Pushrods

[gsimpson]

OK I took the pushrods out and when I look at the ends I can't for the life of me see any difference in the ends both are polished and shiny.

So I am guessing new push rods?

[Robyn]

The pushrods in the 6.5 and 6.2 have one end (ball that is hardened)and it is usually marked by the ball end being a copper color or a copper colored band around the shaft on the hard end.

Some aftermarket rods may have a paint stripe around the shaft on the hardened end.

Look carefully at the ball ends and if the rods are clean you may be able to make out the copper color.

The colored (hard) end goes to the rocker arm.

Switching these around will lead to a fast wearing out of the ball and failure of the ball end.

If you can't figure it out get a new set.

Colored ball or paint stripe goes to the rockers.

Good luck

[More Power]

You can sometimes see where the paint band was on the pushrod. The paint apparently etches in the rod a bit... even if it's all worn off now.

[Robyn]

Here is a piccy that Jim Posted back in 2013 in a discussion of pushrods

[Ike Agar]

I have some mechanical background I have a 94 model Chevrolet 6.5 turbo diesel started missing smoking blue smoke light blue blowing oil out the dipstick blowing out oil filler cap thought I heard noise on passenger side around turbo any suggestions are inputs greatly appreciated if you're interested or can help me please do so I'm willing to give my phone number I am in Chattanooga Tennessee I am new to this for him and don't know just how it works thank you my number is 423 505 2225 my name is Ike thank you for input of any kind

[Robyn]

WELCOME to TDP :):)

Any codes showing ??? (Check engine light on)

Blue smoke can be caused by a bad injector (Or set worn out)

A bad injector can cause noise too.

A bad injector can cause a knock like noise.

With the engine idling... crack open each injector line one at a time on the side with the noise and see if the noise stops and or if you find the one that does nothing (The miss)

The smoke coming from the crank case (oil filler/dip stick) does it HUFF or is it just steady stream of vapor.

A huffing pulse of smoke can mean a cracked piston or a piston with busted rings.

When things are in top shape there should be nearly zero vapor from the oil filler pipe.


Disconnect the electrical connector on the fuel shutoff solenoid (round item near the front of the injection pump.

This will prevent the engine from starting.

Crank the engine for several seconds and note the cadence of the cranking as the pistons go through their cycles.

The cadence should be an even za-za-za-za-za-za and so on

If you get an uneven cadence in the cranking it can indicate a bad cylinder (bad rings, hole in a piston )

If this is found then a compression test is in order to find the bad hole.


Good luck

Keep us posted :)

Robyn

[More Power]

Here is a piccy that Jim Posted back in 2013 in a discussion of pushrods

That's a great photo. I'd forgotten about it. Thanks for posting the link.

[Robyn]

I remembered reading that one back in the day.

Showin better than tellin :D