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05-09-2018, 08:37 PM
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#1
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Member
Join Date: Feb 2015
Posts: 30
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454 hose identification
Hi All - time for some uneducated questions!
Chevy 454
These hoses I’m pointing to - they’re vacuum lines correct? I was trying to change out the fuel filter before the carb but didn’t have the correct flare wrenches (5/8 and 1 inch I believe?) these lines are rotted though and are falling apart - time to replace - I see a hose diagram on top of air intake but wanted to double check!
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05-09-2018, 08:42 PM
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#2
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Senior Member
Monaco Owners Club
Join Date: Oct 2014
Location: Rigby, Idaho
Posts: 3,948
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They sure seem to be. Only a few things interact with that quadrajet: fuel, vacuum, and gremlins.
__________________
Cheers,
TonyMac
2006 Monaco Safari Cheetah 40PMT
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05-09-2018, 09:33 PM
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#3
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Member
Join Date: Feb 2015
Posts: 30
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Quote:
Originally Posted by TonyMac
They sure seem to be. Only a few things interact with that quadrajet: fuel, vacuum, and gremlins.
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thanks - this is a new engine to me.....i presume i can just go ahead and replace all similar sized lines with vacuum hose?
Fuel lines are a different size?
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05-09-2018, 09:52 PM
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#4
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Senior Member
Join Date: May 2017
Location: Vancouver Wash
Posts: 7,227
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Fuel line at carb is a 3/8" steel line......there's a filter inside the big nut where the fuel line connects to the carb.......the other smaller lines are vacuum....where your pointing at in the 2nd pic is the inlet, and I beleive it's a 15/16 size......I've rebuilt so many of those through the years.....weak spot for that carb is the float....they make a brass replacement one, and between the carb base and bowl, there are two alum press in plugs that block off factory drilled passages that often seep fuel....they also make replacement plugs that have an o ring to seal them up......when putting filter fitting back in, be careful about over tightening....also, if the idle mixture plugs are still in, they can be removed with the carb off......
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05-10-2018, 10:24 AM
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#5
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Member
Join Date: Feb 2015
Posts: 30
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Quote:
Originally Posted by bob caldwell
Fuel line at carb is a 3/8" steel line......there's a filter inside the big nut where the fuel line connects to the carb.......the other smaller lines are vacuum....where your pointing at in the 2nd pic is the inlet, and I beleive it's a 15/16 size......I've rebuilt so many of those through the years.....weak spot for that carb is the float....they make a brass replacement one, and between the carb base and bowl, there are two alum press in plugs that block off factory drilled passages that often seep fuel....they also make replacement plugs that have an o ring to seal them up......when putting filter fitting back in, be careful about over tightening....also, if the idle mixture plugs are still in, they can be removed with the carb off......
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thanks Bob - just to confirm the two nuts holding the fuel filter in are 3/8 and 15/16?
I need to order them to swap out this filter - i've been told 5/8 and 1 inch flare wrenches are needed?
thanks again
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05-10-2018, 10:59 AM
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#6
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Senior Member
Join Date: Sep 2007
Location: texas
Posts: 2,422
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5/8 and 1 inch
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05-10-2018, 11:18 AM
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#7
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Senior Member
Join Date: May 2017
Location: Vancouver Wash
Posts: 7,227
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Line is 3/8.....fitting is 5/8th.....filter nut could be 1"......flare wrench for 5/8, but open end for 1"......
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05-10-2018, 02:40 PM
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#8
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Member
Join Date: Feb 2015
Posts: 30
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awesome - thanks all.....where can u buy a 1" flare wrench - 5/8ths is easy to find.....
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05-10-2018, 02:48 PM
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#9
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Senior Member
Monaco Owners Club
Join Date: Oct 2014
Location: Rigby, Idaho
Posts: 3,948
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Quote:
Originally Posted by ifsmithy
awesome - thanks all.....where can u buy a 1" flare wrench - 5/8ths is easy to find.....
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Harbor Freight would be my first place to look. Go online.
__________________
Cheers,
TonyMac
2006 Monaco Safari Cheetah 40PMT
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05-10-2018, 02:59 PM
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#10
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Senior Member
Join Date: May 2017
Location: Vancouver Wash
Posts: 7,227
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You'll never get that flare wrench to fit.....too many things in the way
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05-10-2018, 03:40 PM
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#11
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Member
Join Date: Feb 2015
Posts: 30
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Quote:
Originally Posted by bob caldwell
You'll never get that flare wrench to fit.....too many things in the way
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yeah i'm glad you said that - I was thinking the same thing - a job for a mechanic at the next service.....
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05-12-2018, 06:54 AM
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#12
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Senior Member
Join Date: Aug 2017
Posts: 224
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Do you live in an emissions testing state? If not, several of those lines can be eliminated. You need a vacuum line from the carb to the vacuum advance on the distributor. Evaporative emissions canister...egr valve would be good to keep...
__________________
2002 Ford F250 7.3L
2005 Ameri-Camp 300BHS
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