicoils IMHO and  I have a set in my garage. 

Did they use them on the multirams?

Ta chap, will have a look!

[05omegav6]

3.0/2.6/3.2 inlets all the same

[biggriffin]

Can you run the thread with a tap ?
If yes,sorted, if no re-drill@tap to nxt size so m6 to m8,

[Nick W]

If any of the thread is still good you could threadlock some appropriate studding in place, and use a nut.

[Shackeng]

What's the best way to deal? Previous garage has blatantly overtightened, as it felt iffy coming out, and sure enough, it brought a load of swarf with it. Can it be helicoiled, or tapped with a slightly larger bolt? (and what size would be sensible?)... Or is it easier to get a second hand inlet manifold?

Are manifolds different between engines? Its a 1995 3.0, short plenum.

....and why don't we like garages?

[biggriffin]

What's the best way to deal? Previous garage has blatantly overtightened, as it felt iffy coming out, and sure enough, it brought a load of swarf with it. Can it be helicoiled, or tapped with a slightly larger bolt? (and what size would be sensible?)... Or is it easier to get a second hand inlet manifold?

Are manifolds different between engines? Its a 1995 3.0, short plenum.

....and why don't we like garages?

Because were all tight with us brass.

[GastronomicKleptomaniac]

3.0/2.6/3.2 inlets all the same

Sweet deal. It is the inlet manifold that the plenum bolts onto, isn't it? I haven't got the car here, MrsGK has taken the MV6, and the ex plod is currently inaccessible without some climbing equipment, so I can't double check myself

Can you run the thread with a tap ?
If yes,sorted, if no re-drill@tap to nxt size so m6 to m8,

Duly noted - are the originals M6, or was that just an example?

If any of the thread is still good you could threadlock some appropriate studding in place, and use a nut.

Only about 8-10mm thread in total isn't there? I was considering a longer piece of threaded bar with nut + washer on each end, but have no idea if thats viable? Is there enough lower access?

Could the resultant lack of clamping force result in a shitty idle? Mr Mog and I tried leaning on I with it running and it seemed to make no difference... But its one of those things I'd like to fix while we are there.

[Andy H]

Can you run the thread with a tap ?
If yes,sorted, if no re-drill@tap to nxt size so m6 to m8,

Duly noted - are the originals M6, or was that just an example?

They are bigger than M6 - I am 99% certain that the are M8.

If you start messing about with larger diameter threads the you will need drill a larger clearance hole through the manifold - if you go for stud and nut then you won't get a spanner on the nut as it won't fit in the recess in the plenum.

Fitting a thread insert would be quicker and easier.

[GastronomicKleptomaniac]

Can you run the thread with a tap ?
If yes,sorted, if no re-drill@tap to nxt size so m6 to m8,

Duly noted - are the originals M6, or was that just an example?

They are bigger than M6 - I am 99% certain that the are M8.

If you start messing about with larger diameter threads the you will need drill a larger clearance hole through the manifold - if you go for stud and nut then you won't get a spanner on the nut as it won't fit in the recess in the plenum.

Fitting a thread insert would be quicker and easier.

Appreciate that! Thank you dude!

[Andy H]

Machine mart sell Helicoil kits https://www.machinemart.co.uk/shop/range/details/thread-repair-kits for £18

Timesert kits appear to cost about £45

[Andy B]

Machine mart sell Helicoil kits https://www.machinemart.co.uk/shop/range/details/thread-repair-kits for £18

Timesert kits appear to cost about £45

that's cos they're more than twice as good 

[Andy H]

Machine mart sell Helicoil kits https://www.machinemart.co.uk/shop/range/details/thread-repair-kits for £18

Timesert kits appear to cost about £45

that's cos they're more than twice as good 

Not arguing - just pointing out what is available.

Timeserts are bigger and stronger but if you just need to do a single insert then a Helicoil is far stronger than it needs to be to hold down one corner of the inlet plenum.

The key with a Helicoil is that it needs to be screwed in and then wound back to get the coil to expand into the thread in the parent metal. Most problems with Helicoils falling out are probably due them not being properly installed. Timeserts are likely to be more user friendly

[Andy B]

...
....
Not arguing - just pointing out what is available.

Timeserts are bigger and stronger but if you just need to do a single insert then a Helicoil is far stronger than it needs to be to hold down one corner of the inlet plenum.

The key with a Helicoil is that it needs to be screwed in and then wound back to get the coil to expand into the thread in the parent metal. Most problems with Helicoils falling out are probably due them not being properly installed. Timeserts are likely to be more user friendly

I wouldn't say that a Timesert is particularly bigger than a Helicoil, but I do agree with your general comments ...... and it's always so much better if you can 'borrow' stuff from work or receive a kit as a 'redundancy payment'  from a previous employment