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1975 Lotus Elite renovation


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Engine autopsy complete, number 4 piston and liner welded together, had to remove the piston and liner to free them from each other. Took a large hammer and bingo piston released, ordered a secondhand

Thanks for the advice. Spark plugs came out easily and I have put some Redex and light oil down the plug holes, I wait and see!

Sorry for the radio Silence! The car has Stalled some what. I bought a couple of Mini Mk1's and have just finished a complete restoration of the 1962 one. I am thinking of selling, would anyone be int

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Just a quick update, engine has been cleaned and cleaned, have still not been able to turn it over. I decided to have a closer look inside, cams off, cylinder head off and the pictures show why the engine does not turn. Looks like the car has driven 67,000 miles a bit rich. Time to get the angle grinder out.

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As said by Mike, No angle grinder lol.

Take your time and keep spraying WD40 on the carbon build up. Ithe should slowly loosen it up. 

Use a small brass bristle brush that is less harsh than a wire brush. 

You could also try and burn it off ? Seems to work with folks cleaning out modern day inlet manifolds on diesels than run erv valve that clogs up with the same carbon deposits. 

Make sure you lock down the cylinder liners also before even trying to turnot the engine over, As if any engine will have the liner seal disturned it will be this one if the engine will not turn the pistons will pull the liners out ! 

Take your time and progress slowly, most of the old lotus engines are salvagable given some tlc.

good luck and keep us posted. 

Used running lumps are around the 700 to 900 mark minus carbs so bare this in mind. 

If the bores look ok though I think this one is well worth saving, seen plenty worse :)

A

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Thanks for the replies, what's the best way to lock down the liners if you don't have a special tool? It is an early matching engine numbered car 9727, so engine change is not an option. If the engine is not repairable the the car will have to be sold for spares.

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Does that mean you would rather see the demise of a car just for the sake of a broken engine?

New pistons and liners are viable options so I can't see you needing a replacement engine if you want to repair. :) 

It's getting there......

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You can use a decent thickness off alloy bar etc, just measure, drill two holes so you can slide it down the block to head studs from one side to the other. 

You will need to make four , :thumbup:

As TAR says do not part the car out just because of the engine numbers, numbers matching is not such a big thing regarding resale imo.

Worse case scenario would be another used lump or maybe even an interesting engine conversion can work out very cheap on the front engined cars  ! 

Or sell the car as a complete project as this will save the car, plenty of folks have a lot of love for them :thumbup:

I still hold out hope for you engine been fine though :)

Just noticed in the picture the valve is missing a little bit of the edge ? Check the bore to see if the damage is visible or maybe that piston in thathe cylinder has collected it in the compression or oil control rings ! 

You could be lucky and it was thrown out straiget out the manifold. SEARCH for that bit ! 

A

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As has been said all bits on the engine can be replaced... All mine were! This gets expensive. It really depends why you are doing the work.

I brought mine to restore and matching numbers were not a big deal (you would have noticed that from my restoration thread!) since I plan to keep the car indefinitely if at all possible. I did think about an engine conversion but my mechanical skills would have limited the success of this a second hand engine would give you a working engine but for how long?

Get the engine out, enjoy yourself rebuilding it, get it back in the car and start it. It's a vital part of your restoration.

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No unfortunately not, the oil strainer was completely blocked with mastic, paint and all sorts of stuff. I think the crankshaft has seized. The pistons do not move, I am waiting for a tool to get the crankshaft pulley off. Then I can get the crankshaft and Pistons out. Then I can assess the damage.

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Practical classics are doing a regular peice they call engine autopsy where they take an engine, strip it down and explain why the engine was important. In last month's issue they were seeking interesting engines that they could strip and return parts... Might save you a job... I have the email if you want it

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Thanks but the engine is nearly completely stripped already, I will pull out the crankshaft and Pistons tomorrow and hope that it is not terminal. Hopefully when the engine was starved of oil the crankshaft just stopped and not caused to much damage. Wishful thinking but it is all I have at the moment.

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Very common problem that sadly has taken place over the years on many engine. !  Silicone engine gasket sealant not been used correctly !  

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5 hours ago, silverfrost said:

Very common problem that sadly has taken place over the years on many engine. !  Silicone engine gasket sealant not been used correctly !  

Hate the stuff. Once bought a rebuilt engine, checked it over before fitting and found all this crap in cam box's, then removed the sump, same. Had to rebuild engine again before I could fit it. Some people seem to think the more Silicone, the better he seal. WRONG.

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Engine autopsy complete, number 4 piston and liner welded together, had to remove the piston and liner to free them from each other. Took a large hammer and bingo piston released, ordered a secondhand piston and liner (£70 all in including rings) from SJS. Ordered rebuild gaskets for top and bottom of engine, new oil strainer filter and a few other bits. Total rebuild should cost should be under £350. Another Elite on it's way to a new life....

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Awesome news Steve 

They can always be saved just comes down to if it is cost effective.

Sounds like you did the right thing, Will keep my fingers crossed for you and look forward to the post when your engine is running ! 

Well saved lol

A

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No Dan I didn't, there was so much crap between the piston and liner that I would have been differcult to spot. I had to hit the liner on the side many times with a hammer to get the piston out

i has accured to me after the strip down that you have to have lotus special tools to take things like the crankshaft pulley snouts off, I waited four days and paid £60 for the tool and have used it once for five minutes. Maybe we can set up a little rent "a lotus tool" thing on the forum. I would have been delighted if I could have rented the tool for £15.

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It does happen regarding tools Steve, 

Normally to be honest , someone cops the cost of the original outlay and then just lends it out lol. 

Plenty of custom made tools knocking about on the forum for certain jobs. 

Could be worse specialist tools are in the hundreds of pounds bracket for certain jobs on different brand engines.

I pity the folks trying to earn a living in the trade today with all the added equipment you need for the new tech and electronic wizardy !

 

A

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