Overhead

[CAT Lover]

Got the overhead otherwise known as the Valve adjustment done over the weekend on my truck. It needed it bad, it was running very rough when cold & wouldn't warm up the right way & the fuel mileage was off. I wasn't blowing smoke.

I was way over do on my overhead. It's supposed to be done every 100,000 miles I was at exactly 148,000.

Anyway $335 bucks later for the adjustment which inculded a new valve cover gasket the truck started right up when cold, no drag on the motor & is nice & smooth (for that truck anyway). I had a new muffler put on to I was planning on instaling myself over the christmas break, but I figured since it was going in for one thing may as well do another.

It's so nice to have a smooth running quite truck again.

My mechanic told me to start doing just ol & filter changes at 5000 miles. I was doing 10,000 than 7,500 but with the miles on that motor (534,000) he wants to see them done at 5000. So I will comply.

[Mr_D]

I'd do an oil analysis and see what it tells you before going to the shorter change intervals. I did that with our ISC and found I could go longer than specified.

[CAT Lover]

I'll have one done regardless. I think at this point it's an age plus mileage issue.

the truck is a 2000 & the miles are high.

When the truck was new I used to go 15,000 miles inbetween PM's. I noticed a a couple of hundred thousand miles ago that the truck did not like lengthly oil changes intervals. It would run diffrently, rough, loud, etc,

the 3126 thrives on clean oil.

[glenn allen]

3126 and C7's can develop fuel injection problems if the engine oil is not kept clean. Not sure the engine really cares so much as the injector system. If I was going to error it would be to change it a little to often.