My buddy owns a 6.5 chevy diesel and it is smokin a whitish blue smoke... Any suggestions on what it could be... Also in his ac or hvac i dont know the techinical term but he has a tickin noise when ever he turns the ignition on and it only lasts about 15 seconds.. reason for askin does anyone know what a fix could be for it also he is tryin to sell it so he wants to make it a good as he can so he can get max price so he can help his brother out... let me know please..

 

The 6.5's use a rotary style injection pump and is a known weak link on both the 6.2 and 6.5 engines.
There could be several causes for the color smoke:

1) Timing could have moved. Im not sure on the 6.5, but the 6.2 pump has two different timings. One that can be adjusted and one that is built into the pump. The pump is bolted to the block with three bolts, these can be lossened and the pump can be rotated to change timing.

2) My 6.2 blew white/blue smoke when it developed a fuel leak inside the pump. Had to tear down the pump and found some o-ring had failed internaly in the pump.

3) White/blue could also be oil. This, I would think, would be noticeable through oil consumption.

There are probably many other areas to look into, but this would be a start.
Check the timing,
Check the over-all health of the pump,
Check all the fuel and injector lines for leaks and over-all condition.

Not sure about the noise your hearing in the AC.
Sure its just not the glow plugs cycling?

Rich

 

the year would help,92-93 used a mechanical pump,94 up used the infamous electronic ds4 pump,i'd find a good diesel shop and have them check the timing first off

 

If its more white than blue and the oil is a little moist, could be a head crack..

 

Thanks for the input ill talk to him about it an see what year it is too...

 

Have him check out theDieselPlace.com - the 6.5 forum there is excellent

 

or www.thedieselpage.com 6.5l forum

 

Thanks Ill Have Him Check It Out...