Forced Induction Superchargers | Turbochargers | Intercoolers

Radiator Hose And Downpipe Clearance

Thread Tools
 
Search this Thread
 
Old Dec 23, 2020 | 06:50 PM
  #1  
69gto96z's Avatar
Thread Starter
TECH Fanatic
iTrader: (13)
 
Joined: May 2006
Posts: 1,245
Likes: 15
From: Rockwall, TX
Default Radiator Hose And Downpipe Clearance

How close it too close for downpipe to coolant hose clearance? This is my first turbo build, and it definitely has me spooked. Downpipe is wrapped in DEI titanium, and I wrapped the hose in heat shielding. The hose is rubber/metal ribbed. Thoughts?

Reply
Old Dec 23, 2020 | 06:51 PM
  #2  
Shownomercy's Avatar
Man-Crush Warning
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (1)
 
Joined: Jun 2009
Posts: 3,196
Likes: 129
Default

It's gonna be trouble imo
Reply
Old Dec 24, 2020 | 09:31 AM
  #3  
forcd ind's Avatar
TECH Veteran
15 Year Member
Liked
Loved
Community Favorite
iTrader: (7)
 
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
Default

I have had heater hose pretty close to a manifold, both wrapped, no problem-I would prob throw some wrap on the hose besides the heat shield-is that your 02 sen. at 6 o'clock, they say no further than 3/9 due to moisture.
Reply
Old Dec 24, 2020 | 10:08 AM
  #4  
69gto96z's Avatar
Thread Starter
TECH Fanatic
iTrader: (13)
 
Joined: May 2006
Posts: 1,245
Likes: 15
From: Rockwall, TX
Default

Originally Posted by forcd ind
I have had heater hose pretty close to a manifold, both wrapped, no problem-I would prob throw some wrap on the hose besides the heat shield-is that your 02 sen. at 6 o'clock, they say no further than 3/9 due to moisture.

What kind of wrap would you suggest?

Yeah it is. It’s a Huron T6 kit, the o2 is at 6, but on a angle, so I am hoping moisture collection won’t be a problem there. If it is, I will weld one in at another spot.


Reply
Old Dec 24, 2020 | 10:55 AM
  #5  
Quito195's Avatar
On The Tree
10 Year Member
 
Joined: Jul 2013
Posts: 196
Likes: 55
Default

I ended up hard piping my rad hose for the same reasons.

just another way to skin a cat. Don’t really worry about it that way either lol. Ignore my garbage headed wrap job. I fixed it all I just don’t care enough to take photos these days.
Reply
Old Dec 24, 2020 | 11:11 AM
  #6  
69gto96z's Avatar
Thread Starter
TECH Fanatic
iTrader: (13)
 
Joined: May 2006
Posts: 1,245
Likes: 15
From: Rockwall, TX
Default

Hard piping might be my next stop. I think I can do some trimming on how I fabbed my lower radiator mount, and squeeze another 1/4-3/8” of space there. My biggest concern is I may need to shorten the outlet on the radiator and re flare it somehow. Doing that I could trim the hose more and gain another 1/2”1”. In the picture below, I drew a red line about where it is inside of the hose.



Reply
Old Dec 24, 2020 | 01:28 PM
  #7  
Pro Stock John's Avatar
LS1Tech Co-Founder
20 Year Member
Community Influencer
iTrader: (34)
 
Joined: Nov 2001
Posts: 45,340
Likes: 1,770
From: Chicago, IL
Default

Yeah I'd want to reclock that and/or hard pipe it.
Reply
Old Dec 25, 2020 | 11:51 AM
  #8  
69gto96z's Avatar
Thread Starter
TECH Fanatic
iTrader: (13)
 
Joined: May 2006
Posts: 1,245
Likes: 15
From: Rockwall, TX
Default

How much of a minimum air gap should I be shooting for?
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Dec 25, 2020 | 12:15 PM
  #9  
jordoza's Avatar
TECH Enthusiast
5 Year Member
Photogenic
 
Joined: Dec 2017
Posts: 676
Likes: 72
Default

Why not just get a aluminum 90 and just weld the 90 on the end of the radiator outlet then hook the hose to that. Seems like it would be easier then re-engineering a whole hose or chancing a wrap fix.

Could also clearance the down pipe with a recess to clear the hose. Little heat and a hammer and you'd probably be good and barely hurt overall flow if at all depending on hp level.
Reply
Old Dec 25, 2020 | 12:29 PM
  #10  
69gto96z's Avatar
Thread Starter
TECH Fanatic
iTrader: (13)
 
Joined: May 2006
Posts: 1,245
Likes: 15
From: Rockwall, TX
Default

Originally Posted by jordoza
Why not just get a aluminum 90 and just weld the 90 on the end of the radiator outlet then hook the hose to that. Seems like it would be easier then re-engineering a whole hose or chancing a wrap fix.

