Sludge

[Cody Forbes]

The FSI is the early one with a timing belt, TSI is the later one with a timing chain, but I think that the A4 never got the TSI. They skipped it and went straight to the Valvelift which is a development of the TSI. That happened with the B8 chassis; AFAIK all B7 are FSI. 

VAG has extended the engine warranty for the cam follower problem to 110,000 miles due to the severity. Call you dealer to see if your VIN is eligible.

-Cody Forbes (mobile)

On May 30, 2013, at 2:14 PM, Bill Janssen <janssen at parc.com> wrote:

> Cody Forbes <cody at 5000tq.com> wrote:
> 
>> Second, the FSI engines have a problem where the flat-tappet cam
>> follower that drives the mechanical fuel pump wears out quickly. Left
>> unchecked the tappet wears through which lets the fuel pump piston
>> contact the cam resulting in the destruction of the fuel pump and the
>> cam. Replacing the follower at regular intervals (20,000-30,000 miles)
>> is easy and prevents issues. There are options to replace the flat
>> tappet with a roller follower, which is how VAG solved it on TSI
>> engines too.
> 
> So, how to know if your car has this problem?  I've got a 2007 A4
> quattro with a 2.0T, but is it an FSI, TFSI, TSI...  what?
> 
> Bill