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Old 02-27-2012, 12:37 AM   #1
AcquaCow
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Default Lower radiator hose touching header...protection options?

I recently discovered this when it started leaking... took the header a good 10K miles to slowly smoulder through the hose...



I replaced it with a trim-to-fit hose from advance auto and beefed that up a bit with a 2nd layer of rubber


I then wrapped it up for a bit more protection:



This is just a road-side fix, as the leak started when I was 200mi from home on a ski trip...best I could do on short notice.

Now that I'm home, I'm wondering what I could do as a more permanent option?

Can the thermostat housing be clocked at all via aftermarket piece to change the angle the hose exits at? Can I wrap it in any fire sheathing from summit racing? eg: http://www.firesleeve.com/intro.html

Thoughts?

Thanks,

-- Dave
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Last edited by AcquaCow; 07-29-2013 at 11:22 AM.
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Old 02-27-2012, 05:55 PM   #2
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No one?
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Old 02-27-2012, 06:26 PM   #3
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Had a 74 camaro where one of the spark plug wires snugged up against the header. It would melt and then spark to it which led to a miss. We heated up the header pipe and beat the crap out of it to misshapen it and give a little clearance. Pretty crude solution. If only you could find a thermostat housing that came out at different angle like you said. Is that an aftermarket header?
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Old 02-27-2012, 06:41 PM   #4
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Either wrap the header in fiberglass around that area, or put some kind of fiberglass sleeve around the tube, like you have already done. Your roadside fix is close to the permanent fix I would do, if I couldn't re-route the hose.
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Old 02-28-2012, 11:51 AM   #5
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Quote:
Originally Posted by Thunderpaw View Post
Had a 74 camaro where one of the spark plug wires snugged up against the header. It would melt and then spark to it which led to a miss. We heated up the header pipe and beat the crap out of it to misshapen it and give a little clearance. Pretty crude solution. If only you could find a thermostat housing that came out at different angle like you said. Is that an aftermarket header?
Yeah, it's an aftermarket TWE header. I'm going to look for aftermarket billet housings that might have a swivel on them or something...

Quote:
Originally Posted by Bacon117 View Post
Either wrap the header in fiberglass around that area, or put some kind of fiberglass sleeve around the tube, like you have already done. Your roadside fix is close to the permanent fix I would do, if I couldn't re-route the hose.
I had the header wrapped, as you can see in the pics... vibration eventually got the best of the wrap and it wore through. That fiberglass gets very brittle as you heat cycle it...eventually it just flakes apart.

I think wrapping it in some of that fire sleeve might mitigate some of that, but i'm not sure.

-- Dave
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Old 02-28-2012, 01:40 PM   #6
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Quote:
Originally Posted by AcquaCow View Post
Yeah, it's an aftermarket TWE header. I'm going to look for aftermarket billet housings that might have a swivel on them or something...


I had the header wrapped, as you can see in the pics... vibration eventually got the best of the wrap and it wore through. That fiberglass gets very brittle as you heat cycle it...eventually it just flakes apart.

I think wrapping it in some of that fire sleeve might mitigate some of that, but i'm not sure.

-- Dave
I see now, looked the hose was touching bare metal in the pic. Best thing is to reroute, or do something that pulls the hose off the header. A heat shield between the header and the hose might work, but you still have vibration issues.

This is going to be tough to get right on the first shot, good luck.
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Old 02-28-2012, 02:58 PM   #7
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get an old soup can and split it and make a sleeve over it??
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Old 02-28-2012, 09:03 PM   #8
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Wrap it with raw bacon, after each trip you have a refreshing snack that provides protection.
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Old 02-28-2012, 09:59 PM   #9
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Replace the rubber with metal.

Cut some tube metal , clamp it in the contact area.
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Old 03-02-2012, 03:55 AM   #10
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When I was kinda into classic cars, alot of people used Cool Flex custom radiator hoses. They're corrugated metal hoses that you can bend to any shape and cut to the length you need so they can pretty much fit any application. Those shiny end covers are just for show and judging by how tight the space looks, you'd be better off with just the rubber ends.

It looks like you have barely enough space that it might work. You would have to make a bend immediately after the housing to clear the header.
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Old 03-06-2012, 07:30 AM   #11
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Look at the orientation of a turbo water pump. You would have to plug some of the extra holes but it rotates the mounting surface of the outlet by 90 degrees. The hose ends up in a similar location but should be slightly forward.
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Old 03-06-2012, 07:32 AM   #12
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Replace it with a piece of braided stainless?
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Old 03-06-2012, 07:33 AM   #13
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Quote:
Originally Posted by Unabomber View Post
Wrap it with raw bacon, after each trip you have a refreshing snack that provides protection.
^Better idea.
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Old 03-06-2012, 06:34 PM   #14
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Quote:
Originally Posted by ciper View Post
Look at the orientation of a turbo water pump. You would have to plug some of the extra holes but it rotates the mounting surface of the outlet by 90 degrees. The hose ends up in a similar location but should be slightly forward.
I looked at that on my STi... I'll have to get both units in-hand to see if they are compatible...

-- Dave
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Old 03-06-2012, 07:50 PM   #15
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They are compatible. You will need the matching neck
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Old 03-06-2012, 09:14 PM   #16
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Maybe I'll swap an STi pump on then when I do my headgaskets this spring

Thanks.
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Old 03-06-2012, 09:19 PM   #17
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If you have the pump in hand already consider trying to drill out the extra ports (return lines for oil cooler and turbo) then tapping them and inserting a bolt.
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Old 07-29-2013, 11:26 AM   #18
AcquaCow
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Bumping for any new knowledge folks may have gained since March.

I'm actually on my stock header right now, as I was troublshooting a misfire issue (turned out to be a plug gap issue, as the pre-gapped plugs for the N/A subies are .044, which is too big. .038-.042 is the spec).

I'm debating fabbing up a metal/fiberglass/metal sandwich and wrapping that around the radiator hose... should keep the heat from transferring through the layers...inner layer is water-cooled anyways, so that should help keep the hose temp down.

Haven't started building it yet though.

-- Dave
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Old 07-29-2013, 11:34 AM   #19
AcquaCow
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I see that swivel thermostat housings exist... but can't seem to find a subaru compatible one...

Found this in another thread:


The left one is from a Tribeca... I don't know what the right one is... but I think it might solve my problem...

Hopefully the OP responds to my PM.

-- Dave

Last edited by AcquaCow; 07-29-2013 at 11:43 AM.
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