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V8 Engine knock when warm after rebuild

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Hello I am new to this and bought the car of my dreams a 1999 Esprit V8 Twin Turbo in June 2014.

Its now the end of November and im at my witts end.

First it required a new clutch which i got done, then i had an overheating problem which after changing thermostat did not fix problem, then coolant found in oil, So now i have gone ahead with a complete engine rebuild, heads sent away and checked out, new pistons,bearings, gaskets,hoses etc.

Completely rebuild and put back together and ran beautifully for about an hour then started to overheat again and now the engine has developed a knock when warm not when cold,

I have spent a small fortune on it and now my dream has turned into a nightmare.

Any suggestions please this has everyone stumped.

Thanks

 

Wayne 

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One of the pistons has 'picked up' (partially seized) and is now running excessive clearance...   On the other hand it could be something trivial.   Can you pinpoint the source with a stethoscope?

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as you're in Canada  -why not contact Mark T.C.  in medicine head  ..he can have a look (and lent a eear)

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I'd second a call to Mark TC, he's worked on a few and in the middle of an epic V8 build.

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Wayne, the overheating could be caused if your radiator is blocked which is usually by the cooling fins collapsing and restrict the air from passing through it to carry out the cooling.

A new or reconditioned radiator would then be required.

Regards

Will

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Who rebuilt the motor?  They should have some responsibility in resolving the problem, are they 918 engine experienced and did they have the Lotus engine special tool(s) set?  Contacting Mark is probably the best idea.  Who are the people who are stumped? Engine knocks are not difficult to identify the source. If only occurs when warm probably related to low oil pressure, but can't tell remotely.

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Hello I am new to this and bought the car of my dreams a 1999 Esprit V8 Twin Turbo in June 2014.

Its now the end of November and im at my witts end.

First it required a new clutch which i got done, then i had an overheating problem which after changing thermostat did not fix problem, then coolant found in oil, So now i have gone ahead with a complete engine rebuild, heads sent away and checked out, new pistons,bearings, gaskets,hoses etc.

Completely rebuild and put back together and ran beautifully for about an hour then started to overheat again and now the engine has developed a knock when warm not when cold,

I have spent a small fortune on it and now my dream has turned into a nightmare.

Any suggestions please this has everyone stumped.

Thanks

 

Wayne 

 

Welcome to TLF Wayne. :welcome:

 

Sorry to hear about what is going on. Hope you get it sorted without too much pain.

 

Duck over to the Introductions section and say hi in there a well. :)

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It turned out the right turbo was shot.

Thanks for your help

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