I've got a Chery J11 2.0L automatic built in 2011, which is the same as the Tiggo (except right hand drive for Australia).
I agree that the vehicle is a bit underpowered for aggressive overtaking, but I find that it's perfectly adequate for normal driving.
For overtaking at high speeds (we're limited to 110 in Australia), there's a couple of things I do:
First, turn off the air-con just before overtaking, as this uses maybe 10% of the engine power. This will give you a bit more power.
Second, leave a decent space behind the car you want to overtake. When an opportunity approaches for overtaking, start accelerating, so that you're already going faster than the vehicle in front before you pull out.
Only one other thing to suggest. You could maybe try premium petrol which might give better performance. I run mine on cheap 91 RON unleaded, but the manual says to use 93 RON which isn't commonly available in Western Australia. 95 RON is available, but it's more expensive, and for my kind of driving, I don't usually need the extra power. That's just something you could try - I don't know whether you would notice any difference.
SOURCE: Why doe's my car idle high and low Why doe's my chery tiggo 2.0 auto idle high and low
Try disconnecting the battery black cable for 5 minutes to reset the idle speed. Also make sure you don't have an issue with air trapped in the cooling system, did you bleed the air out?
SOURCE: torque settings for Chery Tiggo 2.0
Chery Tiggo 2.0 liter engine.
cylinder head torque sequence: 7 6 2 4 9 .......................................... 10 3 1 5 8
Is's done in 3 stages 1st stage 45 Nm......
2nd stage 90 degree turn, or a 1/4 turn......
3rd stage 90 degree turn, or a 1/4 turn.......
Camshaft bolts inlet and exhaust share the same torque settings 120 Nm
Cylinder head bolts MUST be replaced.
Main bearing cap Bolts: 1st 45Nm.......
2nd 180 degree turn, or 1/2 turn.......
Connecting Rod Bolts 1st 25Nm......
2nd 90 degree turn or 1/4 turn
Lower cylinder Block bolts 23 Nm........
Camshaft bearing cap bolts: 11Nm
SOURCE: Did the Chery Tiggo 2.0 txe bend valves when timing beld snap 2009 model
YES, if the timing belt snaps and the engine is still rotating, yes the valves bends.
It's an inteference engine.... If the belt goes and the engines looses timing, the valves bends.
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