292 straight 6 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

oldsub86 · 06-21-2003, 06:38 PM

I posted a few days ago about my exhaust leak. Took the manifolds off this afternoon and learned what the problem is. Not major - bolt fell out and gasket gave up. For those familiar with the inline 6's - there are 2 studs on the top and a bolt from the bottom that hold the intake and exhaust manifolds together under the carb. The bolt from the bottom has fallen out and the lack of tension has permitted the gasket to deteriorate to the point where it now leaks. Shouldn't be a big problem to fix unless I decide to start replacing studs, painting etc. It needs it but I may put that off as the truck needs many other things worse.

I have a question too for anyone who knows. On the back side of carb on the intake there is a fitting that feeds the hose to the pcv valve on the rocker cover. How does this fitting fasten in? Mine is a bit the worse for wear and is sloppy. I have had it glued in place with silicon for a long while. I could tap the hole and thread in a barbed hose adapter or something such but then it would not have the pipe that feeds down and around into the intake unless I come up with a means of putting that into the new plug.

Longhorn Man · 06-22-2003, 12:06 AM

While not familiar with either inline, i would imagine it was a threaded plug.
TTT for anyone who can answer with experiance.

**'68OrangeSunshine** · 06-22-2003, 04:08 AM

Was it kind of a curved 1/4" tube a couple inches long on a squared off 1/2"head with a barbed nipple outside the manifold?
If I remember right that's just a friction fit.
I went with an Offy intake, Clifford headers and a 390 cfm 4bbl Holley since the late '70s, so I've forgotten a lot of that stock stuff. You might try the guys at
www.inliners.org
or the Stovebolt Page. More bone stock people hang out there.
292s are my favorite engine.
Good luck

oldsub86 · 06-23-2003, 11:53 PM

Yes it is a friction fit piece. It has become loose so I guess it is time for some JB weld or something like that to carry on for a bit.

SEVEND2 · 06-24-2003, 02:30 AM

I have the same problem every hmm 6 months on my Straight 6 in my 81 silverado. its a pain (((it holds about 8 months with some JB weld on it))

iron dutch · 06-25-2003, 04:10 AM

Here's a pic of the dingus:

Brad · 06-25-2003, 10:28 PM

I think if you could take the tubing off the brass piece and then stick the brass fitting in the manifold it should fit tight. I have just the brass fitting (mines a 90 degree bend) in and I've never had a problem.

stelth2002 · 06-26-2003, 03:20 AM

68 orange, you've been running that setup for that long and it still works well. I should be set then also, mines not the same by any means, ( goes faster maybe) but i hope it lasts that long. Brad i got your cable, its installed and works great

. thanks

**'68OrangeSunshine** · 06-26-2003, 05:18 AM

Actually, I have been running a Holley 390 cfm 4bbl on an Offy intake since 1978. My PCV hose runs to a nipple on the carb itself. I just found the "dingus" piece in a box of parts [original dissassembled 292 core] that I put up in a shed in 1977 after building up the block that ran from '77 to 2002. Currently getting closer to completing the boxed 292 and putting Orange Sunshine back together. Running the hell out of my 350 powered '71 Jimmy (K/5). V8s do not handle the heat like an L6 will. I will be very happy to get back on the road in my "516" Orange stepside.

06-21-2003, 06:38 PM	#1
oldsub86 Registered User Join Date: Dec 2002 Location: Canada Posts: 695	292 straight 6 I posted a few days ago about my exhaust leak. Took the manifolds off this afternoon and learned what the problem is. Not major - bolt fell out and gasket gave up. For those familiar with the inline 6's - there are 2 studs on the top and a bolt from the bottom that hold the intake and exhaust manifolds together under the carb. The bolt from the bottom has fallen out and the lack of tension has permitted the gasket to deteriorate to the point where it now leaks. Shouldn't be a big problem to fix unless I decide to start replacing studs, painting etc. It needs it but I may put that off as the truck needs many other things worse. I have a question too for anyone who knows. On the back side of carb on the intake there is a fitting that feeds the hose to the pcv valve on the rocker cover. How does this fitting fasten in? Mine is a bit the worse for wear and is sloppy. I have had it glued in place with silicon for a long while. I could tap the hole and thread in a barbed hose adapter or something such but then it would not have the pipe that feeds down and around into the intake unless I come up with a means of putting that into the new plug. __________________ 1968 Chevy - 292 with a powerglide

