Yes, if the padding is worn out or about to be worn out. Other wise if the padding is still in good shape then just leave it and add the new carpet over it.
For allergy or general cleanliness health concerns the carpet should be replaced with a hard surface like wood or tile.
Moldy carpet should not be cleaned, it should be replaced. Consider that by the time the carpet has molded, the padding and underlayment have already been damaged and need to be replaced or repaired.
Only if they are bad !
Most 4 cyl. sidekicks should be replaced at 100k.
60,000 miles you should have it checked to see if it needs replacing.
Yes, replacing the heater core should slove the problem.
For outdoor carpeting, you should look for a product that contains some amount of rubber or nylon. You can find rolls of outdoor carpeting on Amazon or at your local home improvement store.
This filter is a permanent filter and should only be replaced when replacing the fuel pump.
If the filter is mounted in the fuel tank, no. It is replaced when the fuel pump is replaced. If the filter is mounted in the fuel line it should have been replaced every 50,000 miles.
At least the slave cylinder. The clutch master cylinder can be replaced at any time.
Take an old swimsuit that you dont want to use anymore and cut it into the shape of the bikini. Cut a small opening in the bikini where the padding should go and put the padding inside, you dont have to sew up the hole but i recommend doing that so your padding doesn't fall out while you are swimming. Hope this helped!
The water panel in an Aprilaire humidifier should be replaced once a year for optimal performance.