*Not sure if fitting a spots cat warrants a guide as it is quite simple but thought I would do 1 any way*
I fitted a Janspeed sports cat today to my 172 (2003) and have produced a quick guide to help any 1 else thinking of doing the same. Even though it is a basic job it can take a while (took me approx 2hrs) as some of the bolts are tricky to get to and it requires 2 people.
Uninstalling the original Cat
• I started off by jacking the car up and placing the front end on axel stands.
• I then climbed under the car and unplugged the 2 wires going to the 2 sensors on the cat and then removed the sensors using a 22mm spanner (I made sure I didn’t mix up the sensors as I wanted to put them back in the same order).
• I then loosened the two 13mm nuts and bolts which connected the cat to the exhaust.
• The hard bit was to remove the 2, 10mm bolts which connected the cat to the manifold. To do this you need to get some 1 to place and hold a socket from the engine side of the bolts (remove engine cover to make access easier) while you get a socket on the other side and slowly undo the bolt (A ¼ drive ratchet is recommended as you don’t have much room and just keep going it will eventually come off).
• Once the 10mm bolts are off, fully remove the 13mm bolts from the opposite end and the cat should come off (a metal gasket should come off as well from the back of the cat).
The 10mm bolts look like this and the washers/caps should be replaced in this order.
Installing the new Sports Cat
• I then installed the 2 sensors in the new cat (in the order they came off).
• Climbed back under the car; held the cat in position with the gasket whilst loosely tightening the 13mm nuts/bolts.
• Thread the 10mm bolts from the engine side and tighten the nuts up from the underside making sure they went back in the order from the diagram.
• Tighten the 13mm nuts up at the back of the cat.
• Plugged in the sensors.
• Ran the engine and checked for leaks.
*Not sure if this is the correct/best way to do this but it worked for me
*
Take it for a test drive, Job Done!
Note - When I started the car the service light came on which I was warned could happen but after taking it for a good run it has now turned off and appears to be off for good, if it doesn’t turn off I think there is a way of turning it off through the ECU.
Some pics of my old cat and new 1, guess which is which.
I fitted a Janspeed sports cat today to my 172 (2003) and have produced a quick guide to help any 1 else thinking of doing the same. Even though it is a basic job it can take a while (took me approx 2hrs) as some of the bolts are tricky to get to and it requires 2 people.
Uninstalling the original Cat
• I started off by jacking the car up and placing the front end on axel stands.
• I then climbed under the car and unplugged the 2 wires going to the 2 sensors on the cat and then removed the sensors using a 22mm spanner (I made sure I didn’t mix up the sensors as I wanted to put them back in the same order).
• I then loosened the two 13mm nuts and bolts which connected the cat to the exhaust.
• The hard bit was to remove the 2, 10mm bolts which connected the cat to the manifold. To do this you need to get some 1 to place and hold a socket from the engine side of the bolts (remove engine cover to make access easier) while you get a socket on the other side and slowly undo the bolt (A ¼ drive ratchet is recommended as you don’t have much room and just keep going it will eventually come off).
• Once the 10mm bolts are off, fully remove the 13mm bolts from the opposite end and the cat should come off (a metal gasket should come off as well from the back of the cat).
The 10mm bolts look like this and the washers/caps should be replaced in this order.
Installing the new Sports Cat
• I then installed the 2 sensors in the new cat (in the order they came off).
• Climbed back under the car; held the cat in position with the gasket whilst loosely tightening the 13mm nuts/bolts.
• Thread the 10mm bolts from the engine side and tighten the nuts up from the underside making sure they went back in the order from the diagram.
• Tighten the 13mm nuts up at the back of the cat.
• Plugged in the sensors.
• Ran the engine and checked for leaks.
*Not sure if this is the correct/best way to do this but it worked for me
*Take it for a test drive, Job Done!
Note - When I started the car the service light came on which I was warned could happen but after taking it for a good run it has now turned off and appears to be off for good, if it doesn’t turn off I think there is a way of turning it off through the ECU.
Some pics of my old cat and new 1, guess which is which.
