6.5 engine back pressure
#1
10-30-2012, 01:40 PM
6.5 engine back pressure
Hello all, I am a newbie. Please forgive me now. I have a 94 chevy blazer with a 6.5. 134k miles. NEW project so I dont have all the history.MY question is while this engine is running ,there is smoke coming out of the dip stick hole. Is this a indicater of worn,collapsed rings, or the vacuum pump not working? It runs rough, some white some. Like I said it is new project. Any ideas, checks I can make. Thank you jeff
Last edited by jeff3869; 10-30-2012 at 01:47 PM.
#2
10-30-2012, 05:06 PM
The CDR or "tuna can" is meant to maintain a vacuum on the crankcase from the turbo drawing the vapors out.
Replacing the CDR with what most parts stores call a PVC valve often solves the problem unless there is sever engine damage.
The CDR can also be cleaned if done so properly,google "6.5 diesel CDR cleaning procedure".
Replacing the CDR with what most parts stores call a PVC valve often solves the problem unless there is sever engine damage.
The CDR can also be cleaned if done so properly,google "6.5 diesel CDR cleaning procedure".
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