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Discussion Starter · #1 ·
Hi
Got a cracked D16W4 exhaust manifold which I think could have triggered my O2 sensor CEL light?
I cannot find a direct replacement unless I buy aftermarket SS.

Does anyone know if a D14Z4 will fit a D16W4 block?
Not bothered about possible performance loss as it’s just a daily drive.

Can anyone help or advise any other OEM manifold to replace mine with?
Cheers
Phil
 

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BATSLOMAN GIVES NO FUCKS.
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will a y8 or y7 mani bolt up?

pic of your engine
 

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Discussion Starter · #3 ·

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grind the crack, drill a hole or dremel a pit at each end of the crack, use a torch to heat the crap out of the manifold, and have someone weld it up while its hot.


Else any of the regular vtec style D series exhaust manifolds will work.

The far right picture, that will of course work, but at least you will pick up some low end torque at expense of higher rpm.
 
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Discussion Starter · #5 ·
grind the crack, drill a hole or dremel a pit at each end of the crack, use a torch to heat the crap out of the manifold, and have someone weld it up while its hot.


Else any of the regular vtec style D series exhaust manifolds will work.

The far right picture, that will of course work, but at least you will pick up some low end torque at expense of higher rpm.
grind the crack, drill a hole or dremel a pit at each end of the crack, use a torch to heat the crap out of the manifold, and have someone weld it up while its hot.


Else any of the regular vtec style D series exhaust manifolds will work.

The far right picture, that will of course work, but at least you will pick up some low end torque at expense of higher rpm.
That’s really good to know the D14Z4 will fit, means I can see if it fixes my P0135 CEL light without chucking £100 odd at new SS manifold.
Have thought about getting it welded but crack is halfway round manifold?
 

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In a pinch. welded cast iron doesnt always last. Unless it is taken to a specialist who knows which filler rod to use.

Its set up to fail due to not being the exact same material as iron.

Just be aware. the 2001+ D series will not work, if you happen across a good deal. In USA, we use the d17a1 and a2. The bottom row of bolts/studs line up, but the ports are horribly tiny
 

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Discussion Starter · #7 ·
In a pinch. welded cast iron doesnt always last. Unless it is taken to a specialist who knows which filler rod to use.

Its set up to fail due to not being the exact same material as iron.

Just be aware. the 2001+ D series will not work, if you happen across a good deal. In USA, we use the d17a1 and a2. The bottom row of bolts/studs line up, but the ports are horribly tiny
Before I buy that D14 I’ll search for d17a1 or a2
Cheers for the help, very kind of you to take time out.
 

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Do NOT use D17.

I said they are for 2001+ civics. you have a 200 or older. D16W4 is from 99-00 correct?

The D14 manifold's downpipe will need to be lengthened slightly, as just drop in, it will hit oil pan most likely.
 

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Do not buy D17, it wont bolt up. Buy any D16 one
You cannot simply claim "D16"

You need specifics, due to how honda put out the D series engines from the early 80s to late 00s


D16W4 is a 98-2001 offered engine, but it is the OLD d16 style.

I gathered compatability to the D14 he mentioned. AS that series of 1.4 liter engines ALSO crossed over 3 generations.


THIS is why it is so important to match potential manifodls to a GASKET.

Older D series has NINE (9) bolts total holding header/manifold. NEWER d series has FIVE (5) bolts holding it on.
 
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Discussion Starter · #11 ·
Hi
Yes correct, my car is a 2000 1.6 v-tec.
9 studs on the manifold.
Can’t find a D16 manifold in UK at all!
Stupid question but how would I lengthen the D14 manifold down pipe? are we talking about a half inch shim for example??
 

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See in your picture where it has 2-3 inches of piping underneath? It needs to be slightly longer before it curves under the engine.

I bet a half inch long piece would do it.

For a picture reference, perhaps finding an image of someone trying to put a d15b7 header onto a d16z6 would be an easy find. Not sure if it exist though.

You might be able to find a half inch thick piece of steel palte, and simply make a flange spacer!

I twill get you going, and you did say you didnt mind a performance difference.



How does ebay look for prices in your region? I would see about finding "d16 header" and see if a cheap option exists.
 

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Discussion Starter · #13 ·
Been looking for about 2 months for a D16 with no joy at all so they’re pretty rare !
I’ll think about the spacer, should be reasonably easy to make one up with an extra gasket. Failing that i’ll See if I can find someone to weld it for temporary fix and take it from there.
Appreciate ALL the help, you guys have been great, so thank you very much. I’ll keep you posted. This is a great forum.
Phil.
 
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