Knock Knock Clatter- what do I tell my mechanic? Help!
 

Hey Guys... Just got my truck out of the shop Friday. I had the bottom bearings replaced (main and rod), new oil pump, new front main seal, and a few odds and ends. They also turned my truck's horsepower up from 330-430 split HP to fixed 470 h.p.. Engine is an N14 Cummins...

When I picked it up, it sounded "different"... a little more clatter at idle. Driving it the 125 miles home, on about 5 occasions, I got a knocking sound. Mostly when climbing hills (running empty). It would knock varying from a little to a lot, then the noise would go away. Oil pressure is fine, truck runs fine, except for this.

I had an overhead done a couple months ago. The truck ran OK when I took it in, except for the chronic low oil pressure I have had. They seem to have fixed that problem, but now a new problem! :x

I am guessing maybe an injector going bad? :shock: I am no mechanic... some of you who have ideas, please offer them! I won't be back on the computer until Monday, but will check your replies before calling the mechanic.

Thanks fellers............ 8)

An injector will usually cause the engine to miss, something like a plug fouling out on a gas engine. Another thing to check is the lifters. They can easily check to see if it is a lifter or injector. Hopefully, it isn't a lifter. They may have not done something correctly when they did the work. My guess would be that if it wasn't doing that before the work was done, then it may be related to their work. Hopefully, it will be something simple to repair.

Geez M-Flyer, there has to be a silver lining on the horizon at some point soon. I think you've had more than your share of problems. I must be headed for a blown engine.

I really hope you get a break soon!!!!!

Thanks for the kind words, fellas. Truck is back in the shop now; I took it in this afternoon and they are checking it over. It ran better on the way to the shop today, but there is still something amiss.

Anyhow..... I bought a $20,000 truck. I don't have a lot of heartburn about putting some money in it to get it running well and keep it running well. Beats the heck out of a payment on a $120,000 truck!!! 8)

Hopefully they will get it going and it will not cause any more problems for awhile. From what I can tell, the bottom bearing overhaul has helped tremendously on the problem I was having with low oil pressure. It is now running +/- 40 p.s.i. :)