habitat

Hi Guys,

After a short drive, and after I've turned off my engine, I hear several clicks/ticks (continuously for a few minutes) from what I believe is the catalytic converter. I was told that this can be a normal function or a sign that the catalytic converter is busted. Can you guys shed some light on this?

Note: Car is 1993 w/ 205,000 miles on the odo. Not sure if Cats were ever changed or even if that is needed.

vwynn

iTrader: (4)

the clicks can be from the exhaust cooling down.

or could be the cat?? O_O if so.. then i guess my cats are down too

habitat

I cant with 100% certainty pin point the sound from the cats. I am as positive as one can be while sticking his head below the door jam to listen. I am pretty ignorant to this issue so I wont rule anything out.

1JZ300

iTrader: (6)

who uses cats these days???

habitat

People who want to pass smog? Or people who live in the most environmental stringent state in the WORLD, California.

Both are concerns of mine. Can someone help with the topic please?

1JZ300

iTrader: (6)

sorry......

habitat

Don't get me wrong, I didnt mean to chew you up! Just consider yourself lucky to be outside of California with the ability to have that nice engine bay day to day.

redsc400

I always thought the clicking noises were from a heat shield contracting after being superheated from driving, and was normal. both my 400 and 300 do this after driving.

TheMole

iTrader: (13)

Yea I believe it has to do with a heat shield. Ever since I had my SC it would make that same sound. It passed smog so I'm thinking the cats are still working fine.

habitat

Thanks for your input, I was going to plan out a whole new exhaust system "while I was at it" but since it seems normal, I suppose I'll save my money.

prettyjay

I have a 93 SC 300 and I am just wanted to know. How many Cats does the SC300 and SC400 have? Some people have told me both have 3 Cats and some people have told me the SC300 has just one and the SC400 has 3...Can someone clarify for me?

6SOARER

iTrader: (20)

SC300 2 catalytic converters, SC400, 3 converters.

SC400slide

iTrader: (11)

The SC400 has three cats made in California only. The third one is a Sub-catalytic converter. Most often then not, those sub cats are empty, unless sold in CAL.

prettyjay

Forgot to mention my 93 SC 300 is in California, so I am assuming it has 2 cats on there..Thanks!

Lokz

iTrader: (1)

There is one pre cat on downpipe i think and one in middle somewhere in exhaust system in sc300 and 2 resonators. Thats all i can remember from my exhaust system in 93 SC300.