Manifold problem - Alfa Romeo Forum
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Manifold problem

My 156 2.0TS has started making a ticking noise from the front of the engine when started from cold. Also the exhaust sounds like it's blowing when you rev the engine. After about 30 seconds both sounds go, but the engine seems a bit gruff compared to what it was, especially when accelerating.

From searching the forum it seems that the exhauslt manifold gasket has gone (at least I hope it's that and not a cracked manifold ). I had a look having removed the heatshield and undertray, but could not pinpoint the problem, so it's booked in to my local specialist on Tuesday.

I've only had the car for a couple of months so am just going to check the warranty, but bet this is not covered .

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Re: Manifold problem

How many miles has the car covered? could be the variator on its way, is it anything like a diesal sound?
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Re: Manifold problem

The gasket between the manifold and exhaust is easy to replace - as long as you dont damage the studs / bolts.

The one between manifold and engine is NOT easy but its unlikely to be that gasket anyway.

If the manifold is cracked then this can be easily welded - mine cracked right on the joint where the downpipes meet.

You might also want to check the exhaust mounting at the join of the manifold and exhaust. This bolts to the engine block and can come loose causing vibration. There is another mounting just next to the gearbox - mine broke here which I think then caused the manifold to crack. This has a rubber mounting which on mine had melted !!

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Re: Manifold problem

Originally Posted by Pascs
You might also want to check the exhaust mounting at the join of the manifold and exhaust. This bolts to the engine block and can come loose causing vibration.
Actually they tend to split in two, easy to replace though, 10 minute job.
To answer the initial question, I'm afraid there's something cracked on Chris M's exhaust. A leaky gasket almost never stops leaking when the engine is hot, whereas a small crack will seal of when the metal expands because of the heat.

Luckily the manifold is made from steel tubing and is weldable

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