So has mine had a thermostat mod or not?

Freelaner · Jan 3, 2013

if you were near me mate i would do it for you but alas travelling to Kent is a big ask

WLJayne · Jan 3, 2013

Freelaner said:
Meanwhile my cooling system is performing as it should but, granted, i will still have hot and cold spots in the system.
this is the only thing that i find mildly alarming

trick to bleeding is.....do it at least 5 times then do it again just to be sure

It's the heat soak post shut down that worries me most - small alloy engine and all that. By the way, what do you get with MPG? Lately I've been getting 30+mpg even with quite alot of urban driving to get out of the city and my BFG tyres

. Could be the EWP has really helped that.

Freelaner · Jan 3, 2013

WLJayne said:
They look sound enough. It should only be 3 hours labor really, isn't that hard to fit. The bleeding can take a while if they do it properly - you will probably need to "burp" small amounts of air from the system for a week or so after. You can do this by carefully slackening the bleed screw on the top heater matrix hose, small bubbles and coolant will come out if there's air left in it.

I seal my big fat mouth round the top of the expansion tank and blow like fook to purge locked air anorl.

another useful mod i fitted was the replacement expansion tank and cap. some smart arse will post the LR number for it

Freelaner · Jan 3, 2013

WLJayne said:
It's the heat soak post shut down that worries me most - small alloy engine and all that. By the way, what do you get with MPG? Lately I've been getting 30+mpg even with quite alot of urban driving to get out of the city and my BFG tyres . Could be the EWP has really helped that.

27-28 mpg combined but we have a lot of hills round here, so yours is doing good

jamesmartin · Jan 3, 2013

WLJayne said:
It's the heat soak post shut down that worries me most - small alloy engine and all that. By the way, what do you get with MPG? Lately I've been getting 30+mpg even with quite alot of urban driving to get out of the city and my BFG tyres . Could be the EWP has really helped that.

why does that worry you so much ,wouldnt have been a big concern of mine

WLJayne · Jan 3, 2013

jamesmartin said:
why does that worry you so much ,wouldnt have been a big concern of mine

Because in some schools of thought the belief is that because it's a light alloy head and block that heat soak can have a cumulative effect on head warpage. K series Elise owners got really badly shafted for this on track days.

It's got something to do with the head being quenched after casting which leaves some chaotic knots of tension in the head, if the head is repeatedly over heated this knots work their way out and warp the head. That's why K series rebuilders say it's better to get a high mileage head and skim it, those knots will have worked themselves out.

I've got no way to prove any of that but the logic seems sound to me.

WLJayne · Jan 3, 2013

Freelaner said:
27-28 mpg combined but we have a lot of hills round here, so yours is doing good

My MPG is still **** if I only drive around town, 20mpg or so I reckon. At least I can take the missus' 1.2 Ibiza for town errands now, save some dosh.

Cooter · Jan 3, 2013

Freelaner said:
by strange coincidence (we aint had a question on this for a while) i have just this very night explained this very fitment to another noobie.

search button above

Tell you what, without wanting to be struck down by Landyzone God lightening that search button is about as useful as a £7 note!!!

Freelaner · Jan 3, 2013

WLJayne said:
My MPG is still **** if I only drive around town, 20mpg or so I reckon. At least I can take the missus' 1.2 Ibiza for town errands now, save some dosh.

oh mines constant and improves markedly on a run to 35+

i have changed everything on the ignition side so it's running tip top

got the three pronged tipped sparkplugs wiv iridium in 'em too, so all that makes a difference

Freelaner · Jan 3, 2013

Cooter said:
Tell you what, without wanting to be struck down by Landyzone God lightening that search button is about as useful as a £7 note!!!

you're not using the one that says google in it are you?

kurtjohnson10 · Jan 3, 2013

Definitely worth getting the mod done a.s.ap

Freelaner · Jan 3, 2013

jamesmartin said:
why does that worry you so much ,wouldnt have been a big concern of mine

i'm not so sure about it either but from my research it is an accepted cause of hgf in the k-series

Freelaner · Jan 3, 2013

kurtjohnson10 said:
Definitely worth getting the mod done a.s.ap

i've not regretted it

Cooter · Jan 3, 2013

Well Rimmerbros seems the way to go for the part then to off to persuade a decent mechanic to do the deed, hopefully for not much more than £250 all in. What do you lot think?

jamesmartin · Jan 3, 2013

WLJayne said:
Because in some schools of thought the belief is that because it's a light alloy head and block that heat soak can have a cumulative effect on head warpage. K series Elise owners got really badly shafted for this on track days.

It's got something to do with the head being quenched after casting which leaves some chaotic knots of tension in the head, if the head is repeatedly over heated this knots work their way out and warp the head. That's why K series rebuilders say it's better to get a high mileage head and skim it, those knots will have worked themselves out.

I've got no way to prove any of that but the logic seems sound to me.

any head or casting has tension due to the way its made ,outer cools quicker than inside ,its more noticeable with ali but it will move if overheated and is more liable to move again,you allways take a risk skimming and reusing an ali head ,skimming an old flat head that hasnt been overheated would be better but new better still, i wouldnt have thought in normal driving heat soak was an issue ,but if liners,cooling system etc are perfect there is still a risk using a skimmed head

WLJayne · Jan 3, 2013

Cooter said:
Well Rimmerbros seems the way to go for the part then to off to persuade a decent mechanic to do the deed, hopefully for not much more than £250 all in. What do you lot think?

God for £250 I'd expect a free blowjob, and biscuits for me dog!

WLJayne · Jan 3, 2013

jamesmartin said:
any head or casting has tension due to the way its made ,outer cools quicker than inside ,its more noticeable with ali but it will move if overheated and is more liable to move again,you allways take a risk skimming and reusing an ali head ,skimming an old flat head that hasnt been overheated would be better but new better still, i wouldnt have thought in normal driving heat soak was an issue ,but if liners,cooling system etc are perfect there is still a risk using a skimmed head

Thought that was why you get a shim in the MLS kit?

Freelaner · Jan 3, 2013

WLJayne said:
God for £250 I'd expect a free blowjob, and biscuits for me dog!

a bj for the dog and biscuits for you....you mean

Freelaner · Jan 3, 2013

jamesmartin said:
any head or casting has tension due to the way its made ,outer cools quicker than inside ,its more noticeable with ali but it will move if overheated and is more liable to move again,you allways take a risk skimming and reusing an ali head ,skimming an old flat head that hasnt been overheated would be better but new better still, i wouldnt have thought in normal driving heat soak was an issue ,but if liners,cooling system etc are perfect there is still a risk using a skimmed head

LR specified 0.3mm as a max for the skim depth due to an annealed layer on the casting, is this true JM?

Cooter · Jan 3, 2013

WLJayne said:
God for £250 I'd expect a free blowjob, and biscuits for me dog!

I'm thinking £60 for the part and a good couple of expensive hours messing about. Don't forget I'm down south, you pay for quality!

So has mine had a thermostat mod or not?

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