Top Hose Air Bleed

Look in here for tips on buying a 'Kit', using Sat Nav, keeping your car in 'good nick' - and more......

Moderator: Contaminated

User avatar
Fury1630
Posts: 5342
Joined: Thu Mar 04, 2010 7:11 am
Location: Camberley
Contact:

Top Hose Air Bleed

Postby Fury1630 » Thu May 10, 2018 4:50 pm

The Fury's never overheated, but the fan comes on almost as soon as it's stationary & one day I was thinking about this while looking under the bonnet, when I realised the "hump" in the top hose where it passes over the rocker arm might have some air in it. I slackened the clamp, there was a hiss, a gurgle, & the level in the reservoir dropped by about a litre.

I looked up the widgets you can buy to let a hose into a coolant pipe & realised I was looking at a £30 - £40 bill by the time the parts got to me.

So as I are an injunear, I thought about this & had the instrument maker at work put a 3mm hole through an M8 bolt (a titanium one as it happens - for corrosion resistance obviously :D ) & turn down the head to 8 1/2mm, then assembled it onto my prototype, then onto the car. I think the photos are pretty self explanatory. I used nylocs & a packer shaped to fit the inside of the pipe on the car. This is then teed into the existing air bleed hose from the rad.

I'm not concerned about the reduction in cross section as the aircraft pipes I used on the car have about twice the cross section of the Ford pipes, so it shouldn't be a problem.

IMG_0608.JPG
IMG_0608.JPG (71.03 KiB) Viewed 14889 times

IMG_0610.JPG
IMG_0610.JPG (59.73 KiB) Viewed 14889 times

IMG_0611.JPG
IMG_0611.JPG (70.01 KiB) Viewed 14889 times

IMG_0613.JPG
IMG_0613.JPG (64.04 KiB) Viewed 14889 times

IMG_0614.JPG
IMG_0614.JPG (117.59 KiB) Viewed 14889 times

User avatar
steve m
Posts: 2891
Joined: Mon May 09, 2011 9:01 pm
Location: Crawley West sussex
Contact:

Re: Top Hose Air Bleed

Postby steve m » Thu May 10, 2018 5:20 pm

This current heat wave seems to of brought out everyones cooling issues :)

I don't think I have one............. but I suppose that's to find out on my next run

My question though, is why add the T piece into the equation, surely your over complicating a very basic flow and return that most engines and rads require, and if theres air in the system, surely a bleed valve would of sufficed or move the hoses about to get a flow with out air ?

However, im not an injaneer, more of a trouble causer,

steve
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at

User avatar
DJ.
Posts: 5991
Joined: Mon May 30, 2011 7:31 pm
Contact:

Re: Top Hose Air Bleed

Postby DJ. » Thu May 10, 2018 6:46 pm

steve m wrote:My question though, is why add the T piece into the equation, surely your over complicating a very basic flow and return that most engines and rads require, and if theres air in the system, surely a bleed valve would of sufficed or move the hoses about to get a flow with out air ?

However, im not an injaneer, more of a trouble causer,

steve


You don't cause much trouble Steve :)

My Seven has a small hose from the top of the radiator like Tony's, and it is quite a good system. When I fill the car with coolant, there is always some air left despite filling it from the highest point, and I find after the first good run the level drops in the expansion tank. A bleed valve helps reduce the air in the system when filling, but Tony's system will always be acting to return any air present back to the expansion tank.

User avatar
Fury1630
Posts: 5342
Joined: Thu Mar 04, 2010 7:11 am
Location: Camberley
Contact:

Re: Top Hose Air Bleed

Postby Fury1630 » Thu May 10, 2018 6:51 pm

There wasn't a cooling issue as such, it didn't overheat, but the gauge did start to creep up as soon as the car stopped & the fan started & stayed on for a long time. I would love to re-route the hose as it's always looked a bit of a mess, but with inboard suspension there isn't rally the space to put it. I could've just bled the air out, but as the radiator bleed hose ran right past there it seemed sensible to use it & never have to remember to bleed it ever again. :D

User avatar
Tony C
Posts: 3060
Joined: Sat Mar 06, 2010 1:42 pm
Location: Horsham
Contact:

Re: Top Hose Air Bleed

Postby Tony C » Thu May 10, 2018 7:08 pm

Tony you should have said, I still have a spare OEM part from Golf that does pretty much the same thing in plastic, imagine how light it is........I'll get my coat :lol:
Tiger Cat E1 - 2008-2009
Tiger R6 - 2009-2014
Austin Healey Sprite - 2014-2018
Fisher Fury Le Mans - 2018-2019

User avatar
Fury1630
Posts: 5342
Joined: Thu Mar 04, 2010 7:11 am
Location: Camberley
Contact:

Re: Top Hose Air Bleed

Postby Fury1630 » Thu May 10, 2018 7:28 pm

Tony C wrote:Tony you should have said, I still have a spare OEM part from Golf that does pretty much the same thing in plastic, imagine how light it is........I'll get my coat :lol:


Oh don't - I'm already fretting that I'm carrying around an extra litre of water - that's another kilogram!! :lol:


Return to “Useful Info - tips, tricks ....”

Who is online

Users browsing this forum: No registered users and 10 guests