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Today at Atelier Kaz - Private NSX Enthusiast, ex-Honda R&D engineer with F1, Indy/CART background

Brake OH, Cooling Sys, etc 13

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Glad the server is back up running now.

I was about to post the following blog on Saturday but suddenly, the server stopped responding so lost most of my writing and photo link….
Any way, here we go.....





I'm used to working in this cold weather condition but even with the help of heater gun, my finger got too tired dealing with the stiff EPDM rubber coolant hoses so decided to stop for the day and update the blog. (this was Saturday)

Looks like I'll be servicing this NSX tomorrow (Sunday) as well…

















With high humidity, no chance of painting the booster cover but at least, removed as much rust as possible and treated it to keep healthy condition for a long time.

Created good smooth surface where the master cyl gasket sits.

Very important for creating good vacuum pressure.
















Applied vacuum pressure and measured the pushrod clearance.


Once again, the OEM master cyl was within the spec and always all of them are very close to each others.

Whereas the aftermarket one that the other owner brought for his NSX, I already told him that it was out of spec by 0.17 – 0.20mm so that without adjusting the clearance, I won't be able to install it.
So, agreed with him to use the OEM one instead.


















No such drama with this NSX as we are going to install OEM one.

As always, please bench bleed the new brake master cyl before the installation.

Saves your time and fluid massively.

















1st round of pressure bleeding completed followed by the pressure leak check.

I'll carry out the 2nd round later but already getting solid pedal feeling.
























Just keep removing the old coolant hoses.

Draining remaining coolant from the Eng block.


















As reported earlier, old trace (completely dry) of coolant spillage found under the header tank.

It was dry when this NSX arrived at my place so it was done long time ago.

Probably someone left some air in the system and let it bleed by keep running the engine until it escapes together with the coolant through the overflow tube.

I'll be using vacuum fill and bleed the air in 3 rounds to prevent such thing from happening.

You never know how much and how far the heat spots at the eng block can cause trouble in the long term future so one must minimise such possibility.

















So glad that we decided to replace the coolant hoses this time.

As seen on other NSX, the crank shaped coolant hose at the centre floor channel was already showing the broken internal fibre material that it was very soft and would burst soon.






















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