I found a crack in my exhaust manifold. Would you guys recommend a new one (single piece) or a two piece unit?

 

If your car is stock just get a oem replacement.

 

What about welding the crack shut?

Manifold with cat is expensive because Honda was stupid and made it a one piece unit.

 

just take it to an exhaust shop and get it weled...shouldnt cost more than $20

 

or find a d16y8 manifold/cat at scrap yard they usally dont crack like the y7 mani do

 

Replaced mine w/aftermarket unit from Dorman products. Mine was part# 675-512. Came with all the necc. hardware and gaskets. Cost was $125....thought that was pretty fair.....

 

Oh yeah....got it from O'Reilly Auto Parts..............shameless plug.....

 

I'm going to get an aftermarket 2 piece unit. This way if the manifold cracks, I won't have to replace the cat.

A 'y8 won't do because it's a 4-2 manifold and the 'y7 is a 4-1 manifold unless I change out more of the exhaust system.

What a stupid design by honda.

 

x2

 

Convert it to the EX exhaust manifold and be done with it!

 

x2 that set up that honda did was dumb. I agree w el vap133 just go w ex exhaust manifold just go w ex exhaust manifold

 

I removed the old manifold last night. I know that sealing the manifold to the block is critical and so I bought a new gasket.

Is there anything I should put on the gasket/block/manifold mating surfaces to help seal it???


I do intend on cleaning the block with some brake cleaner.

 

The exhaust manifold gasket is enough, once you put it back on and drive the car for about a few days, tighten up the bolts/nuts again since they tend to loosen up.

 

Thanks for the advice. I'll do just that. I installed it last night. No issues.

 

Ok, the car runs great. However, the engine light came on and it's throwing a code 67 (cat. converter), damn OBDII!

Any ideas on what might be causing this?

 

U need a new o 2

 

No he needs a cat! The secondary o2 sensor tests the function of the cat. Installing a new aftermarket header on LX and DX models eliminates the cat, hence the CEL its throwing is saying the cat function is bad.

A good way to fix this and keep it stock obd 2 is to get the cat and mid pipe from the EX model civic 96-00, but i guess in canada its called the "Si" model?

 

The aftermarket manifold had the CAT inside of it. I'm going to check for exhaust leaks around that area.

 

I have a 97 Honda civic 1.6l sohc d16y8 and I have a cracked exhaust manifold. Do I have to replace my cat. At the at the same time on that year? Is it on piece? PLEASE HELP!

 

1. You should have made a new thread

2. Your reading comprehension is lacking. This thread is for the non-vtec engine which has a 1 piece manifold and cat. You have the vtec engine which came equipped with a two piece manifold/cat, the way it should be.

I recommend going to a local junk yard and getting a used part.

 

Ok thanks a lot. Advance auto parts told me it was the d16y8 motor.

 

look under the hood, next to the exhaust manifold there's a block stamp. Reiterate what your car says right there.

while you're doing that, look at your cracked exhaust manifold. For your car, there should be a main piece that bolts to the engine. The 4 pipes should combine into 2. Then that should bolt to another piece, where the 2 pipes combine into 1. Then this piece should bolt into the cat.

you may need to take off a heat shield thingy, like 3 bolts.

infact, try and take some pictures of the crack and the whole thing. Upload them to a site like imageshack or photo bucket whatever and then link the pictures to YOUR OWN THREAD.

 

Ok thanks a lot!