Help Doubts related to Alfa 155 Q4

**Manoel Oliveira** · 26-02-15, 19:51

Originally Posted by Suzumushi

Yes that's correct, but there also online versions available

standard head gasket thickness is 1.9mm

regards

w

Thanks for the reply !! on the catalog, you know where I find the on line version?

**Suzumushi** · 26-02-15, 20:05

Originally Posted by Manoel Oliveira

Thanks for the reply !! on the catalog, you know where I find the on line version?

eper.fiatklubpolska.pl/
but sometimes it's not working

eper.fiatforum.com/
old database but has all q4 parts as a reference

but to be honest, you will not find a lot of parts that are stil available even in the italy's fiat warehouse.

regards

w

**Manoel Oliveira** · 26-02-15, 20:25

Originally Posted by Suzumushi

eper.fiatklubpolska.pl/
but sometimes it's not working

eper.fiatforum.com/
old database but has all q4 parts as a reference

but to be honest, you will not find a lot of parts that are stil available even in the italy's fiat warehouse.

regards

w

The intention was to increase the compression ratio, the fuel in Brazil has constituted 27% of alcohol, so it would be nice one 9: 1 ratio compression .... I know I will not achieve that goal just tuning the joint head, because I could see that the joint Cometic is sold in different expessuras, which the smallest thickness of such board exists and that you can use? by what I imagine the pistons do not exceed the top of the cylinder, is that right?

**Evodelta** · 07-03-15, 09:38

Originally Posted by Manoel Oliveira

The intention was to increase the compression ratio, the fuel in Brazil has constituted 27% of alcohol, so it would be nice one 9: 1 ratio compression .... I know I will not achieve that goal just tuning the joint head, because I could see that the joint Cometic is sold in different expessuras, which the smallest thickness of such board exists and that you can use? by what I imagine the pistons do not exceed the top of the cylinder, is that right?

The piston will collide with the head.
You will need forged pistons to change the CR, the old ones will break.

**Manoel Oliveira** · 07-03-15, 10:34

Originally Posted by Evodelta

The piston will collide with the head.
You will need forged pistons to change the CR, the old ones will break.

Thank you for the answer! was what I imagined, the pistons are some the 10th the top of the cylinder ...... know tell me if the pistons Type 2.0 16v that CR has most are resistant as the original Q4 pistons? In fact the Q4 pistons has a composition of special materials or pistons are common? Thank U