[code 0420]

all three of the most common probelms have been mentioned in this thread.

 

if you dont know how to propery diagnose then you will end up "shotguning" parts at it untill its fixed. That can get rather costly.

 

A code P0420 is quite often a bad cat. the cat monitor is rather acurate.

 

It can also be triggered by strange driving conditions, one of the o2 sensors failing (usually the rear) or an exhaust leak.

 

In california the emissions waranty has to covers parts like the cat for 100K miles or 10 years. I dont know if other states are the same.

 

If the cat did fail It would be wise to determine why. does the car have a fuel/spark issue? or was the cat just damaged by a rock in the road?

 

I too have worked as a parts counterman in the past and I would like to think I helped a lot of customers fix cars. But I would trust an actual mechanic who knows how to diagnose a little bit better.

Other than the code it runs great. I can shut it off, but it does come on after a while. Last time was about 2 weeks. I'll try the rear o2 first.

[code 0420]

thanks for the information.

[code 0420]

Hi jct61765. Yikes that does sound like an expensive code! But seriously, maybe you just have an exhaust leak or something? I don't know but would maybe just replacing the rear o2 sensor would fix it, I mean how does autozone know the rear cat is bad without inspecting it?

Thats what I figured too. I'm more into Toyotas.

[code 0420]

Autozone is telling me i need a new cat. The check engine can be shut off and will stay off for like a week or more. then all of a sudden it comes on. Does anyone know if that all it is?

[Need to replace all four tires on AWD?]

 

1) Subaru says tires need to be matched within 1/4 inch of circumference. Based on what you said (2/32" of tread wear, which is the radius change), your tires would mismatch new ones by more than 12/32" (3/8") in circumference, which is 50% over the max.

 

2/32 or 1/16 of an inch is alot less than 1/4. Its still 3/16 under the 1/4 subaru calls for mismatch. He should be fine.

[What RPM's in fifth]

Thanks

[What RPM's in fifth]

I have a 96 Lagacy outback 5speed, 2.2 engine. In 5th gear at 60 my rpm's are at 2800. Is that where it should be?

[bearing dimensions anybody?]

yeah thanks jim

 

Now, for a really crazy idea. I restore brit bikes as well and many of those had twin taper roller bearings in the wheel. They also had a threaded adjuster that let you push the races nearer so that you could cancel any free play.

 

considering tha fact that the two inner parts in the subbie bearing can be separated, did anyone ever tried to grind some metal off the inner part / race to close down the free play in a subbie bearing?

 

Just asking, not saying that i'll do it.... ;-)

 

They play in the bearings may need to be there.