i30 Owners Club

THE GARAGE (SERVICE, MAINTENANCE & REPAIR) => PETROL => Topic started by: bobey99 on May 26, 2023, 16:41:42

Title: 2010 G4FA Timing Chain - Exhaust camshaft or Intake camshaft
Post by: bobey99 on May 26, 2023, 16:41:42

Hi All, my first post, be gentle lol

I've a question regarding the Timing Chain jumped/skipped tooth.
When this happens does the timing chain usually skip on the 1 camshaft?
ie. does it always skip a tooth or 2 on the Exhaust camshaft or would it skip on the Intake camshaft, or can it be a mixture of both?
Thanks in advance.

Title: Re: 2010 G4FA Timing Chain - Exhaust camshaft or Intake camshaft
Post by: Aye30 on May 27, 2023, 02:10:00

I had a 2011 i20 1.4l, the crank sprocket pulls down on the intake cam sprocket, with a fixed guide plate. The chain pulls from the intake sprocket to the exhaust sprocket. The tensioner guide plate  is between the crank sprocket and the exhaust sporcket. Loss of tension at the guide tensioner can result of the exhaust cam slip, however there is a gap of unsupported chain between the exhaust and intake cam. So it could be possible to jump there as well. My 2011 had the first gen timing chain and tensioner, I started getting the rattle on startup and was down on power. I didn't see if it was out of time when the chain got replaced for the thicker one, but I know the tensioner was  not doing its job properly. Even without oil pressure behind it the new tensioner was a lot stronger.