Will no rev out after running hot and shaving the heads

Tiny
CAT BROWN
  • MEMBER
  • 2012 CHEVROLET SONIC
  • AUTOMATIC
  • 40,000 MILES
The engine ran hot. We shaved the cylinder heads. Now it starts but does not rev out completely. What is the problem?
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Wednesday, September 12th, 2018 AT 4:59 AM

7 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi and thanks for using 2CarPros. Com.

When you say rev out, how high will the engine rev? By chance is the check engine light on?

Let me know.

Take care,
Joe
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Saturday, September 15th, 2018 AT 8:22 PM
Tiny
CAT BROWN
  • MEMBER
Hi Joe,

Up to 3500 rpm, and yes the check engine light is on.

Thanks,

Catherine
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Sunday, September 16th, 2018 AT 2:36 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi Catherine:
What codes are stored in the computer? I have a feeling there is an issue with the camshaft actuator system. This component advances and retards ignition timing. It can cause many issues.

Let me know.
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Sunday, September 16th, 2018 AT 7:35 PM
Tiny
CAT BROWN
  • MEMBER
We do not have a computer on hand to check the codes. We had to remove the actuators from the cams to take the cylinder head to the machine shop, to have it shaved. The cams are placed properly according to the marks. But, are the actuators placed properly? I would need the points for the actuators. Do you know how I can access this online?
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Monday, September 17th, 2018 AT 4:48 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi, I will attache the directions for removal and replacement of the timing belt. However, The most common cause for solenoid problems is dirty oil, which clogs the screen that sits between the solenoid and the pressure switch. If the solenoid does not operate, the system will remain disengaged, which will impact engine performance, fuel economy.

Without a trouble code, we cannot be sure that is the issue. Here are the directions I promised. All attached pictures correlate with these directions.

Timing Belt Replacement
Vehicle Engine, Cooling and Exhaust Engine Timing Components Timing Belt Service and Repair Removal and Replacement Timing Belt Replacement
TIMING BELT REPLACEMENT
Timing Belt Replacement

Special Tools

* EN-6333 - Timing Belt Tensioner Locking Pin

* EN-6340 - Camshaft Locking Tool

For equivalent regional tools, refer to Special Tools See: Engine > Electrical / Mechanical Repair > Special Tools.

Removal Procedure

1. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement See: Air Cleaner Housing > Removal and Replacement > Air Cleaner Assembly Replacement.

2. Remove the timing belt upper front cover. Refer to Timing Belt Upper Front Cover Replacement See: Timing Cover > Removal and Replacement > Timing Belt Upper Front Cover Replacement.

3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle See: Vehicle Lifting > Procedures > Lifting and Jacking the Vehicle.

4. Remove the front wheelhouse liner Inner front extension. Refer to Front Wheelhouse Liner Inner Front Extension Replacement.

5. Remove the drive belt tensioner. Refer to Drive Belt Tensioner Replacement See: Drive Belt Tensioner > Removal and Replacement > Drive Belt Tensioner Replacement.
6. Set crankshaft balancer in direction of engine rotation to cylinder 1 TDC of combustion stroke (1).
7. Remove the crankshaft balancer bolt (1).

8. Remove the crankshaft balancer (2). Refer to Crankshaft Balancer Replacement See: Harmonic Balancer - Crankshaft Pulley > Removal and Replacement > Crankshaft Balancer Replacement.
9. Remove the 4 lower timing belt cover bolts (2).

10. Remove the lower timing belt cover (1).
Note:
The right half of the EN-6340 - locking tool can be recognized by the lettering "right", arrow, on the tool.

11. Prepare the right half of the EN-6340 - locking tool.

1. Remove the 2 bolts (2).

2. Remove the front panel (1) from the EN-6340-right - locking tool.
12. Install EN-6340 - locking tool into the camshaft position actuator adjusters.

Note:
The spot type marking (4) on the intake camshaft adjuster does not correspond to the groove of EN-6340-left during this process but must be somewhat above as shown.

1. Install EN-6340-left - locking tool (1) in the camshaft position actuator adjusters as shown.

Note:
The spot type marking (3) on the exhaust camshaft adjuster must correspond to the groove on EN-6340-right.

2. Install EN-6340-right - locking tool (2) in the camshaft position actuator adjusters as shown.
13. Apply tension to the timing belt tensioner (2) in the direction of the arrow, using an Allen key (1).

14. Install the EN-6333 - locking pin(3).
Note:
Note the direction of the belt.

15. Remove the timing belt (1).

Installation Procedure
Note:
Threading the timing belt through the engine mount bracket is only permissible in conjunction with the assembly tool supplied with NEW timing belts or otherwise it is possible to damage the toothed belt at this stage by kinking it.

1. Install the timing belt (1).

2. Guide the timing belt past the tensioner and place it on the crankshaft sprocket wheel.

3. Place the timing belt on the exhaust and intake camshaft position actuator adjusters.
4. Apply tension to the timing belt tensioner (2) in the direction of the arrow, using an Allen key (1).

5. Remove the EN-6333 - locking pin (3).
Note:
The timing belt tensioner moves automatically to the correct position.

6. Check the timing.

Note:
Note the marking at the camshaft sprockets.

1. Turn the crankshaft 720 degrees in the direction of engine rotation by the bolt on the crankshaft balancer.

Note:
The spot type marking (4) on the intake camshaft position actuator adjuster does not correspond to the groove of EN-6340-left during this process but must be slightly above as shown.

2. Install EN-6340-left - locking tool (1) into the camshaft position actuator adjusters as shown.

Note:
The spot type marking (3) on the exhaust camshaft position actuator adjuster must correspond to the groove on EN-6340-right.

3. Install EN-6340-right - locking tool (2) into the camshaft position actuator adjusters as shown.

7. Remove the EN-6340 - locking tool.
Note:
The timing belt drive gear and oil pump housing must align.

8. Control the crankshaft balancer position.

ImageOpen In New TabZoom/Print

9. Install the lower timing belt cover (1).

Caution:
Refer to Fastener Caution See: Vehicle > Technician Safety Information > Fastener Caution.

10. Install the 4 lower timing belt cover bolts (2) and tighten to 6 Nm (53 lb in).
11. Install the crankshaft balancer (2). Refer to Crankshaft Balancer Replacement See: Harmonic Balancer - Crankshaft Pulley > Removal and Replacement > Crankshaft Balancer Replacement if necessary.

12. Install the crankshaft balancer bolt (1) and tighten to 95 Nm (70 lb ft) plus 30 degrees plus 15 degrees.

13. Install the drive belt tensioner. Refer to Drive Belt Tensioner Replacement See: Drive Belt Tensioner > Removal and Replacement > Drive Belt Tensioner Replacement.

14. Install the front wheelhouse liner Inner front extension. Refer to Front Wheelhouse Liner Inner Front Extension Replacement.

15. Install the timing belt upper front cover. Refer to Timing Belt Upper Front Cover Replacement See: Timing Cover > Removal and Replacement > Timing Belt Upper Front Cover Replacement.

16. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement See: Air Cleaner Housing > Removal and Replacement > Air Cleaner Assembly Replacement.
____________________________________

I hope this helps. Let me know. Also, I would recommend getting an inexpensive scan tool to have. They can be extremely helpful.

Take care,
Joe
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Monday, September 17th, 2018 AT 5:08 PM
Tiny
CAT BROWN
  • MEMBER
Thanks Joe, I gave my husband all that information!
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Wednesday, September 19th, 2018 AT 7:29 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
No problem. I just hope it helps.
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Wednesday, September 19th, 2018 AT 5:47 PM

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