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[GMCnet] '73 - engine department question [message #322272] Thu, 17 August 2017 18:57 Go to next message
Olly Schmidt is currently offline  Olly Schmidt   United States
Messages: 1265
Registered: February 2014
Location: Germany and Scottsville, ...
Karma: 8
Senior Member
My friend is trying to fix some issues, and came across

http://possy.de/whatis.jpg

Anyone know what that is for?
--
Best regards

Peer Oliver Schmidt
PGP Key ID: 0x83E1C2EA

'76a Eleganza II, CA
'73 Sequoia, NH

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Best regards

Olly Schmidt
PGP Key ID: 0x18a9 3a1f 4196 bf22
'76a Eleganza II, VA
'73 Sequoia, SH, Germany
Re: [GMCnet] '73 - engine department question [message #322274 is a reply to message #322272] Thu, 17 August 2017 20:07 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
Senior Member
Peer Oliver Schmidt wrote on Thu, 17 August 2017 19:57
My friend is trying to fix some issues, and came across

http://possy.de/whatis.jpg

Anyone know what that is for?
--
Best regards

Peer Oliver Schmidt
PGP Key ID: 0x83E1C2EA

'76a Eleganza II, CA
'73 Sequoia, NH




Peer,

The picture is pretty good, but the interesting feature is still kind of hidden.
My guess, based on some experience, would be that it is a pressure tap from the fuel line. Some PO silver brazed a 1/4 SAE flare in there and then the pressure gauge and line was removed. Along the way the fitting got capped, but he didn't have a 1/4 SAE flare cap, he just used what he had.

I like the fact that the rubber line is starting to crack.

Matt - hold up at the FMCA lot in Cinci


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: [GMCnet] '73 - engine department question [message #322292 is a reply to message #322272] Fri, 18 August 2017 08:08 Go to previous messageGo to next message
jhbridges is currently offline  jhbridges   United States
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
Senior Member
Looks like a good way to set the place on fire. Wait till the engine is >cold< and then take the rubber hose off and put a proper cap on the line. It might have been for a gauge or someone's idea of how to beat vapor lock,. Either way, get rid of it.

--johnny


Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons. Braselton, Ga. I forgive them all, save those who hurt the dogs. They must answer to me in hell
Re: [GMCnet] '73 - engine department question [message #322293 is a reply to message #322272] Fri, 18 August 2017 08:41 Go to previous messageGo to next message
JohnL455 is currently offline  JohnL455   United States
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
Senior Member
That hose is perished as the Brits say. No rubber between pump and carb is the mantra. Also what is the plastic vacuum Y just above the fuel inlet? That style usually has a metal restrictor orifice in one leg.

John Lebetski
Woodstock, IL
77 Eleganza II
Re: [GMCnet] '73 - engine department question [message #322296 is a reply to message #322272] Fri, 18 August 2017 09:02 Go to previous message
77Royale   United States
Messages: 461
Registered: June 2014
Location: Mid Michigan
Karma: 6
Senior Member
Guessing it was maybe for an aux gas can (Boat can) to bypass the mechanical pump. Perhaps the tanks were full of crap and in lieu of dropping the tanks they brazed in the fitting...

Or that was the way someone ran an electric fuel pump to the carb.

Either way, I would replace that line with a braided heat shield line from one of the Jims.

http://www.appliedgmc.com/prod.itml/icOid/853


77 Royale, Rear Dry Bath. 403, 3.55 Final Drive, Lenzi goodies, Patterson carb and dizzy. Mid Michigan
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