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Recon Engines

Posted: Fri Jun 19, 2009 9:54 am
by whenisayjump
I've been looking at the minor specialists... and they seem to do 'recon' engines.

They're about £600 - £800... which seems reasonable. How much do they cost to be fitted?

Also, how does that sort of price compare with having a garage recon the engine for you?

Thank You

:)

Posted: Fri Jun 19, 2009 2:18 pm
by bmcecosse
A crank regrind and new bearings ~ £80/90. Rebore and new pistons -~ £150/£200 depending on piston costs. Add ~£60 for new oil pump/timing gears and chain and gaskets. Cylinder head - depends if going 'unleaded' or not - not essential, but many put it on as standard otherwise new exhaust valves, new guides and recut seats so ~ £40/£150 depending on work done. Labour to rebuid the engine extra of course - or easy DIY. Engine swap - someone who knows what they are doing -can do it in a very few hours. Budget for a new clutch plate and release bearing - and perhaps new engine mounts - and oil + filter of course.

Posted: Fri Jun 19, 2009 3:06 pm
by dalebrignall
it all depends on the labour time involved,mine worked out about £1100 all in.that included a clutch as well.

Posted: Fri Jun 19, 2009 3:11 pm
by whenisayjump
Ooo. Thanks for the info... does the engine just get 'loose' ?

Like, over time, will the cylinders get bigger than they're supposed to be ?

I am clutching at a very vague understanding of engines.

James

Posted: Fri Jun 19, 2009 3:54 pm
by bmcecosse
Yes - the bores wear away - and the piston rings wear too, and lose some of their 'springiness' - allowing gases to pass by. The crankshaft and it's bearing can wear too - although if regular oil and filter changes are performed, and the engine is NEVER allowed to run short of oil - they can go on for a very very long time.

Posted: Fri Jun 19, 2009 4:15 pm
by whenisayjump
bmcecosse wrote:Yes - the bores wear away - and the piston rings wear too, and lose some of their 'springiness' - allowing gases to pass by. The crankshaft and it's bearing can wear too - although if regular oil and filter changes are performed, and the engine is NEVER allowed to run short of oil - they can go on for a very very long time.
...and so not all of the vapour is harnessed and there's not as big a bang?

Would petrol go down the exhaust in that case?

James

Posted: Fri Jun 19, 2009 6:37 pm
by LouiseM
it all depends on the labour time involved,mine worked out about £1100 all in
Depends on where you live. Mine has just cost nearer £1,500 but London labour charges are high. Collecting her tomorrow morning :D

Posted: Fri Jun 19, 2009 7:15 pm
by bmcecosse
Wow -£1500 for a Minor engine - overhauled and fitted - goes off for a lie-down!

Posted: Fri Jun 19, 2009 7:30 pm
by LouiseM
I've spent less on complete Minors but at least she is back on the road for the National :D

When are you going for your lie down? You still seem to be posting at an alarming rate :lol: :lol:

Posted: Fri Jun 19, 2009 7:58 pm
by linearaudio
whenisayjump wrote:[...and so not all of the vapour is harnessed and there's not as big a bang?

Would petrol go down the exhaust in that case?

James
Engine would probably cease to run long before that!
There is no such thing as a perfect seal, so fumes blowing past the piston are a fact of life, but really small in proportion to the overall running. Even when an engine is clapped out and breathing like a good-un, the actual gas losses are still pretty small in comparison to the "bang", which, being near to instantaneous, happens before it realises what is going on!

Posted: Fri Jun 19, 2009 8:08 pm
by bmcecosse
Back up again - lie down completed! Don't panic!

Posted: Fri Jun 19, 2009 8:09 pm
by whenisayjump
So what's the problem with it all loosening up then... ?

I sortof understand why you may want a recon engine... but when people talk about the 'crank' and so forth I don't really understand what they are and thus the benefits of renewing them, or indeed what such things manifest themselves as in terms of problems.

Posted: Fri Jun 19, 2009 8:14 pm
by bmcecosse
This 'may' help - i haven't read it though! http://www.howstuffworks.com/engine.htm
It does look quite useful!

Posted: Fri Jun 19, 2009 8:17 pm
by jonathon
Louise, I think Roy should have sedation, must be drinking too much coffee :wink: :D

Posted: Fri Jun 19, 2009 8:18 pm
by bmcecosse
Funny you should say that - just been for re-fill ! i can see a long evening ahead on here!

Posted: Fri Jun 19, 2009 8:45 pm
by LouiseM
Louise, I think Roy should have sedation, must be drinking too much coffee
Just had a top up too. I find it helps to keep me awake when disc brakes are mentioned :wink:

Posted: Fri Jun 19, 2009 9:14 pm
by jonathon
:( :oops: :oops: say no more, I'll get m'coat

Posted: Fri Jun 19, 2009 9:33 pm
by linearaudio
What's that about disc brakes? Have I missed something?
Just been doodling out an idea for 4 leading shoe brakes like the racing bikes had in the good old days before discs. Should really be able to pull the moggy up then :wink:

Posted: Sat Jun 20, 2009 8:30 am
by Kevin
When are you going for your lie down? You still seem to be posting at an alarming rate
And he is on other forums as well :lol:

Posted: Sat Jun 20, 2009 6:23 pm
by Stubee
I'd budget at least £1k to have it supplied and fitted. My recon was about £600 + £200 or so fitting. Then theres the cost of consumables and the clutch bits needed doing anyway. Was thinking of fitting myself but glad I didn't as the first replacement was U/S on fit so it then became the garages responsibility to remove and replace with another unit.