New Y Pipe or just Cat for 2004 Disco II
#11
If plugs and wires have never been changed I would change them. You're going to have to pull the upper intake off of the engine to change the wires so while you're at it I would also change the coils just to be safe. The cheap coils from eBay work just fine in my experience. You'll need 2. discovery 2 coil | eBay
As far as spark plugs, I personally like NGK. Some people stay stick with Champion and those work just fine. Others say go with the Bosch Platinum and those people don't know how bad Bosch spark plugs are. Frankly, even whatever the store brand is are probably fine, but NGK is just my preference. I've used them for years all the way back to changing spark plugs as a kid with my grandfather and they've never caused me a lick of trouble.
Wires, there are several options. I forget which brand is cheapest but the 8mm plug wires are best. They won't fit back in the factory holders on the side of the valve covers, though. You'll have to zip tie them together and off of the exhaust manifolds.
As far as spark plugs, I personally like NGK. Some people stay stick with Champion and those work just fine. Others say go with the Bosch Platinum and those people don't know how bad Bosch spark plugs are. Frankly, even whatever the store brand is are probably fine, but NGK is just my preference. I've used them for years all the way back to changing spark plugs as a kid with my grandfather and they've never caused me a lick of trouble.
Wires, there are several options. I forget which brand is cheapest but the 8mm plug wires are best. They won't fit back in the factory holders on the side of the valve covers, though. You'll have to zip tie them together and off of the exhaust manifolds.
#12
#13
#15
Ok. Will check the wires and plugs tonight to make sure they're clean and fitting snuggly. Should I replace the plugs as a safe measure? The previous owner kept most of his paperwork and I can't see anything about new plugs. He got new gaskets at 86k and cylinder head kit 3 years ago. Other than that it's been oil change and coolant flush.
That's good to know. I will start looking at a new one for after I get the misfire issue is solved.
That's good to know. I will start looking at a new one for after I get the misfire issue is solved.
Last edited by chubbs878; 02-28-2017 at 09:50 PM.
#16
for federal emissions, all the magnaflow y pipes are compliant. Hell they all use the same y pipe. You can even check rock auto if you don't want magnaflow. I just went with them personally BC I have had better experience with their cats compared to other manufacturers.
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