Fuel leak

[GBsPanhead]

OK, finally replaced my rubber fuel lines with some hard lines. All good, except a leak where line goes into carb. Can tighten the line, but stills drips. Looks like the inlet part on the carb is scored, (see pic). Can this part be ordered somewhere, like Holley? Or can some type of sealing washer/o'ring be put in there where the hard line threads into? Thanks!!

 

[CBODY67]

The fitting should be in the Holley carb parts catalog. Might even be at an area auto supply that carries some Holley hot rod parts? Used by Chrysler and GM.

I presume the flare on the fuel line is in good condition, too?

CBODY67

 

[GBsPanhead]

The fitting should be in the Holley carb parts catalog. Might even be at an area auto supply that carries some Holley hot rod parts? Used by Chrysler and GM.

I presume the flare on the fuel line is in good condition, too?

CBODY67

Hard lines are new, never installed. But that doesn't mean anything lol.

The old line was soooooo tight in the fitting on the carb, it may have damaged that part. Flare on the line looks clean and smooth.

Any idea what 'model' Holley this is? I can get more pics if necessary. Thanks!!

Off to do more research....

 

[GBsPanhead]

Kinda on a side note...the monthly hotrod car swap meet is tomorrow. Most all the big vendors will be there. I'll take the part with me, also need to pick up some belts for my new AC system.

 

[Davea Lux]

Kinda on a side note...the month hotrod car swap meet is tomorrow. Most all the big vendors will be there. I'll take the part with me, also need to pick up some belts for my new AC system.

www.holley.com go to the carb parts section. You will need the list number for your carb.

Dave

 

[GBsPanhead]

Found the part! Thanks Dave!!

26-27 is part # look like.

 

[CBODY67]

Seems like that fitting was first used on the '70 Z/28 or Corvette LT-1 Holley 4150s. Which would be the same as the 4160 as to the fitting itself. No need to look for particular carb models, just look in the catalog and match it up.

CBODY67

 

[GBsPanhead]

OK...fuel leak fixed at inlet. Now have a leak here where screwdriver is pointed. Both front and rear bowls, same place. Looks like some type of plug.

Clean out the area with wire wheel and Dremel, then fill the area smooth with JB Weld? Or get new bowls? Or??

This Holley runs perfect, don't want to replace it. Someone spent some time I would think in the past getting this carb dialed in. Plugs look good, starts easy, doesn't flood, secondaries work beautifully.

 

[Davea Lux]

Take a magnet and see if that is a steel plug, if it is you can pop it out, Check the Holley parts book to see if it is replacement item, www.holley.com. If it is pot metal, get new bowls for a permanent fix. Which Holley is that?

Dave

 

[GBsPanhead]

Hey Dave. Looking on Holley site now. From what I can tell 4166. If I'm reading date code right, its from 1988? Bowls are not that expensive...on ebay about 50 front 45 rear.

 

[rags]

get new bowls for a permanent fix.

it's "game over". have followed the story of that car for a while. very cool.

 

[Davea Lux]

Hey Dave. Looking on Holley site now. From what I can tell 4166. If I'm reading date code right, its from 1988? Bowls are not that expensive...on ebay about 50 front 45 rear.

View attachment 286751

The last digit is the decade indicator, '68,'78 etc The first 3 digits are the Julian date of the year. Days of the year are numbered 1-365, so your carb is probably from 1968 and was produced on the 278 day of the year. 4166 is a common list for Mopar Holley carbs in the late '60's

Dave

 

[GBsPanhead]

Dave....you think this could be the original carb on my '69 300?

 

[Davea Lux]

Dave....you think this could be the original carb on my '69 300?

Very likely as carbs are usually several months older than the production date of the cars. Which motor do you have? And what was the build date for the car? By the fall of '68 they were already producing '69 model cars.

Dave

 

[GBsPanhead]

Dave, Can you tell from these....

 

[Davea Lux]

440, 350 horsepower built 11-01-68. That is probably the factory carb. Mopar build dates go 01=Jan to 09=September, A=Oct, B=Nov, C=Dec. Your carb if a few weeks older than the car, so that is an acceptable number for the original carb.

Dave

 

[GBsPanhead]

Thanks Dave!! Very good info to have. Made my day!! I knew the VIN matched the frame/motor and trans, and those items all match as far as numbers. Now a date correct carb makes me more excited lol. Unfortunately the radiator was replaced a few years ago, so not date correct.

Anyway, searching ebay and Holley site for some new bowls. Going to see if I can get the originals repaired. Soldered maybe.

 

[CBODY67]

The replacement bowls from Holley are somewhat generic, if that matters. Look in their parts listings for the closest match. When you pull that front bowl off, don't forget to put new O-rings on the balance tube that feeds the rear bowl (front and rear seals), for good measure.

The ethanol in the fuel has probably eroded the plug's sealing solder. New bowls would be the best fix, but using JBWeld would be similar to re-sealing the float bowl "well seals" on a QuadraJet carb. Except that the QJet "fix" would be hidden.

Just some thoughts,
CBODY67

 

[GBsPanhead]

The replacement bowls from Holley are somewhat generic, if that matters. Look in their parts listings for the closest match. When you pull that front bowl off, don't forget to put new O-rings on the balance tube that feeds the rear bowl (front and rear seals), for good measure.

The ethanol in the fuel has probably eroded the plug's sealing solder. New bowls would be the best fix, but using JBWeld would be similar to re-sealing the float bowl "well seals" on a QuadraJet carb. Except that the QJet "fix" would be hidden.

Just some thoughts,
CBODY67

Yes, the seals on transfer tubes are pretty much all gone. On Holley's site they have new style and old style seals. I'm going out on a limb, and thinking these are old style seals since carb is so old. I don't have enough of the old seals left to see what they originally looked like.

The bowls seem to be "marine style" based on what I have. Bowl gaskets look a little confusing. My bowl seals/gasket do not look like what's on Holley's site. Close but not an exact match. Mine may be so old, the design may have changed over the years maybe, but look like they should work.

 

[CBODY67]

The transfer tube seals were just thick, black O-rings. Just a smidge smaller ID and larger OD for a good fit.

I was thinking the bowl gaskets, get the blue ones (coated), were pretty much generic for the side-hung bowls, or even for the center-pivot float race bowls. ALSO, get the newer ethanol-resistant accel pump diaphragm! But, on second thought, the float bowl gasket "kit" has a few different ones, or 5 of the same?

I believe the marine-style bowls have no external bowl vent. Check the FSM illustrations for good measure.

The Holley Variable Spec Manual details all of the parts on particular carburetors, from "day one", pretty much. There are many common "base" parts, so the listing for each carb number details the items which are different (with Holley Part Numbers). A VERY interesting publication and tech resource.

Sounds like you're on the right track.

CBODY67