Banjo bolt instead of coolant bleed screw?
#16
Drifting
#17
Can this be done? I sure hate all that coolant spilling over the intake manifold gaskets and esp down into that valley where it just sits there. No matter how many rags I stuff in there, it just gets everywhere.
I guess all that's needed is a fitting with shutoff that screws into the coolant neck, replacing the bleed screw? That's a pretty small thread though
I guess all that's needed is a fitting with shutoff that screws into the coolant neck, replacing the bleed screw? That's a pretty small thread though
#19
Rainman
Rennlist Member
Rennlist Member
Thread Starter
youd need a spacer but this one should let you attach a hose to the end.
http://products.jitsie.com/site/en/M...lve-JI6127920/
http://products.jitsie.com/site/en/M...lve-JI6127920/
#20
Drifting
Of course! A brake bleed screw.. brilliant. For providing the insight and finding a good candidate, you get a THANK YOU
What do you mean by spacer? Is that because the threaded part looks a lot longer than the stock part and this spacer would fill in the gap? And M8x1.0 is the correct thread? PET doesn't give the spec (Stock is part no. 931-106-156-00 )
What do you mean by spacer? Is that because the threaded part looks a lot longer than the stock part and this spacer would fill in the gap? And M8x1.0 is the correct thread? PET doesn't give the spec (Stock is part no. 931-106-156-00 )
#21
Rainman
Rennlist Member
Rennlist Member
Thread Starter
exactly, that item is listed as a banjo bolt so presumably it's long enough for a banjo fitting.
if you don't fit a banjo fitting you'll need something else approximately that thickness (big nut, or a metal spacer)
if you don't fit a banjo fitting you'll need something else approximately that thickness (big nut, or a metal spacer)
#22
Burning Brakes
Yes the factory coolant bleed screw is M8x1.0. Summit has 2 brake bleeders in that size; can get a set of 5 standard bleeders for ~$12. Might have to stack 2 M8 crush washers, or find a thicker one as the threads don't go all the way to the nut surface.
#23
Drifting
As an aside, I can't help wonder why Porsche didn't put a proper bleeder there just like the brakes? I mean, they made it possible to put a hose while bleeding brakes... and really, anyone do that? I just let it run down the side and wipe; meanwhile, the coolant neck is such a bad spot to drain!
Unless using a hose can mess up the bleed... I guess you need to ensure you keep it up high; not particularly hard to do
#25
What am I missing here?
How does a brake bleed screw stop the flow of coolant when installed in the gooseneck?
What does it close / seat against?
How does a brake bleed screw stop the flow of coolant when installed in the gooseneck?
What does it close / seat against?
#26
Nordschleife Master
Those hydraulic brake bleed screws are not designed for the purpose intended here, they need a tapered seat to seal against, and is it really such a big problem getting the engine slightly wet with coolant everytime you bleed the system. It does evaporate off the first time you drive it you know and it’s not like you do it more than maybe once a year
#27
Burning Brakes
The traditional approach. 1/4" Male NPT to M8x1 Male 90* adapter connected to 1/4" Female NPT to 1/4" Male NPT Ball Shut off valve. Together can be sourced for around $20
#28
Drifting
+1000, this thread started with creating a constant bleed system that isn’t needed and is ending by adding a hydraulic bleed screw to prevent the engine getting wet when bleeding.
Those hydraulic brake bleed screws are not designed for the purpose intended here, they need a tapered seat to seal against, and is it really such a big problem getting the engine slightly wet with coolant everytime you bleed the system. It does evaporate off the first time you drive it you know and it’s not like you do it more than maybe once a year
I have only had successful bleeds when running the process for a while; last time, it took a looong time for the bubbles to stop--to the point of adding more coolant while bleeding. I began to worry about soaking of the intake gaskets.. them being paper now swimming in hot coolant. Then that pool in the "V" between block & balance shaft housing: yes, it burns off, but it leaves nasty residue.
Sure.. I guess not a big deal.. but how much nicer it would be to have a "clean bleed"! For those of us that don't wrench daily, it would be great for things to be a little neater and easier... like pulling spark plug wires... or distributor cap fastening... or oil fill that's a little *closer*.. or easily-accessible AOS seals... or....... I guess the list is quite long on our beauties
#29
+1000, this thread started with creating a constant bleed system that isn’t needed and is ending by adding a hydraulic bleed screw to prevent the engine getting wet when bleeding.
Those hydraulic brake bleed screws are not designed for the purpose intended here, they need a tapered seat to seal against, and is it really such a big problem getting the engine slightly wet with coolant everytime you bleed the system. It does evaporate off the first time you drive it you know and it’s not like you do it more than maybe once a year
#30
Burning Brakes