So I got this new Y pipe put on... - Defender Source
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  #1  
Old June 5th, 2015, 06:48 PM
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So I got this new Y pipe put on...

And there seems to be a ticking noise now only when I accelerate. I had the guys at the muffler shop recheck for leaks and they tightened it again at the manifold and said it was fine. They say the tick is coming from my new "high flow cats".
Only makes the noise when I am in gear accelerating. I definitely didn't notice it before.
Also now when I go over a big bump, a loud noise is made coming from below like something is coming together.
I'm waiting on it to cool down to check the bolts at the manifold again. Any ideas?
It's a Manaflow Y pipe.
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  #2  
Old June 5th, 2015, 06:53 PM
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Did they use new gaskets where the pipes meet the manifolds? Any chance you've got a cracked manifold?

You'd think they'd be able to put it in the air and reproduce it pretty quickly. Plug up the tail pipe and you should be able to find a leak in no time.
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Old June 5th, 2015, 07:00 PM
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Quote:
Originally Posted by jafir View Post
Did they use new gaskets where the pipes meet the manifolds? Any chance you've got a cracked manifold? You'd think they'd be able to put it in the air and reproduce it pretty quickly. Plug up the tail pipe and you should be able to find a leak in no time.
Yes brand new gaskets. No cracked manifold. So this definitely sounds like an exhaust leak? Wouldn't be a normal noise from new cats, right?
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Old June 5th, 2015, 07:02 PM
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I don't know. Based on the other noise you're hearing maybe something is very close to rubbing and when you really get on it things flex enough to barely touch?

Can you make the sound for us?
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Old June 5th, 2015, 07:09 PM
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Didn't someone post that the tolerances made these really close to the frame? What is the rest of your exhaust? All good hangers?

I need to look at mine. I used magnaflow but I had them welded in to my original y pipe.
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Old June 5th, 2015, 07:13 PM
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Be sure they got all the old gaskets off also.
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Old June 5th, 2015, 07:57 PM
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I supplied all new gaskets. I can already tell it's going to drive me nuts even if it's normal. I swear I didn't hear it before. I guess I'm going to have them take it off and check gaskets. It only makes the noise when accelerating in gear.
The rest of the exhaust is NRP.
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Old June 5th, 2015, 08:20 PM
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Here is a shitty recording. If you can hear through the belt noise, listen for clicking while accelerating through 2nd. Best not to watch but listen.

http://youtu.be/NTRPJGBv3C0
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  #9  
Old June 5th, 2015, 09:01 PM
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Check for the right CAT contacting the transmission x-mount. I had to roll up the stamped flange of the CAT a 1/2-inch or so.
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Old June 5th, 2015, 09:03 PM
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Quote:
Originally Posted by down_shift View Post
Check for the right CAT contacting the transmission x-mount. I had to roll up the stamped flange of the CAT a 1/2-inch or so.
Roll up?
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Old June 5th, 2015, 09:40 PM
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Quote:
Originally Posted by WeBeCinYa View Post
Roll up?
The stamped material that forms the CAT. It has a good inch or two excess that could be cut off. Or just grab a pair of pliers and roll up the edge in contact. 15 seconds tops.
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Old June 5th, 2015, 10:13 PM
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Quote:
Originally Posted by down_shift View Post
The stamped material that forms the CAT. It has a good inch or two excess that could be cut off. Or just grab a pair of pliers and roll up the edge in contact. 15 seconds tops.
Thanks for the tip on that Russell. I'm going to go back first thing in the morning to the shop and have them take it down and figure out the leak. Hope to have it tickless tomorrow.
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Old June 6th, 2015, 01:09 AM
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No leak. Thinking the right side CAT is lightly contacting the transmission support. No need to go to the shop. Grab some pliers, get under there and take a look. If like mine, you will see where it comes in contact.
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Old June 6th, 2015, 01:44 AM
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I still have a massive leak between the Magnaflow Y Pipe and Header connection. Reason?....The welds on the Magnaflow flange are big enough that the exhaust shop could not tighten the nut. I plan on welding or adding a 1/4" deep spacer/washer. Not saying all Magnaflows are this way, but mine definately has this problem.
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Old June 6th, 2015, 07:10 AM
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tick under load is typically an exhaust leak ime. Tend to be the manifold to head gaskets
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Old June 6th, 2015, 11:29 AM
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FWIWI had the same thing until I replaced the back half with magnaflow. The previous Borla and Magnaflow just didn't mate up well and leaked.
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Old June 6th, 2015, 02:20 PM
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Fixed!! Right side had a leak, bolts weren't tight enough. Muffler shop admitted they didn't tighten them down all the way because they were afraid of braking the studs. They tightened them down all the way and noise is gone. I also figured out that other noise, when the suspension is flexed up front, the drive shaft is touching the new exhaust. There is a little indention now in the pipe, and I'm just going to leave it alone. Now that the dent is there, the contact isn't happening.
All is well.
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  #18  
Old June 6th, 2015, 03:37 PM
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new video for comparison?
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Old June 6th, 2015, 04:23 PM
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No new video ha. And yes I wear crocs daily son. I haven't been turned on to those Ked's shoes all the dudes out west wear yet, seen below. Reminds me too much of what my mother wore when I was a kid.
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  #20  
Old June 20th, 2015, 10:30 AM
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So here is where I am disappointed with this Magnaflow Y pipe. Apparently I am getting contact when I go over a bump or hit a pothole, because the drive shaft is touching the exhaust pipe right at the O2 sensor when the suspension flexes. Luckily it's not hitting the sensor but the pipe. I am going to call Magnaflow on Monday and show them that this direct fit isn't so direct on my 90. Not sure if I should just try and bend it away or what. Thoughts? Click image for larger version

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