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CC Advertisers
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12-17-2006, 07:10 PM
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Club Cobra Member
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Join Date: Sep 2002
Location: FLORENCE, AL,
AL
Cobra Make, Engine: Hurricane Cobra - Keith Craft 428 stoker, 600 HP/614 Trq
Posts: 71
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Not Ranked
sidepipe seal
I have headers that slip into my sidepipes. So far I have not been able to get them to seal properly. I have cleaned both sides of the pipes on the headers and the side pipes and used Permatex Ultra Copper in a quarter inch thick ring. I put the ring about one quater inch from where the headers bottom out slipping into the sidepipes (four into four pipes). I allowed the seal to set up for about 24 hours.
Is there a better application method? Should I be using a different product?
I am open for suggestions.
Thanks for the help in advance.
Coach Mike
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12-17-2006, 07:45 PM
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Senior Club Cobra Member
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Join Date: Jun 1999
Location: Fallbrook, CA USA,
CA
Cobra Make, Engine: Porsche 928 S4
Posts: 739
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Not Ranked
Coach Mike,
We use regular old wheel bearing grease on the JBL slip fit headers.
Just glop it on and start the engine and let it run long enough for the smoke to stop and cut it off.
Note: The fits have to be good and a true slip fit. IE: .015 per inch Dia. clearance max. (This is the standard as used for piston aircraft exhaust systems and works well so far on mild steel headers. If you use Inconel, the clearances can be tighter and you need no grease.)
I would check your fits and adjust to the above numbers. Any good muffler shop will be able to do this for you..
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12-17-2006, 07:57 PM
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Club Cobra Member
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Join Date: Sep 2002
Location: FLORENCE, AL,
AL
Cobra Make, Engine: Hurricane Cobra - Keith Craft 428 stoker, 600 HP/614 Trq
Posts: 71
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Not Ranked
Richard:
Let me get this straight. I can leave the pipes on the car and put axle grease on the top of the slip ins, start the car and let it run down into the fittings as the engine is running. Once the fitting stop smoking I cut the engine off. If my fitting are larger than your specs (.015) then I may have to perform this procedure more than once. This will seal the pipes?
Thanks, Coach Mike
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12-17-2006, 08:15 PM
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Senior Club Cobra Member
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Join Date: Oct 2004
Location: Roanoke,
Tx
Cobra Make, Engine: 2002 Lone Star Classics LS427, 428 CJ engine stroked to 464, 580hp/590tq at flywheel
Posts: 557
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Not Ranked
What problem are you having - mine are slip and I use nothing.
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12-17-2006, 08:22 PM
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Club Cobra Member
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Join Date: Sep 2002
Location: FLORENCE, AL,
AL
Cobra Make, Engine: Hurricane Cobra - Keith Craft 428 stoker, 600 HP/614 Trq
Posts: 71
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Not Ranked
RB:
I have exhaust leak at the joints of the slip fittings.
Coach MIke
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12-17-2006, 09:17 PM
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CC Member
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Join Date: Mar 2000
Location: Fairfield, NJ, USA,
NJ
Cobra Make, Engine: A & C, 351W, Tremec 3550. Exiled Member: Club Cranky
Posts: 5,897
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Not Ranked
I cut some slits in them so I could compress them once I slid them onto the headers and used these wide clamps. Works fine.
__________________
Roscoe
"Crisis occurs when women and cattle get excited!"....James Thurber
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12-17-2006, 09:19 PM
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Club Cobra Member
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Join Date: Sep 2002
Location: FLORENCE, AL,
AL
Cobra Make, Engine: Hurricane Cobra - Keith Craft 428 stoker, 600 HP/614 Trq
Posts: 71
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Not Ranked
Roscoe:
Great idea. Where did you get the clamps? Is that all you did, cut the slips and then apply the clamps?
