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esprit s2

Exhaust manifold

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On removing my old exhaust system from the manifold one of the studs sheared off. Does this mean the manifold is now kaput or can I put in new studs?

The hole on the left had a nut and bolt through it and the other two fixings are studs. Normal?

post-4350-0-16540000-1320429575.jpg

Edited by esprit s2

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Paul plenty of penetrating fluid then as Steve says undo stud and retap the thread before fitting new bolts, if you have to drill out re tap one size up, but you may have to drill out exhaust flange holes slightly larger to acomodate larger bolts.

Regards

Mike

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Hi,my eclat did the same, drill out and retap next size up can be done in Situ.

John

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Decided to buy a new manifold but am unsure where to buy one from. SJ have one at £401.82 (plus VAT), SWLC at £330 (on ebay) and Lotus Bits at £250! Are they all the same?

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The Lotus Bits one is likely to be just a good quality used one from a car they've stripped (I got one recently for my S2 Esprit). Can't comment on the others...

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I think I have a good second hand one, if you are interested I will dig it out and take some photos for you, I would be after a lot less than a new one for it. I'm not a million miles from essex near Luton in Beds

Regards Dan

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Paul

Dan is your man for a replacement one, and buying bits from him helps his Racing Eclat to continue gracing the tracks.

However it is very easy to get the stud out and retap the thread with manifold insitue, I had to do it on one of mine on the Elite, and have done same or similar on many cars in past.

Regards

Mike

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Dan I would be interested if you do have one, PM me some pics and let me know how much you want.

Mike - thanks for the advice, I may try and repair my one and keep it as a spare.

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Hi Paul, I have located the manifold, and have taken some photos but the files seem to large to upload, do you have a direct email I can send them to? The manifold has the standard surface rust but other than that is in very good condition with good threads etc. I am looking for £100 for it, it is a spare manifold that I no longer require due to using a tubular manifold on the race car.If you want to chat about it |I can be contacted on 07710176066

Regards Dan

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Have sent you a text Dan, if you could send the pics to my email that'll be great.

Got it off this evening - excuse my lack of correct naming of components but should the studs all be in the block or be attached the manifold?

post-4350-0-45397500-1325790904.jpg

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Hi Paul, I've got your text and have just sent you an email with some pics, re the studs, they should be in the head, but it's not uncommon for them to come out of the head when you remove the nuts whilst removing the manifold. This should not be a problem so long as they do not strip the thread in the head when they come out, although if this happens it should be possible to carefully helicoil the head. If it were me, looking at the mating surface on the head for the manifold, I would remove the rest of the studs to allow the mating face to be carefully cleaned When you reinstall the studs into the head before fitting the manifold apply some studloc to the threads.

Regards Dan

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two of my studs sheared when I took my down pipe off to remove the engine, seems some kind previous owner used studs made of some kind of very hard material that wouldnt weld, nor could i drill it. It took a recommended engine machine shop over an hour to drill out and re tap it for me. To add insult to injury, all of the replacement head to manifold studs, supplied by a Lotus specialist (nameless) were too long and had to be cut down, also the new nuts they supplied were a tad on the large side and fouled the manifold. It took ages to fit, thank god the endine was out of the car!

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3 questions:

1. Should I use threadlock on the exhaust manifold studs that go in to the block?

2. Got manifold gaskets from SJ, should I use gasket sealant or not?

3. Are the studs M8 size?

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1/ I do not see it doing any harm, but i'm not sure if it will do anything due to the heat

2/ I usually use a smear of exhaust jointing compound on the manifold gasket joints

3/ from memory they are M8

Regards Dan

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