JEGS sight plugs for Holley carburator and my ignorance - The 1947 - Present Chevrolet & GMC Truck Message Board Network

c10boob · 10-10-2013, 10:09 AM

When rebuilding my Holley carb I ordered those cool little clear sight plugs for $8 to make float adjustment easier and cleaner.

Yesterday, I took my truck to get it inspected and the guy doing inspections tells me to shut my truck off because it's got a fuel leak and sure enough, there was a giant puddle of gold (or gas) under the truck! This was caused by the fuel melting through the site plug and pouring out...

So apparently those plugs are for adjustment only and not meant to replace the original plugs.. I sure wish the package would have mentioned that for us newbies..

Longhorn 70 · 10-10-2013, 10:12 AM

No use crying over spilled gas.

Good news, no fire reported.

grancuda · 10-10-2013, 10:18 AM

Don't feel bad, you are not the first to run those regularly.

c10boob · 10-10-2013, 10:40 AM

Yep, lesson learned AND after fixing the leak it passed inspection - so 1 year after buying it I can finally use it as a daily driver!

Keith Seymore · 10-10-2013, 11:24 AM

Huh.

I've had these on my racecar for decades with no issues.

Think the difference is the use of race fuel vs a daily driver with some amount of alcohol/ethanol content in the pump gas?

Or - maybe Holley changed the material that they use to make these?

K

**WIDESIDE72** · 10-10-2013, 12:16 PM

Quote:

Or - maybe Holley changed the material that they use to make these?

K

Notice he said that they are "Jegs"plugs. Nothing against them, just a detail. I too have run clear holley plugs for years.

Keith Seymore · 10-10-2013, 01:40 PM

Quote:

Originally Posted by WIDESIDE72

Notice he said that they are "Jegs"plugs. Nothing against them, just a detail. I too have run clear holley plugs for years.

Ah - good point. Noted.

K

Wrenchbender Ret · 10-10-2013, 04:32 PM

I have never used them but always thought they were installed permantly. It seems if the floats were adjusted correctly there wouldn't be much gas leaking as the fuel level is at the bottom of the opening.

towbar · 10-10-2013, 09:13 PM

Quote:

Originally Posted by Wrenchbender Ret

I have never used them but always thought they were installed permantly. It seems if the floats were adjusted correctly there wouldn't be much gas leaking as the fuel level is at the bottom of the opening.

not if you actually drive the vehicle....fuel sloshes and is everywhere in the bowl.

I have a set of Holley brand in my Malibu, been there for 15 years I suppose. Of course they were made in Bowling Green KY, not Beijing China.

hugger6933 · 10-10-2013, 09:39 PM

I too have run several sets but then again they were the Holley brand made by the folks here in the good ol USA. Never thought of that being an issue.

oklalawnboy · 10-11-2013, 12:18 AM

Got em on my Demon (basically Holley) carb and no problems here.

*Fitz* · 10-11-2013, 07:36 PM

Quote:

Originally Posted by c10boob

When rebuilding my Holley carb I ordered those cool little clear sight plugs for $8 to make float adjustment easier and cleaner.

Yesterday, I took my truck to get it inspected and the guy doing inspections tells me to shut my truck off because it's got a fuel leak and sure enough, there was a giant puddle of gold (or gas) under the truck! This was caused by the fuel melting through the site plug and pouring out...

So apparently those plugs are for adjustment only and not meant to replace the original plugs.. I sure wish the package would have mentioned that for us newbies..

The Holley fuel bowl sight windows are a type of high temperature low expansion glass. The JEGS windows are...plastic.

10-10-2013, 10:09 AM	#1
c10boob Registered User Join Date: Oct 2012 Location: Columbia, MO Posts: 72	JEGS sight plugs for Holley carburator and my ignorance When rebuilding my Holley carb I ordered those cool little clear sight plugs for $8 to make float adjustment easier and cleaner. Yesterday, I took my truck to get it inspected and the guy doing inspections tells me to shut my truck off because it's got a fuel leak and sure enough, there was a giant puddle of gold (or gas) under the truck! This was caused by the fuel melting through the site plug and pouring out... So apparently those plugs are for adjustment only and not meant to replace the original plugs.. I sure wish the package would have mentioned that for us newbies..

10-10-2013, 10:12 AM	#2
Longhorn 70 Registered User Join Date: Dec 2012 Location: Chandler AZ Posts: 1,149	Re: JEGS sight plugs for Holley carburator and my ignorance No use crying over spilled gas. Good news, no fire reported. __________________ 1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9

10-10-2013, 10:18 AM	#3
grancuda Registered User Join Date: Nov 2007 Location: Central OK Posts: 396	Re: JEGS sight plugs for Holley carburator and my ignorance Don't feel bad, you are not the first to run those regularly.

10-10-2013, 10:40 AM	#4
c10boob Registered User Join Date: Oct 2012 Location: Columbia, MO Posts: 72	Re: JEGS sight plugs for Holley carburator and my ignorance Yep, lesson learned AND after fixing the leak it passed inspection - so 1 year after buying it I can finally use it as a daily driver!

10-10-2013, 11:24 AM	#5
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,226	Re: JEGS sight plugs for Holley carburator and my ignorance Huh. I've had these on my racecar for decades with no issues. Think the difference is the use of race fuel vs a daily driver with some amount of alcohol/ethanol content in the pump gas? Or - maybe Holley changed the material that they use to make these? K __________________ Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/

10-10-2013, 04:32 PM	#8
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,229	Re: JEGS sight plugs for Holley carburator and my ignorance I have never used them but always thought they were installed permantly. It seems if the floats were adjusted correctly there wouldn't be much gas leaking as the fuel level is at the bottom of the opening.

10-10-2013, 09:39 PM	#10
hugger6933 Registered User Join Date: Oct 2008 Location: Marianna Arkansas Posts: 7,280	Re: JEGS sight plugs for Holley carburator and my ignorance I too have run several sets but then again they were the Holley brand made by the folks here in the good ol USA. Never thought of that being an issue.

10-11-2013, 12:18 AM	#11
oklalawnboy Registered User Join Date: Jan 2012 Location: Glencoe Alabama Posts: 510	Re: JEGS sight plugs for Holley carburator and my ignorance Got em on my Demon (basically Holley) carb and no problems here. __________________ 72 Cheyenne super 10 08 3500 HD 4dr dually 12 ford flex (wifes ride) 76 Monte Carlo 83 Chevy short wide Silverado 96 Mazda Miata, 2000 Allegro Bus

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