Tapping noise on 147 1.6 - Alfa Romeo Forum
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(Post Link) post #1 of 4 Old 01-10-14 Thread Starter
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Tapping noise on 147 1.6

Good day all

I Have a 147 1.6 T-Spark it starts fine but after about 2 min or so it starts to sound like a diesel. The exhaust manifold does have a small crack in it but doen't sound like it could be that. It sounds like a diesel when it idles and up to about 2500-2700rpm.

If there is any one who know what it could be please let me know.
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I'm going to take a stab and say it's the inlet cam shaft variator which forms part of the VVT / cam advance system. It's a fairly commonly overlooked item when it comes to cambelt change time. it sits between the end of the inlet cam and the cam pulley so is a belt off job to replace and often generates a diesel like sound as it gets worn.

you can get service kits for them as opposed to purchasing an entire new unit but still have to remove the cambelt and variator unit in order to service it.

Previous Alfas:
1999 156 1.8TS Sport Pack 3
2001 166 3.0 V6 24V Super
2003 156 GTA 3.2 V6 24V
2005 156 1.9 JTDM-Jet Sport
2008 159 1.9 JTDM Lusso

Current Alfas:
1997 GTV 2.0TS Lusso
2001 147 1.6TS Lusso
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147ts plus bits

Certainly sounds like the variator to me.
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(Post Link) post #4 of 4 Old 02-10-14 Thread Starter
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thanks guys will have a look at it.
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