i dont know if its just me or if its my truck but the motor doesnt seem to have as loud of a "knock" as what it did when i bought it about a yr ago. you can hardly hear it even wether you are in the cab or standing next to the front end. what would cause this?

 

temperature and compression- your wearing it out, mine sounds like a well oiled pump jack pumping oil. It would quit running but its a Cummins.

 

so what needs to be done to fix this then?

 

How many miles are on your truck? I've got a block I'm waiting till spring to rebuild to fix this. I've got alot of blowby, when I pressure my inter-cooler it will push out the dipstick. Its the rings. just old and tired.

 

it just rolled over 200k earlier this week... it feels like it runs good. this would prolly explain my drop in millage too...?

 

ive noticed the more timing you have the more quiet the engine runs. I noticed in your sig you dont have any timimg. i know from stock to 16.5* mine runs alot smother and more quiet than my old truck with timimg at stock. Just a thought. @ 200k i would hate to think that your engine is wearing out. unless its had poor maintence or just been run hard.

 

yeah i havent messed with the timing yet. the previous owner took good care of it. the truck has only been up here in iowa for abhout 4yrs. i work for the previous owner and when his brother lived down in texas he pulled a livestock trailer with it quite a bit and when he moved up here it one of the guys i work with used to drive it to work everyday untill i bought it. and the truck was lucky to see 60mph when he used to drive it to work...

 

i would do a compression check and see what kind of numbers you get. also check fuel pressure to make sure your still getting plenty.

 

what is good compression numbers for these trucks?

 

i would think that im still getting plenty of fuel since i can still put it to the floor in any gear and completly black out the street...