Is this a cracked manifold?

[GeoffM]

Btw, none of those bolts came out. The top two had the heads shear off. The bottom one I cut off.

[oyajicool]

They do not appear to be cracks. You could sand down the area and see if the lines disappear or not.

[AAPOQ]

I think you're good, they kinda look like water lines from the picture. A good way to tell if they are cracks would be to start the car and see if there's a hissing noise coming from the area.

[GeoffM]

They do not appear to be cracks. You could sand down the area and see if the lines disappear or not.

I think you're good, they kinda look like water lines from the picture. A good way to tell if they are cracks would be to start the car and see if there's a hissing noise coming from the area.

I'll give those a shot. My exhaust is getting louder and louder, so I'm looking for the hole. It doesn't sound like a hiss, but it does sound louder than a hiss would be.

[Oreellyfool]

I'll give those a shot. My exhaust is getting louder and louder, so I'm looking for the hole. It doesn't sound like a hiss, but it does sound louder than a hiss would be.

Good way to find the leak, is a long hose and use it like a stethoscope. (Or buy an expensive automotive stethoscope). You can pin point a small exhaust leak pretty easy that way.

[C91BLX7]

The a1 manifolds are known to crack around the collector, there also will be carbon around it if it is a crack.

Those just look like casting defects.

[GeoffM]

The a1 manifolds are known to crack around the collector, there also will be carbon around it if it is a crack.

Those just look like casting defects.

One the top side (the one shown here)? Or on the bottom?

[NightmareCB7]

Check you flex pipe. They tend to rot out.

Heres what a bad crack looks like.

[Leung]

Now thats a crack ^^^^ and what mine looked like when i replaced it with a megan header.

[thepowderblue]

I should post a pic of my brake rotors

[cloudasc]

Op, I don't see any cracks at all.

This is how my a1 manifold looks, I got a hairline crack myself:

[Bacon]

That just looks like where the casting rust stops. Doesn't look like a crack at all. Guess it's time for an upgrade.

[GeoffM]

I sanded it off, and had the folks at a local meet check it out, no cracks.
I took it to a muffler shop, I guess I'm leaking through the flex pipe.

[Bad_dude]

I sanded it off, and had the folks at a local meet check it out, no cracks.
I took it to a muffler shop, I guess I'm leaking through the flex pipe.

How much would that cost?
Thanks.

[redlined302]

Looks to be alright to me. Take a sander to it and thatll ultimately determine if they are cracks or not.