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#1 |
Registered User
Join Date: Dec 1999
Location: Surrey, B.C. , Canada
Posts: 874
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How do you keep your stock exhaust on the collector?
Hey guys, I am seriously getting sick of having to tighten my exhaust constantly. Factory setup, dual 2" exhaust. I run this truck pretty hard and the engine torque makes the pipes loosen up. The exhaust guys I have talked to say if you run them hard there is no way to stop it. I have tried double nuts, brass nuts, stove nuts and am using the best donuts. I am considering adding a cross-over tube just to help hold the 2 pipes together so they move with the engine a little better. Then maybe if I have to get some poly mounts. If that doesnt work, I might try some flex joints but they always rot out. Anyone successfully sealed up their truck?
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1970 heavy duty C-10 fleetside sport truck. Vancouver B.C. Canada http://www.geocities.com/chevroletc1070 "Take up our quarrel with the foe: To you from failing hands we throw The torch; be yours to hold it high." Lieutenant Colonel John McCrae, Canadian Army |
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#2 |
Registered User
Join Date: Apr 2003
Location: missouri city, tx
Posts: 4,486
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have you thought about having it all welded up?
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70 longbed 496/th400/Ford 9" |
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#3 |
Registered User
Join Date: May 2000
Location: Petrolia,Ontario,Canada but working in Port Huron,Mi.
Posts: 1,772
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When I had my exhaust redone we got rid of the collector donuts and the muffler guy made some "metal" donuts to replace the fiber ones.
No leaks since. Sorry no pic's though.
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71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE |
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#4 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Build a set of exhaust hangers off of the transmission or trans mount. The OEM's have been doing this awhile. They put the first exhaust hanger off of the transmission rather than the frame. That way, the pipes tend to flex and rock along with the engine and trans rather that being tied to the frame which isn't flexing.
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I'm on the Instagram- @Gearhead_Kevin |
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#5 |
Still drivin' a Rat Rod
Join Date: Sep 2004
Location: Monett Missouri
Posts: 4,925
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This thread is just in time.I have the same problem with the pipes coming loose.Nothing seems to help either.I'm changing exhaust in a few days,so I'll try hanging it from trans.
Seems the standars trucks are worse than the automatic trucks too.I did notice the problem got better when I changed motormounts.
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Rusty Member #13872 Instead of saying.....you are a discomfort in the back of my front.....one should be able to say...... you are a pain in the *a$#* 71 GMC LWB 49 Chevy 85 Chevy G20 Check out my website |
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#6 |
Registered User
Join Date: Nov 2004
Location: "Under Montana skies."
Posts: 1,836
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If the only problem is the nuts loosening, try Stage8 fasteners. What is the manifold collector stud size? 3/8 bolt x 16 thread? Anyway, Stage8 sold me the nuts with their clip on piece that will hit the pipe before allowing the nut to back off the studs in my Rams Horn manifolds.
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'71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup. |
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#7 |
Senior Member
![]() Join Date: Sep 2001
Location: Seattle, WA, USA
Posts: 5,817
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I remember ole Stacy on Trucks showing a product on his show one time (usually I dismiss the products as wildly out of reach) that I thought was interesting.
They were these clamps that go around your collectors and essentially vice the thing together. It still used 3 bolts, but they were contained in a housing that provided uniform compression to the collector. Seemed like with the right bolts you could tighten those things down and they'd never leak. I don't remember the vendor though...anyone remember what I'm talking about?
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'69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA. |
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#8 | |
Registered User
Join Date: Nov 2004
Location: "Under Montana skies."
Posts: 1,836
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Quote:
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'71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup. |
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#9 | |
Registered User
Join Date: Nov 2004
Location: "Under Montana skies."
Posts: 1,836
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Quote:
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'71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup. |
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#10 |
Senior Member
![]() Join Date: Sep 2001
Location: Seattle, WA, USA
Posts: 5,817
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Ah they may have been for headers....but I imagine if you could chase down the vendor they may have a setup for manifolds as well! It would be smart on their part if they really wanted to help a hot-rodder out.
Again, they work like a clamp. They fit over the collector junction and provide uniform force over the entire connection rather than three points. Damn, I wish I could remember the vendor's name....
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'69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA. |
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#11 |
Registered User
Join Date: Dec 1999
Location: LEXINGTON,SC,USA
Posts: 208
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try these , they are what was used for copperhead i think
![]() http://amos.shop.com/amos/cc/main/ca...x-Coupler-Kits
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TIM ![]() '71 CUSTOM C-10 torch red ,350 roller GM crate,3.73 GEARS, REAR 4"DROP SPRING, FRONT 2.5" DROP SPINDLE-1.5"lower spring, FRONT=17x8(4.5bs) W/265-60-17, BACK=17x9.5 (5bs)W/285-60-17, Vintage Air Sure Fit AC------NEVER ENDING PROJECT!! |
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#12 |
Registered User
Join Date: Jun 2002
Location: NW ARKANSAS
Posts: 258
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I had the same problem a few years back.I had a new exhaust installed from the manifolds back and my passenger side pipe would work loose no matter how tight I cranked on it.I finally found out the donut was slowly shifting around due to a missing piece.Pull the pipes down and make sure there is something that will hold the donut in place.My driver side manifold had something to keep it in place but the passenger didn't.
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#13 |
Registered User
Join Date: Dec 1999
Location: Surrey, B.C. , Canada
Posts: 874
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Thanks guys. I think for now I will try a cross-over tube and some locking fasteners (like what was posted). If that doesnt work I will get some headers. I know a lot of people think headers leak but I have always been able to get them sealed up. Either that or the rest of the car was loud enough to not hear.
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1970 heavy duty C-10 fleetside sport truck. Vancouver B.C. Canada http://www.geocities.com/chevroletc1070 "Take up our quarrel with the foe: To you from failing hands we throw The torch; be yours to hold it high." Lieutenant Colonel John McCrae, Canadian Army |
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#14 | |
Registered User
Join Date: Nov 2004
Location: "Under Montana skies."
Posts: 1,836
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Quote:
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'71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup. |
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