Could also clearance the down pipe with a recess to clear the hose. Little heat and a hammer and you'd probably be good and barely hurt overall flow if at all depending on hp level.
That has crossed my mind as well. Anything I can do with minimum welding is first option right now though. I don’t trust my aluminum TIG work for leak free welds, and pulling the radiator will require removal of all hot piping and turbo.
Reply
Old Dec 25, 2020 | 01:06 PM
  #11  
jordoza's Avatar
TECH Enthusiast
5 Year Member
Photogenic
 
Joined: Dec 2017
Posts: 676
Likes: 72
Default

Then I'd just remove that down pipe and modify it if I where you. The dent you would been to make to clear that hose and give you more room wouldn't be insane by any means.
Reply
Old Dec 25, 2020 | 06:26 PM
  #12  
Dragframe's Avatar
9 Second Club
15 Year Member
Liked
Loved
Community Favorite
iTrader: (14)
 
Joined: Oct 2005
Posts: 2,336
Likes: 67
From: wyoming @ 12000 DA...
Default

I have a rubber line laying on my wrapped downpipe. Never had a issue. Plan on building some stainless pipes for it eventually though
Reply
Old Dec 27, 2020 | 11:00 AM
  #13  
V8EATR's Avatar
Staging Lane
 
Joined: Jul 2007
Posts: 71
Likes: 19
Default

My clearance is similar and my radiator hose isn't wrapped, just the dp. Im sure it will be fine, I have never had an issue.
Reply
Old Dec 28, 2020 | 02:01 PM
  #14  
Forcefed86's Avatar
8 Second Club
15 Year Member
Liked
Loved
Community Favorite
iTrader: (4)
 
Joined: May 2011
Posts: 8,485
Likes: 1,029
From: Wichita, KS
Default

Can you buy a 6-12" piece and clamp it in place wher eit passes by the turbo? Something like this? I thought the ID was 1.5? Look up 38mm alum bends on ebay. Tons of options.



Reply
Old Dec 28, 2020 | 08:25 PM
  #15  
beau.'s Avatar
On The Tree
10 Year Member
 
Joined: Oct 2012
Posts: 124
Likes: 18
From: Jefferson, LA
Default

My huron speed v3 ac kit has a similarly routed 4" bumper exit downpipe that I also thought was very close to the same radiator hose. I actually cut a small piece off of the hose on the radiator side which pulled it closer to the radiator, clocked it, and clamped it down. It gave me a bit more clearance but I really don't have much more - if any - more clearance than you do right now. I don't have or anticipate any issues.
Reply
Old Dec 29, 2020 | 10:11 AM
  #16  
69gto96z's Avatar
Thread Starter
TECH Fanatic
iTrader: (13)
 
Joined: May 2006
Posts: 1,245
Likes: 15
From: Rockwall, TX
Default

Originally Posted by beau.
My huron speed v3 ac kit has a similarly routed 4" bumper exit downpipe that I also thought was very close to the same radiator hose. I actually cut a small piece off of the hose on the radiator side which pulled it closer to the radiator, clocked it, and clamped it down. It gave me a bit more clearance but I really don't have much more - if any - more clearance than you do right now. I don't have or anticipate any issues.

Good to know. I pulled the downpipe last night, and plan to do some work tonight. Im going to shorten the outlet on the radiator, re flare the end, and cut the hose shorter. I tried the hose that Huron recommended first (installed picture below), and there was no way it would fit. I ended up with a different dayco hose (picture below) that has a very tight 90 to gain what clearance I currently have. Once I modify the outlet and shorten the hose more, I should end up with an inch or so air gap. Between the wrap on the downpipe and the reflective wrap on the hose, I think I will be good. If not, I’ll tweak the downpipe some.




Reply
Old Dec 29, 2020 | 10:23 AM
  #17  
Forcefed86's Avatar
8 Second Club
15 Year Member
Liked
Loved
Community Favorite
iTrader: (4)
 
Joined: May 2011
Posts: 8,485
Likes: 1,029
From: Wichita, KS
Default

I was gonna say, a monster dent in the DP isn't going to hurt performance any.
Reply
Old Dec 29, 2020 | 10:45 AM
  #18  
beau.'s Avatar
On The Tree
10 Year Member
 
Joined: Oct 2012
Posts: 124
Likes: 18
From: Jefferson, LA
Default

Originally Posted by 69gto96z
Good to know. I pulled the downpipe last night, and plan to do some work tonight. Im going to shorten the outlet on the radiator, re flare the end, and cut the hose shorter. I tried the hose that Huron recommended first (installed picture below), and there was no way it would fit. I ended up with a different dayco hose (picture below) that has a very tight 90 to gain what clearance I currently have. Once I modify the outlet and shorten the hose more, I should end up with an inch or so air gap. Between the wrap on the downpipe and the reflective wrap on the hose, I think I will be good. If not, I’ll tweak the downpipe some.
I like the playbook. Good luck!

Originally Posted by Forcefed86
I was gonna say, a monster dent in the DP isn't going to hurt performance any.
monster dent... hahaha
Reply
Old Dec 29, 2020 | 02:08 PM
  #19  
jordoza's Avatar
TECH Enthusiast
5 Year Member
Photogenic
 
Joined: Dec 2017
Posts: 676
Likes: 72
Default

Damn that hose is the ****. Whats the part number.
Reply
Old Dec 29, 2020 | 05:24 PM
  #20  
69gto96z's Avatar
Thread Starter
TECH Fanatic
iTrader: (13)
 
Joined: May 2006
Posts: 1,245
Likes: 15
From: Rockwall, TX
Default

Originally Posted by jordoza
Damn that hose is the ****. Whats the part number.
Dayco 81490
Reply



All times are GMT -5. The time now is 06:58 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE