Replacement Diesel Exhaust Manifold

Helloo,

Looking for a replacment exhaust manifold for my 2.25 diesel. Can't find one anywhere without quite bad damage to the threads. Anyone got any ideas where I can get one? I found a 2.5 n.a. defender one online but unsure if that will fit. Have read they have a larger diameter exhaust bore. No problems getting a custom exhaust made up if it's only the exhaust that won't fit, just aslong as it mounts to the block.

Any help much appreciated.

Thanks

One way to check would be to buy the exhaust gasket for both the 22.5 and 2.5 and compare them.
Edit I looked up part number ETC5312 and it has been superceded by the one in lr series web link fits both engines, so as long as it fits inside your inlet manifold shoukld be ok.
http://www.lrseries.com/shop/produc...ST-MANIFOLD-GASKET.html?search=etc5312&page=1

Can you fix the threads? Drill out the studs and put new ones in?

There should only be three studs to change at the exhaust end. I ended up drilling them out and fitting stainless nuts and bolts. Works fine even if a bit more of a faff to fit the exhaust. Luckily that was stainless anorl so won’t be doing it very often.

When I'm in Compo with engine idling there is a strong exhaust smell in the cab, can't find where it's coming from but I'd rather be gassed than tackle them exhaust bolts.

Col

Oh and try as I might, there is no way I could weld the manifold. I even got it red hot with a torch before hand but the iron just spits all over the place.

Bobsticle said:

Oh and try as I might, there is no way I could weld the manifold. I even got it red hot with a torch before hand but the iron just spits all over the place.

Click to expand...

Could it be brazed?

Col

Diitto re brazing, I've seen some done. I've also had cast iron welded - but only found one person who could do it and he's probably retired. He muffle welded it (ie in an oven) and used some fancy rods but it was a great job, he welded the flange back on a motorcycle cylinder and it lasted so its a case of finding the person who knows how to do it.

Colthebrummie said:

Could it be brazed?

Col

Click to expand...

Possibly.
I got all the gear ready to change the studs on mine but the old ones wouldn’t budge. As usual they eventually snapped off so to get it back on the road that day I tried welding some stainless bolts into the drilled out holes. I tried stainless welding rods as these worked on other cast iron I had tried and like I said even tried heating the casting.
Eventually I just put bolts through. It worked.

Tap new threads? Cast iron taps nicely.

I bought a 2.5n/d exh manifold some years ago as I knew the 2.25 was hard to come by.
Is in my garage as a spare in case I ever need it.
Far as I can see the only difference is there the down-pipe fits in...the 2.25 had a bevel...the 2.5 is squ...I'm sure I can get around that if needed.

I could take some pics of it for you...and I prob have an exh gasket to see if it lines up...I'm sure I would have tried that years ago when I bought it but I cant remember.

Your old one...just drill it and fit nuts bolts....brazing will melt if you get the exh really hot...ask me how I know.

P.S. what they selling the 2.5d type for now.

Nick in Cheshire.

Are the petrol and diesel exhaust manifolds the same on a 2 1/4?

I dont think so.

Aren't the petrol manifolds combined with the inlet manifolds?

Col

Thanks for the responses! Apolgies for the delay getting back. After reading this I bought a new 2.5na manifold for and seems decent enough quality. Mounts no problems . Thanks the help. Great forum

How did you go on getting it to mate to the tapered 2.25 exhaust flange on its end.

I've not got that far yet . Guy few doors down going to make me an exhaust so that's a worry for him

I bought mine a few years ago when I heard the 2.25d were in short supply....got it just in case.
Dont suppose I will ever use it but its there just in case.

My old 2.25d exh manifold is now on my 200di still earning its keep.