Hey there, my fabia is a bit laggy and well rather noisy on the tappets especially when cold and im confused because people say they are hydrolic but there is a locking and adjusting nut there and i just wondered if you can adjust them and if any one knows what the clearances are ?

Cheers

Rob

They are indeed hydraulic, the lifter runs onto of the camshaft. The rocker at the top doesn't have a clearance just a preload to let the lifter do it's work.

If it's rattling it's more than likely the timing chain..

no it's definetly the tappets could the hydrolic lifters be shot because i have changed the timing chain about 15,000 miles ago along with the thermostat and water pump

Edited 7 June, 201114 yr by robodrummer

No worries i have sorted it somone have probably played about with the tappets before i had the car i re adjusted them and it now runs like a dream and fuel economy is back up

In case anyone else has this problem this is how you do it

1. loosen lock nut

2. adjust it until it's kissing the valve stem

3. turn a further two times

4. lock the locknut

and it's really that simple it's in the haynes manual but explained a lot more complicated than that

Obviously you have to have the valve in the right position before you adjust it

Might have had the head off and skimmed and they didnt reset them after.

yeah probably works well now looking to get a new skoda soon though

No worries i have sorted it somone have probably played about with the tappets before i had the car i re adjusted them and it now runs like a dream and fuel economy is back up

In case anyone else has this problem this is how you do it

1. loosen lock nut

2. adjust it until it's kissing the valve stem

3. turn a further two times

4. lock the locknut

and it's really that simple it's in the haynes manual but explained a lot more complicated than that

I did this today .. with 2 full turns the valve opens!!

On 09/11/2012 at 16:52, waool1988 said:

I did this today .. with 2 full turns the valve opens!!

 

Old thread I know, but for general info for anyone else, I can confirm that you have to leave the lifters to settle for at least 90 mins to allow the excess oil to bleed out of the lifters after adjusting the preload on the valves of each separate cylinder. Make the adjustment on the two valves and then let it sit without moving the crankshaft. Then go onto the next cylinder in the sequence until all are completed.

 

I guess it would be a lot quicker to do it on a warm engine but it's really supposed to be cold when setting the preload.