Engine knock with a p0014 and p0016

[smoke624]

2004 Chevy Trailblazer LT 4x4 with the I6. approx 130,000 miles.

Friday while pulling off the light, warning indicator said check gauges, oil pressure reduced once i let out of the throttle the pressure resumed and had no other issues on the way home. Saturday morning ... started the truck with no issues on the way to work, the truck downshifted and i began to hear a tick sound.

-> Truck makes a ticking sound when on the throttle ... while running at highway speeds you can't hear it. while truck idles you cant hear it.
hand held scanner is showing P0014 and P0016.

Back ground - > Alternator replaced at 100,000
Coil Pack replaced at 103,000

all services have been up to date and on/before scheduled ...

Stopped by a mechanic shop today just to let a guy give me a second opinion and he said it sounds like rod knock.

I am out of town working for the next 6 months in salt lake city, utah. I have no other form of transportation out here. I am looking for some help and ideas on where to start. I am really hoping it's not rod knock because i cant afford the replacement engine but its not looking too good for me right now ... If anyone has experienced this or know anything that may help me out please speak up.

 

[gmcman]

How old is the oil filter? Are you using an AC PF61/ PF61E?

Based on what you are describing and not hearing the noise, I would drain the oil and catch a small amount and look for metal flakes, particularly yellowish gold in color. Also change the oil filter to the above mentioned PF61E.

I would do this at first chance to possibly avoid further damage to be on the safe side. Please report your findings as there are many things with this motor that replicate a rod knocking sound.

Also, have you been performing the oil changes yourself or a quickie lube? Also, please show us or tell us what oil filter is in there if someone else has been changing the oil other than the dealer or yourself.

 

[gmcman]

Forgot to mention your codes, not sure how the camshaft positioning would correlate to a knock but others will need to chime in on those codes. Could have issues with the exhaust cam phaser and could also point back to oil quality, etc.

Can you pull the electrical connector on the CPAS and see if there is oil in the connector? If so then it needs to be replaced.

 

[Hatchet]

Check oil ASAP. Did you have any pending codes? The camshaft sensor could be causing the fire sequence to be a little off, but you should get a misfire code at that point.

P0014 - camshaft B over advanced
P0016 - Crankshaft position Correlation Bank 1 sensor a

Could be sensors are reading a difference. Have you had any other things done. Like new computer or tune or replace either of those sensors or other major items

 

[smoke624]

Oil was changed Saturday at Jiffy Lube, on my way home after i heard the knock for the first time. I will check today when i get home what the filter is.

If true rod knock, i should find metal shavings in the oil correct?

I have had no other issues or modifications done to the truck at all other than what was described before .. I had a mechanic at work have a listen and he said he diidn;t think it was rod knock more along the lines of a bad egr valve.

I have an appointment today at the chevy dealer here in salt lake to give me the diagnosis ... we will find out for sure

May be parting out a truck if so. I only gave $3000 for the truck from family .. to me it's not worth putting another $3000 into.

 

[Sparky]

These trucks don't have EGR valves.

But the noise could be from the exhaust cam being overadvanced , making it sound odd at particular RPM ranges.

 

[Hatchet]

Based on the little I read here. Either the CAM or Crank sensor is not communicating with the computer. They are both relatively cheap. But check the CPAS electrical connector to see if oil is in there. #2 in the drawing.

http://repair.alldata.com/alldata/imagesWLinks?file=//imagebfl300n/07/15/37_gc03stns_6_05-071.png&width=618&height=553&displayType=print&imgRotation=0

since it won't let me post the image. click on the link.

 

[gmcman]

So you just heard this for the first time after leaving jiffy lube? If so call them and tell them you havent had a knock until
they serviced your vehicle, if thats true.

My money is on thick oil, or bad filter...or that they didn't realize you have a 7 quart pan.

They buy bulk oil at discount, no way they're changing mine unless I watch them open 7 bottles of synthetic.

 

[gmcman]

The passages and clearances in the cam phaser and CPAS are very tight.

 

[IllogicTC]

I'd definitely make sure 7 quarts comes out. I'm willing to bet only 5 does.

 

[smoke624]

well good knews bad news .. i know whats wrong .. bad news is its rod knocking ... why i have no idea ...chevy dealership confirmed ... so if anyone is looking for a nice set of 20" rims wrapped in some good tires or a double din cd player i have one .. truck is gonna be junked

 

[nagyiii]

how much for the double din cd?
got pics?

 

[Ed H]

Ah. That sucks man. I feel for you.

I just had the motor replaced in mine. Not fun, but much cheaper than another ride.

 

[Sparky]

Check that jiffy lube first, I can't help but wonder given some horror stories I've read and the timing being so suspicious...

Even if they are responsible it may be impossible to get them to actually do anything, but you never know.

 

[Hatchet]

Sucks. Sorry to hear. I replaced my engine as well last year because number 1 bearing decided to shred it self.

 

[smoke624]

Thanks guys i am browsing my options right now as far as what i can do. It looks to me like its gonna be easier just to get rid of the truck. i got this thing for like 2400 from family. ive got my money out of it .. talked to a dealership yesterday they are gonna give me 3000 for it with the bad motor so i am gaining money for it.

Like i said if anyone needs a nice in dash dvd player or some sweet 20 inch rims and tires feel free to contact me. I need the cash so my loss is your gain

 

[gmcman]

Man, that's a blow. Can't argue with getting some money back. Makes me think why a dealership would offer 3K knowing they need to fix it....or maybe part it out.

 

[triz]

Yeah I am surprised as well. Usually top is about 1k. Then again they may try to get him in a used vehicle with a 5-7k markup.

 

[smoke624]

anyone know how to get the knock out of this thing on a temp fix? i need it to pass across an auction block. i read somewhere that seafoam would band-aid it for a week or so. i dont really care if it blows the motor i just need it run across the auction floor (according to dealer) for 3 minutes. they will give me $3000 trade in value towards my 2010 camero ss

 

[KNBlazer]

anyone know how to get the knock out of this thing on a temp fix? i need it to pass across an auction block. i read somewhere that seafoam would band-aid it for a week or so. i dont really care if it blows the motor i just need it run across the auction floor (according to dealer) for 3 minutes. they will give me $3000 trade in value towards my 2010 camero ss

You're in the wrong Forum, most of us are honest refugees from TV.... In no way would we scam another person, especially a potential TV owner...

 

[Hatchet]

and nothing will stop the sound of a rod bouncing around on the crank.

 

[gmcman]

Did you try changing the oil yet (5W-30) with a fresh AC filter?

 

[smoke624]

truck made it to the dealer .... I now have a Chevy Camaro SS sitting in the driveway ... Thank you guys for all the help I have stock wheels in my garage if anyone needs them hit me up