Lotus Elan

Swapping an exhaust manifold and engine out job?

PostPost by: tdskip » Wed Jun 24, 2020 8:44 pm

From what I've been able to read up on I don't think so, but wanted to ask. Just spent an hour wiring brushing my exhaust - which as been welded together to be one complete piece - and want to know what I'm in for should I want or need to swap it out later.

Thanks - and hope it's been a good week for everyone so far.

Stay safe.
SoCal
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PostPost by: steve lyle » Wed Jun 24, 2020 9:39 pm

On my 72 Sprint, I had to support the engine with a floor jack under the oil pan (with a piece of wood between to spread the load), remove both engine mounts, and move the engine to the far right side (drivers view) in order to get the the headers in when I replaced my stock iron manifold. Edd China had to do something similar when he replaced an Elan header on Wheeler Dealers.

So, no, you don't have to pull the engine. It's not THAT bad. :-)
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PostPost by: tdskip » Wed Jun 24, 2020 10:16 pm

Thanks Steve - appreciate the fast response and information as always.
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PostPost by: Chrispy » Thu Jun 25, 2020 2:37 am

Mine needs the engine mount out on that side off. Not too hard.
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PostPost by: tdskip » Thu Jun 25, 2020 4:54 am

Thank Chris.
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PostPost by: RichardHawkins » Thu Jun 25, 2020 8:05 pm

If I remember correctly it was Rohan who advised changing the exhaust studs for bolts, I think he uses socket headed cap screws, to improve clearance, I know this won’t help with removal, but is worth considering to ease re-fitting.

Hope this helps,

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PostPost by: tdskip » Thu Jun 25, 2020 10:18 pm

RichardHawkins wrote:If I remember correctly it was Rohan who advised changing the exhaust studs for bolts, I think he uses socket headed cap screws, to improve clearance, I know this won’t help with removal, but is worth considering to ease re-fitting.

Hope this helps,

Richard Hawkins


Thanks Richard - that is a great tip. Everything is apart now so I have a chance to make little tweaks like that pretty easily now. Great stuff!
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PostPost by: englishmaninwales » Fri Jun 26, 2020 1:03 pm

tdskip wrote:
RichardHawkins wrote:If I remember correctly it was Rohan who advised changing the exhaust studs for bolts, I think he uses socket headed cap screws, to improve clearance, I know this won’t help with removal, but is worth considering to ease re-fitting.

Hope this helps,

Richard Hawkins


Thanks Richard - that is a great tip. Everything is apart now so I have a chance to make little tweaks like that pretty easily now. Great stuff!


I’ve done this, and it does help. However, there are risks, the obvious one being super careful to avoid cross threading and stripping the thread in the head. The other is long term damage to the thread by repeated removal/replacement. Maybe consideration for thread insert on all the exhaust threads next time the cylinder head is off and stripped? Opinions welcome.
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PostPost by: vstibbard » Sat Jun 27, 2020 5:28 am

I've always changed to cap screws, but you must get the thread inserts fitted so best to do it when heads off.
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