I am getting some noise from my Cats. I crawled under my Dico 2 and can definatly hear it coming from both of the cats. I was thinking of going with a aftermarket high flow cat. Has anyone done this? I just don;t wanna throw out $1800 for the replacement Y pipe from the dealer.

Dino

 

yeah, I did the magnaflows. You can either go to their site and find a local dealer, or order them and have you shop install them.

http://www.car-sound.com/02product/s...;cat=Discovery

Forgot to add that I like them and it was only $325 installed. Midas quoted me $425 for one OEM replaced. They wouldn't touch the other side because they couldn't tell if it was bad. No way to replace both at the same time.

 

Here is about the best spot onl line for selection and prices for cats.
http://www.completeexhaust.com/produ...roducts_id=184
Before you remove your old cats, find out what killed them, repair it and then install new ones or it will just happen all over again.

 

Ok now I am intiged. I just got this 99 Disco II last week and have spent the last week doing the mantaniece that has been missed for the last 7 years. I have changed oil, Trans, and both Diffs fluids, Sparks and wires, New caliper, new idler pullies(2), and New belt. The disco came from the beach so there is alot of salt spray on the parts. I am planning the cats, new AC compressor, and tensioner pulley. What would be a possible reason the cats are going bad, running rich? I am getting 15+ MPG right now which I thought wasn't bad for the truck.

 

Cats go bad from contamination only, be if fuel, coolant or oil.
Too bad you have already changed the plugs, they are always the first thing to look at to see how they are firing or if there was any moisture showing up.
Main causes are plugs, wires and dirty or stuck injectors along with a leaking head gasket seaping in oil or coolant to be burned off.
When you think you are all done bring it back up to specs, take a look at my list of goodies.

This is the parts list for a 60,000 mile service the way I do it.
1 Oil filter , K&N 3001
1 Air filter
1 Transmission filter kit
6 Qts of engine oil
12 Qts of ATF
7 Qts of 80/90W gear oil
2 Qts of Brake fluid
2 Qts of synthetic Power steering fluid
2 Gallons of OAT, orange coolant
1 Bottle of Lucas Power Steering additive
1 Bottle of Lucas Transmission additive
1 Can of Spray Carb Spray
1 Can Of Brake cleaner
8 Spark Plugs, I use Bosch Platium Plus 4's
1 Set of Magnacor 8mm plug wires
1 Serpentine belt if not yet replaced
2 Bottles of SeaFoam


60,000 Mile Service
Bleed the brakes
Flush and change the power steering fluid adding one bottle of additive
Service the tranny adding one bottle of additive
Flush the coolant system
Do an engine flush before changing the oil
Do an induction cleaning
Clean the throttle body
Add fuel additive to full gas tank
Change both of the diffs fluid
Change the t/case oil
Replace the plugs and wires
Replace the air filter
Lube all the drive shaft grease fitting including the 2 slip shafts
Do full inspection of brakes, hoses, bushings etc.

Hopefully I didn't leave anything out.
Mike