Question about 2002 Chevrolet TrailBlazer

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What is the phaser on the end of the camshaft

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Cam phaser regulates the timing to make engine run leaner or richer. Bad sensor can lead to rough idling, stalling or even complete engine shut down while driving. There will be a code fault reading and that should get you a estimate on the repair cost.. Not a job you want to tackle yourself so take it to a reputable mechanic and get it replaced.

Posted on Apr 13, 2014

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Why do you refer to it as a Phaser? Maybe you should ask Captain Kirk, Mr. Spock or Scotty.

As another person said, since it's on the end of the camshaft, it's most likely a camshaft position sensor.

Posted on Apr 13, 2014

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Lifter replacement 5.4L


I must mention that engines with the DOHC emblem had a problem with "Cam Phasers". These would rattle and knock very similar to a Diesel and the noise would fade at about 2000RPM.

This engine has 2 timing chains. Since the Camshafts are on top, the lifters are under the cam. You would need to remove the cam to access the lifters. You will need to keep the cam gear positioned or lose the mark. There are cheater tools which allow you to sneak the cam gear away from the head to change the Cam phasers.

The cam phasers can then be removed. This is perhaps as much as you need done. I retired before this style of engine was built, so I can not tell you if the Camshafts can slide forward to be removed once you remove the Phasers and gear. Otherwise you are looking at a full frontal disassembly, just the Cam Phasers alone required full frontal disassembly in the original Service Manual.

You can read more about this engine and find Videos on the Web. I have an Engineering print but an assembled engine may have clearance issues. Wish I could be of more help, but you can get quite a rattle from the Phaser issues. Don't blame the wrong part.

Mar 24, 2014 | 2007 Lincoln Navigator Ultimate 4x4

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Understanding Variable Camshaft Timing (VCT)


Variable Camshaft Timing
With all of the gadgets on cars today, most of us find enough to boggle our minds inside of the passenger compartment let alone what's under the hood. Recently, many manufacturers have moved torward VCT's to improve performance, emissions and to eliminate other components. Let's start with the EGR valve or exhaust gas recirculation system. By installing a variable camshaft system on the exhaust camshaft, the manufacturers were able to eliminate the EGR valve, save money, and lower emissions.

VCT's have been installed on exhaust cams, intake cams, both cams and single overhead cams. The system is operated by using engine oil pressure to move a phaser that is mounted to the end of the camshaft and adjusts the camshaft timing while the engine is running. This is a brilliant system and the performance gained is amazing. The oil that is pressurized by the oil pump moves through oil channels to a solenoid that is controlled by the vehicles computer. The computer takes input signals from various sensors, processes the information and sends a signal to the solenoid that operates the cam phaser and in turn, adjusts the camshaft as needed.

How can I keep my variable camshaft system in good working order?
The best way to keep your VCT system is good condition is to perform regular oil changes and use a factory approved oil filter. Use of an aftermarket filter that is not factory approved can damage your engine. The material that makes up the internal portion of the filter must meet strict guidelines to assure that the material doesn't break away and enter the engines oil channels. This could block the oils path to the camshaft phaser and cause conditions such as rough running, noise and poor emissions/fuel economy. Dirty oil is a VCT's worse enemy. A few dollars extra can save thousands in repairs.

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2 Answers

Obd code p0014 on isuzu ascender 2006


Its a cam over-retarded code.

I believe this is a rebranded chevy trailblazer. I would start with an exhaust cam actuator which is located right next to the power steering pump. 90% of the time this will fix the problem. If it does not than it is possible there is an issue with the timing chain or a PCM issue.

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1 Answer

Camshaft to far retorted on bank one


Depending on the series of engine in your car, it may have part called a Cam Phaser. There have been recalls on the bigger V-8 adaptations of this part but the problems that occur are identical.

What happens is each side of the engine uses a timing chain for the Camshaft. The Phaser allows for adjustment independently for each timing chain and this causes problems when one side adjusts differently than the other. Both sides are suppose to work equally using oil pressure to expand or contract the part.

Now it is possible to have a chain tensioner spring become weaker on one side of the motor than the other, just as one of the two timing chains can stretch to different lengths.

You might check with Ford Parts to see if there is a super strength desludger for the oil to try to dissolve the sludge instead of opening the engine. If you can get the Phaser to retract to its correct position, things may pass. It sounds like the Phaser is hanging up and not advancing smoothly or the timing chain is stretched on one bank.

Please rate my info.

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1 Answer

Location 2004 egr valve on chey colardo


Doesn't have one , not needed with Camshaft Actuator System
The camshaft position (CMP) actuator system is used for a variety of engine performance enhancements. These enhancements include lower emission output through exhaust gas recirculation (EGR) control, a wider engine torque range, improved gas millage, and improved engine idle stability. The CMP actuator system accomplishes this by controlling the amount of intake and exhaust valve overlap.
The camshaft position (CMP) actuator system is controlled by the powertrain control module (PCM). The PCM sends a pulse width modulated 12-volt signal to a CMP actuator solenoid in order to control the amount of engine oil flow to a Cam Phaser passage. There are 2 different passages for oil to flow through, a passage for cam advance and a passage for cam retard. The Cam Phaser is attached to a camshaft and is hydraulically operated in order to change the angle of the camshaft relative to crankshaft position (CKP). Engine oil pressure (EOP), viscosity, temperature and engine oil level can have an adverse affect on Cam Phaser performance. The PCM calculates the optimum cam position through the following inputs:

Jan 06, 2013 | 2004 Chevrolet Colorado

1 Answer

Camshaft censer are there two are macanic said they are not working


Yes, your 2004 Nissan Quest is equipped with 2 camshaft position sensors. If your computer is setting OBD fault codes for BOTH sensors, it is HIGHLY UNLIKELY that both of your cam sensors are bad. You most likely have a timing issue like a broken timing chain guide or camshaft phaser (IVT) that is not functioning properly.

Jan 19, 2012 | 2004 Nissan Quest

1 Answer

Changed the timing belt and camshaft sensor on a 2005 pt crusier pretty sure its timed correctly because the car seems to run fine and revs high with no problems although it still throws P0016 code even...


What the P0016 code means. P0016 is the OBD-II generic code indicating that the camshaft position sensor for bank 1 does not correlate to the signal from the crankshaft position sensor. The camshaft timing is out of position due to the timing chain jumped teeth. The camshaft phaser is out of position due to problems with phaser.

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2 Answers

What dose a cam phaser sound like and wear dose the sound come form . on a 2005 ford f150 fx4


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1 Answer

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would not recomend using aftermarket. U probably cant find on anywas. I dont think cadilac would have licenced anyone to produce it for aftermarket. Go to the dealer and fork over the cash.

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