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K series coolant mod


Redbullwings

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Does anyone have a copy of the low flying heater mod you can email me or piston here?

I've just changed to silicone hoses and have he classic airlock. I've been through the archive and followed the filling tips but after my second attempt I've still got air in the block. I even pulled the thermostat housing out slightly till fluid came out then shoved it back in sharp ish.

 

I would really love to sort this one without having to resort to my local specialist.

 

Thanks

Doug

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Have you fitted a bleed tee? Getting it fitted at the highest point makes refilling easy. If you do this then you can do your last filling from here so no air lock. (Make sure your heater valve is open too, easy to forget with the nice weather as mine is closed to just blow cool air. Most local owners will be happy to help you if you get stuck

 

Edited by - Roadsport06 on 2 Aug 2014 18:05:14

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I have changed my coolant twice without any problems.

Front jacked up.

Heater valve open.

Remove bolt from top of rad.

Disconnect top hose from heater.

Poor in coolant and smoothly as possible to reduce glugging.

Once satisified the system is full refit heater hose.

Several squeezes of top and bottom rad hoses.

Top up if needed.

Refit bolt.

More squeezes.

Top up if needed.

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I have fitted the t piece and opened the heater, intact I used it as the rad with the fan on to help keep the temp down on my short trip round the block. On my short test run I managed to get another half litre in it but am still about half a litre short.

 

Does a 3mm hole in the thermostat normally sort things out?

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I'm pretty sure it's air in the block as the thermostat isn't kicking in. That coupled with the fact that I'm short on coolant points at an Air lock. Top of rad and heater get hot but bottom rad hose is cold.

 

I'm on holiday this week so Monday would be perfect if you could manage to email the PDF

 

Thanks

 

Doug

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  • 2 weeks later...
Hi all BTTT as I'm having similar problems too. Please could someone blatmail me the thermostat mod info too? Also, although I have bleed tee fitted and want to fill from the top hose by the heater, my radiator is the cheaper plastic top and bottomed crimped jobbie. Would you recommend that I fill via tee with expansion bottle cap off and thermostat out (seeing as there is no rad top filler) or use pressure release valve hole next to thermostat, then quickly jam that on when starting to overflow? It' seems a bit annoying that there isn't a top bolt on the rad.
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I'm with you John. I really don't understand why some people seem to have trouble, and feel the need to add bleed tees, holes in thermostat etc.

 

I must have changed the coolant more than half a dozen times for various reasons over the years, and have never had a problem *confused*

 

Like you say, nose in the air, massage hoses, jobs a good un!

 

The only mod I've ever made to the cooling system is changing the thermostat from 88 to 82 many years ago.

 

It's a bit like the gearbox oil, I've only ever used the usual recommended stuff when changing it in my 6 speed, and it's always been fine. Seems to me, that some people are now finding out that the wonder potion known as Redline MTL, may not be all it's cracked up to be! Sometimes things are better left alone.

 

Oz.

 

Edited by - ozzy on 17 Aug 2014 16:33:07

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