Thanks, Coach Mike
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12-18-2006, 07:10 AM
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CC Member
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Join Date: Mar 2000
Location: Fairfield, NJ, USA,
NJ
Cobra Make, Engine: A & C, 351W, Tremec 3550. Exiled Member: Club Cranky
Posts: 5,897
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Not Ranked
You can get the clamps in varous widths from Summit, Jegs, JC Whitney, etc.
They are very thin stainless and actually shape to the pipes. The only thing to do after install is cutoff the excess threads from the bolts. You could use a sealer but I didn't.
I had to take them off twice and worried that the bolts would be too short but once they are 'shaped' they go back on with no problem.
Roscoe
__________________
Roscoe
"Crisis occurs when women and cattle get excited!"....James Thurber
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12-18-2006, 04:21 PM
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Senior Club Cobra Member
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Join Date: Jun 1999
Location: Fallbrook, CA USA,
CA
Cobra Make, Engine: Porsche 928 S4
Posts: 739
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Not Ranked
Quote:
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Originally Posted by COACH MIKE
Richard:
Let me get this straight. I can leave the pipes on the car and put axle grease on the top of the slip ins, start the car and let it run down into the fittings as the engine is running. Once the fitting stop smoking I cut the engine off. If my fitting are larger than your specs (.015) then I may have to perform this procedure more than once. This will seal the pipes?
Thanks, Coach Mike
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Coach Mike,
You need to put the grease on before you slide them on.
If your pipes have too much clearance, they will not seal no matter what you put on them.
If your primaries are 1.75 Dia. then the proper clearance will be .0265 >.0300 in. With these clearances, you will not need a sealer just as rblong states. |
12-18-2006, 07:45 PM
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Club Cobra Member
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Join Date: Sep 2002
Location: FLORENCE, AL,
AL
Cobra Make, Engine: Hurricane Cobra - Keith Craft 428 stoker, 600 HP/614 Trq
Posts: 71
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Not Ranked
Gentlemen:
Thanks for the help. I'm back to work on the problem.
Coach Mike
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12-19-2006, 07:38 PM
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CC Member
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Join Date: May 2004
Location: Mobile,
Al
Cobra Make, Engine: StreetBeast 66 replica 302 350HP
Posts: 335
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Not Ranked
I bought my side pipes and headers from ShellValley, I never could get them to seal, so I welded on flanges, bought them from Finishline
__________________
PapaJohn
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12-19-2006, 07:52 PM
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CC Member
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Join Date: Aug 2003
Location: watertown,
n.y
Cobra Make, Engine: titanium,blk stripes 427 ERA-682 428SCJ 2x4 toploader
Posts: 19
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Not Ranked
When I put mine together I used a good grade of furnace cement.It will take the high heat and seals the joints. NO LEAKS !
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02-14-2008, 11:23 PM
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CC Member
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Join Date: May 2002
Location: Ashburton, New Zealand,
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Cobra Make, Engine: UK Ram SC. KC-Yates 373, Jerico 5 speed.
Posts: 1,240
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Not Ranked
Sidepipe seal
Interesting thead,
I have a set of slip joint primaries and slip in to collectors, the side pipes were made by Chris @ SPD exhaust and a real nice fit!
I wish to HPC the pipes to make them last longer and reduce heat, so I am wondering with the pipes being a nice quite tight slip fit, the high performance coating may inhibit assembly, or the answer might be to coat them assembled!
Any tips appreciated.
__________________
A J. Newton
The 1960's rocked!
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02-15-2008, 12:05 AM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
You can sand or grind after application or even possibly tape off the area before application.
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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02-15-2008, 08:37 AM
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CC Member
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Join Date: May 2002
Location: Ashburton, New Zealand,
..
Cobra Make, Engine: UK Ram SC. KC-Yates 373, Jerico 5 speed.
Posts: 1,240
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Not Ranked
sidepipe seal
Rick,
Having not worked with the stuff, your recommendation is quite simple - thanks!
__________________
A J. Newton
The 1960's rocked!
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