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UK-POLOS.NET - THE VW Polo Forum • Power loss after cambelt change
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Power loss after cambelt change

Posted: Sun Oct 31, 2021 1:45 pm
by bigcatface
Recently I changed the cam belt on my 1.4 mk5 polo (engine CGGB) and the car is now down on power. Symptoms are pointing towards retarded timing (I had used a cam lock however I may have knocked the crank pulley?) but there is no engine warning light. Is there a funny grey zone where there could be an issue but the engine hasn't quite figured that out?

I do remember specifically there was a slight amount of play in the gear on the crank so I may have lined the belt on the wrong tooth. This may be enough to knock off timing.

Outside of this I can only think that something is too tight and is robbing power?

Any ideas would be appreciated!

Re: Power loss after cambelt change

Posted: Sun Oct 31, 2021 2:38 pm
by iichel
verify timing is correct is step 1!

Re: Power loss after cambelt change

Posted: Sun Oct 31, 2021 9:28 pm
by bigcatface
From reading around I do suspect that I could be 1 tooth out on the crank gear. Will report back when I get a chance to look