New to this! Happy I found it I need to do a Intake Manifold Gasket change on my 2001 discovery, I am having oil and coolant leak and seems to be a common problem. I was wondering if I should put a new coil pack on when I have it all broke down? I am having a misfire for #6 and I have just under 100,000 miles. I hope just replacing spark plugs, cables, and the intake gasket will solve the problem (or does the coil pack needs to be changed out). Will be replacing the throttle boby heat plate since I have it all apart and sounds like thats going to go out at some point.

Also, I am getting a lot of sounds from the belt tensioner pulley. Can I just up a new pulley on or should I do the whole assembly? Whats common? Will also put a new blet on when doing this. My goal is to make this all into 1 project, do any of you see anything I am missing?

Since I have just under 100k I will also do the big full service at the same time.

Side note, both my keys spot working (I put new batteries in and nothing). Anyone ever have this problem?

Already put new front drive shaft, alternator, thermostat, water pump, and battery.

 

Major service is past do, might look at my major posted on a sticky at the top of this section.
Make sure to use 8 mm silicone wires like STI or Magnacor.
Yes you can buy just the pulley, might want to consider replacing all 3 of them.

 

While you are under the hood, a good time to test fuel pump pressure (the test port is under part of the intake); also look carefully at the water pump for any wobble while running with belt on. While throttle body heater plate is a cheap part, the stiff small plastic lines on the cooling system can be quite brittle and crack if distrurbed.

 

Wow, thank you. I did a major service at 60,000 on it. I was thinking doing it every 50,000 now that its getting older.

Do you think I should get a new coil pack on it when I have the it all apart or do they last for a long time?

THANK YOU!

 

Nope, every 25,000 to 30,000 miles depending on your driving habits, especially as they get older, they need more attention to keep them happy. Granted, you don't have to do the wires or drive line, if already done but do the rest, including greasing your drive shaft at least twice a year.
I wouldn't worry about the coils, if they aren't acting up, leave them alone.