06-22-2003, 04:08 AM	#3
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,504	Was it kind of a curved 1/4" tube a couple inches long on a squared off 1/2"head with a barbed nipple outside the manifold? If I remember right that's just a friction fit. I went with an Offy intake, Clifford headers and a 390 cfm 4bbl Holley since the late '70s, so I've forgotten a lot of that stock stuff. You might try the guys at www.inliners.org or the Stovebolt Page. More bone stock people hang out there. 292s are my favorite engine. Good luck __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

06-23-2003, 11:53 PM	#4
oldsub86 Registered User Join Date: Dec 2002 Location: Canada Posts: 695	Yes it is a friction fit piece. It has become loose so I guess it is time for some JB weld or something like that to carry on for a bit. __________________ 1968 Chevy - 292 with a powerglide

06-24-2003, 02:30 AM	#5
SEVEND2 Registered User Join Date: Aug 2001 Location: Menifee, Calif, USA Posts: 2,145	I have the same problem every hmm 6 months on my Straight 6 in my 81 silverado. its a pain (((it holds about 8 months with some JB weld on it)) __________________ With a 1972 Chevy Custom-10 Long bed w/350cid th350, (under-construction). Progress on truck so far (follow link): http://67-72chevytrucks.com/vboard/s...ad.php?t=51051 and stage 2 http://67-72chevytrucks.com/vboard/s...ad.php?t=58132 ~ "Why couldn't you have just put the bunny back in the box?" ~

06-25-2003, 04:10 AM	#6
iron dutch Registered User Join Date: Jun 2003 Location: arizona Posts: 1	Here's a pic of the dingus: Attached Images __________________ If you don't believe in addiction, you don't build 292's

06-22-2003, 12:06 AM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	While not familiar with either inline, i would imagine it was a threaded plug. TTT for anyone who can answer with experiance.

06-25-2003, 10:28 PM	#7
Brad Out of the carpool lane. Join Date: Jan 2000 Location: Clark Co, WA Posts: 5,672	I think if you could take the tubing off the brass piece and then stick the brass fitting in the manifold it should fit tight. I have just the brass fitting (mines a 90 degree bend) in and I've never had a problem. __________________ 1968 C-10 SWB, 5.7 Vortec/700R4/3.73 posi, Torch Red 1968 Camaro, 250/Powerglide, all original (No, I'm not gonna drop a 350 in it!...Jeez!) 2000 Honda VFR in the faster yellow! 2008 Husqvarna TE-610 1967 C-10 SWB 'Six Appeal'-Gone but not forgotten...

06-26-2003, 03:20 AM	#8
stelth2002 Young Gun wth Fast Inline Join Date: Jan 2002 Location: Idaho Posts: 1,475	68 orange, you've been running that setup for that long and it still works well. I should be set then also, mines not the same by any means, ( goes faster maybe) but i hope it lasts that long. Brad i got your cable, its installed and works great . thanks __________________ 1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!

06-26-2003, 05:18 AM	#9
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,504	Actually, I have been running a Holley 390 cfm 4bbl on an Offy intake since 1978. My PCV hose runs to a nipple on the carb itself. I just found the "dingus" piece in a box of parts [original dissassembled 292 core] that I put up in a shed in 1977 after building up the block that ran from '77 to 2002. Currently getting closer to completing the boxed 292 and putting Orange Sunshine back together. Running the hell out of my 350 powered '71 Jimmy (K/5). V8s do not handle the heat like an L6 will. I will be very happy to get back on the road in my "516" Orange stepside. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.



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