300tdi coolant bleed points

alexc2701 · Apr 28, 2019

Hi guys

Just about to put my 300tdi coolant system back together, had all new pipes new rad and new inter cooler. Was thinking of tapping the top of rad m6 for a bleed point when filling? Since I’m using a tdci bulkhead my heater supply pipes are quite high up too so I brought some brass 90 deg angles. I was also thinking of tapping these if they look thick enough when they arrive for a high bleed point similar to the plastic tdci ones.

Basically wondered if anyone knew if the top of rad thickness would be enough to tap without threading it or if it would need a brazed nut instead?

Cheers

neilly · Apr 28, 2019

alexc2701 said:
inter cooler m6 for a bleed point when filling?

You putting coolant in your intercooler??

Cheers

alexc2701 · Apr 28, 2019

neilly said:
You putting coolant in your intercooler??

Cheers

I mean for the oil side as well as coolant side

neilly · Apr 28, 2019

alexc2701 said:
I mean for the oil side as well as coolant side

So why do you need to bleed your intercooler?

300tdi rad has a bleed fitting on the top of it as well as one on the thermostat housing.

Cheers

alexc2701 · Apr 28, 2019

neilly said:
So why do you need to bleed your intercooler?

300tdi rad has a bleed fitting on the top of it as well as one on the thermostat housing.

Cheers

I don’t I just explained it badly!
The alloy one I got has the bleed pipe fitting but I’ve been told they’re hard to get bled up so this seemed like an easy solution if the metal is thick enough to tap

neilly · Apr 28, 2019

Well if you follow the destrutions not sure why you should have major issues bleeding it.

I would recommend changing the plastic bleed points for brass ones, in fact you can get houshold radiator fitting that have small bleed points on them .

Cheers

alexc2701 · Apr 28, 2019

neilly said:
Well if you follow the destrutions not sure why you should have major issues bleeding it.

I would recommend changing the plastic bleed points for brass ones, in fact you can get houshold radiator fitting that have small bleed points on them .

Cheers

Got brass replacement for the thermostat housing but
Couldn’t find any 16mm angles with a bleed. So got the brass ones hoping be able to tap
Does the rad bleed up relatively easily through thermostat then? If so I won’t bother tapping it, just thought if it is a pig mayaswel fix it now
Top heater pipe prob be awkward since ends up virtually same height as the header

neilly · Apr 28, 2019

alexc2701 said:
Got brass replacement for the thermostat housing but
Couldn’t find any 16mm angles with a bleed. So got the brass ones hoping be able to tap
Does the rad bleed up relatively easily through thermostat then? If so I won’t bother tapping it, just thought if it is a pig mayaswel fix it now

OK, I take it you are not using a std 300rad?

Cheers

alexc2701 · Apr 28, 2019

neilly said:
OK, I take it you are not using a std 300rad?

Cheers

Brought this

neilly · Apr 28, 2019

alexc2701 said:
Brought this

Take it out of the box and look at it. Have you read the manual for bleeding the system?

Cheers

alexc2701 · Apr 28, 2019

neilly said:
Take it out of the box and look at it. Have you read the manual for bleeding the system?

Cheers

Yeah it keeps quoting a second bleed plug but my old one didn’t have one
Haven’t had chance to check the new one yet don’t get delivered to mine

kevstar · Apr 28, 2019

alexc2701 said:
Brought this

Allisport one ?? they have a bleed nut on the top in line with the top rad hose..

alexc2701 · Apr 28, 2019

kevstar said:
Allisport one ?? they have a bleed nut on the top in line with the top rad hose..View attachment 176677

Not allisport
If it does though be a pleasant surprise! I just assumed be same as old one which didn’t have!

neilly · Apr 28, 2019

alexc2701 said:
Not allisport
If it does though be a pleasant surprise! I just assumed be same as old one which didn’t have!

Well I am glad I wrote what I did in post#4 then........................

Cheers

alexc2701 · Apr 28, 2019

neilly said:
Well I am glad I wrote what I did in post#4 then........................

Cheers

Just trying to be prepared. Not all got easy access and space to do things seemed a simple question to ask if thick enough to tap.

kevstar · Apr 28, 2019

alexc2701 said:
Not allisport
If it does though be a pleasant surprise! I just assumed be same as old one which didn’t have!

Where did you buy the rad from, Ive just put all mine back together after converting it from auto to manual
I put a hose onto the metal pipe on the rocker cover to fill the heater then reconnected the pipe & left the
plugs out & expansion tank cap off then started the engine once the water started to flow out I put the plugs
in & it worked first time

alexc2701 · Apr 28, 2019

kevstar said:
Where did you buy the rad from, Ive just put all mine back together after converting it from auto to manual
I put a hose onto the metal pipe on the rocker cover to fill the heater then reconnected the pipe & left the
plugs out & expansion tank cap off then started the engine once the water started to flow out I put the plugs
in & it worked first time

Uk performance

That’s a good idea, I might try that with mine with the heater being so high

Thanks for your help. Your setup looks fab too!
I was tempted by one of those alloy header tanks too since my plastic one was leaking but they were quite expensive! Wasn’t sure if it would fit the same with all the bits that have been moved

alexc2701 · Apr 28, 2019

What have you done for fixing your rad frame? Mine was missing all the fixings looks like it was just floating originally lol

300tdi coolant bleed points

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