welding H-pipe question

84LX89GT · 07-25-2002, 12:04 AM

I was wondering if i'd have any problems if i welded the cross-over on my offroad h-pipe to join the two sides. It appears that the clamp isn't holding hard enough because there are slide (scratch) marks in the crossover area and there is a small leak because of the clamp. I don't want to tighten it anymore because it's on there pretty tight. and it's not leaking a whole lot, but i can hear it when shifting and it's annoying and i don't want to bend the tube because of overtightening and make it worse.

Is it a good idea to weld the crossover completely so there's no movement between the two?
Thanks,

Bad89stang · 07-25-2002, 02:35 AM

Some of them are all one piece so I say go for it. Just make sure that your car is supported by the wheels on a lift when it is welded. Sort of like welding subframes.

LX5liter · 07-25-2002, 12:02 PM

I know that the factory H-pipes are welded from the factory (at least mine is) so I think it would be O.K. I would prefer them welded, myself.

89 Cobra LX · 07-25-2002, 12:13 PM

Really, the only way to get the two pieces to seal 100% is to weld it. The clamps just don't cut it.

Dog5ohfun · 07-25-2002, 11:33 PM

Speaking from a welding experience I would put tiny weld tacks around the crossover tube. Then take the H-pipe off and weld it completely off the car. You will get a nicer weld than if you do it on the car. Whatever is easier for you. I am going to weld mine in a few weeks when I get home from school. A nice touch is high temperature paint when you finish the weld to prevent rust.

84LX89GT · 07-28-2002, 11:46 PM

Thank's everyone i appreciate your replies, i'm gonna weld it and get rid of the noise

07-25-2002, 12:04 AM	#1
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	welding H-pipe question I was wondering if i'd have any problems if i welded the cross-over on my offroad h-pipe to join the two sides. It appears that the clamp isn't holding hard enough because there are slide (scratch) marks in the crossover area and there is a small leak because of the clamp. I don't want to tighten it anymore because it's on there pretty tight. and it's not leaking a whole lot, but i can hear it when shifting and it's annoying and i don't want to bend the tube because of overtightening and make it worse. Is it a good idea to weld the crossover completely so there's no movement between the two? Thanks, __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)

07-25-2002, 02:35 AM	#2
Bad89stang Registered Member Join Date: Aug 2001 Location: Ft. Worth, TX Posts: 456	Some of them are all one piece so I say go for it. Just make sure that your car is supported by the wheels on a lift when it is welded. Sort of like welding subframes. __________________ You're gonna need your seatbelt

07-25-2002, 12:02 PM	#3
LX5liter dude5l Join Date: May 2001 Location: Grande Prairie, Alberta, Canada Posts: 603	I know that the factory H-pipes are welded from the factory (at least mine is) so I think it would be O.K. I would prefer them welded, myself. __________________ Good luck! Brad R. 1992 L.X. 5.0 coupe MODS: A few little bolt ons New Best time ...11.60 @ 128 mph @ 2000+ ft altitude. Rice Haters Club member #39 Users rides #2542

07-25-2002, 12:13 PM	#4
89 Cobra LX Don Corlione Join Date: Jun 2001 Location: Omaha NE USA Posts: 491	Really, the only way to get the two pieces to seal 100% is to weld it. The clamps just don't cut it. __________________ Eric - 89 Mustang LX coupe 5 speed 302-Cobra Intake-GT40p heads-TFS stage 1 cam-FRPP 1.6 roller rockers-3:73 gears-KYB shocks and struts-Eibach Pro-kit-HPM Mega-bite upper and lower control arms-FRPP aluminum driveshaft-16x8 Chrome Cobra Rs R.H.C. #14

07-25-2002, 11:33 PM	#5
Dog5ohfun Registered Member Join Date: Feb 2002 Location: Arlington, Washington Posts: 92	Speaking from a welding experience I would put tiny weld tacks around the crossover tube. Then take the H-pipe off and weld it completely off the car. You will get a nicer weld than if you do it on the car. Whatever is easier for you. I am going to weld mine in a few weeks when I get home from school. A nice touch is high temperature paint when you finish the weld to prevent rust. __________________ Black 1990 LX DSS Racing Super Pro Bullit 331, AFR 185, Anderson B31 Cam, 1.6 DSS rockers, Cobra Intake w/ 2 phenolic spacer, Aluminum DS, 3.73 gears, Tremec 3550, Lakewood SFI Bellhousing, MSD Digital 6+, Spintech Side Exhaust,

07-28-2002, 11:46 PM	#6
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	Thank's everyone i appreciate your replies, i'm gonna weld it and get rid of the noise __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Power Pipe installation question	p51302	Power Adders	2	06-02-2004 05:13 PM
H- Pipe question	82 GT	Windsor Power	5	06-01-2004 02:23 PM
cat pipe question	slo95	Windsor Power	3	10-10-2001 08:01 PM
H pipe question	DemonLp	Windsor Power	1	03-13-2001 12:19 AM
X pipe Question	97ScottieGT	Modular Madness	1	10-17-2000 11:34 PM