Basically the divided part is missing a section and it looks like its eroding away.

 

is it a cheapo manifold? If it is porosity in the casting/making process could lead to air pockets eroding and eating away the metal when super heated.

 

Who made the manifold? That is a very hot area in the exhaust. That is going to be the main point of heat buildup. Just like the wear and cracking in the stock turbo manifold.

Material quality is going to be a factor in longevity of exhaust components too.

 

Looks like a greddy t78 manifold to me..... And yes, I've seen it happen quite a few times before.

-J

 

Mine started to erode and I noticed it when my gasket blew up. I remachined the whole face so it wouldn't eat away at the center.

thewird

 

how often does something like this happen with divided manifolds? granted, if this is a greddy manifold...shouldn't we the consumer assume that a reputable brand such as greddy/trust/gracer would market higher quality parts than this?

with that being said...who knows of what other manifolds tend to breakdown in this format? im in the middle of organizing my parts list for my 13B-REW build and have been doing rather extensive research on divided housings in comparison with v-band manifolds. if this ends up to be a common occurance with heat cycle failure, i'll be in the market for a v-band setup for sure.

 

It is a greddy manifold.

I'm planning on either replacing the flange with a non-divided or just cutting the rest of the divide out of this flange. The manifold isn't divided, only the turbo, so there really isn't a good way to go about it.

 

You might want to check the exhaust wheel of the turbo, that metal had to leave out the exhaust side.

 

That's mainly why it happened. Usually from what we've seen here on manifolds that come back four, five, six, years later is those that are treated to lean conditions more often seem to show signs of wear. That or if the gasket became a issue as stated above. We just repair if needed. By signs of wear I mean small cracks or a waviness. Yours is because you stuck a divided flange on a collected manifold. It is taking the brunt of the exhaust on it's face.

Your solution is to run a non divided flange, then C-cut the housings divider. The other thing you could do is run another divided flange and C-cut the new flange itself and let it take the brunt again. That said the housing will hold up a bit better, ie not erode away as quickly if at all. Do NOT knife edge the divider that will cause it to crack.

 

What do you mean by "c cut?"

 

aahhh...being up during grave yard, i missed the little details.

 

As stated, that divided flange is eroding because the manifold itself isn't truely divided. Same thing happens when people place a divided turbine housing on a collected/non divided manifold. The center divider starts to erode away.

~Mike...........

 

Just notch out the divider like a C or half circle this will help keep it from eroding as well as balance flow a bit as it enters the T/h.

 

Is that a divided flange on a non-divided manifold? What's the point?