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· Registered
2012, Astra J, A14NET
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6 Posts
Discussion Starter · #1 ·
Hi everybody
This Astra J is my 1st-ever GM car, out of 38. It was given to me with a blown engine, so I opened it up, burnt No.2 piston and exh valve.... so, in went new pistons & bigends, std all, all 16 valves & stem seals, front crank seal (didn't remove the engine from the car), new cam cover as I'd heard the valve conks in and this car was smoking really bad, exhaust was flooded with oil and the engine bay was a mess. So, after I put in a new battery I cranked it up and it started ok but ran rough, so I fiddled around a bit, downloaded a 76few photos of the timing tool and set the vanos discs as near as I can and it runs beautifully, quiet, starts a tick of the key..... but just no power!
Before you say anything, I bought a timing tool kit online..... 2 months ago and still waiting!!!! Grrrrrr.... I know the timing is more than 90% close, even when it was way out and the engine cut out often but started easy enough, it still had this lack of power, oh yes... the previous owner had a new turbo fitted just before the motor blew so I've checked it and it's fine. It actually feels as if I have left a wiring connector off someplace dark and secret. I have tried litening for air leaks, can't hear any. Any ideas?
 

· The Nuclear Option
Joined
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5,881 Posts
Hi everybody
This Astra J is my 1st-ever GM car, out of 38. It was given to me with a blown engine, so I opened it up, burnt No.2 piston and exh valve.... so, in went new pistons & bigends, std all, all 16 valves & stem seals, front crank seal (didn't remove the engine from the car), new cam cover as I'd heard the valve conks in and this car was smoking really bad, exhaust was flooded with oil and the engine bay was a mess. So, after I put in a new battery I cranked it up and it started ok but ran rough, so I fiddled around a bit, downloaded a 76few photos of the timing tool and set the vanos discs as near as I can and it runs beautifully, quiet, starts a tick of the key..... but just no power!
Before you say anything, I bought a timing tool kit online..... 2 months ago and still waiting!!!! Grrrrrr.... I know the timing is more than 90% close, even when it was way out and the engine cut out often but started easy enough, it still had this lack of power, oh yes... the previous owner had a new turbo fitted just before the motor blew so I've checked it and it's fine. It actually feels as if I have left a wiring connector off someplace dark and secret. I have tried litening for air leaks, can't hear any. Any ideas?
90% close isn't good enough. That's 36 degrees off! You absolutely need a timing tool set to time the engine correctly.

The VVT can't adjust for bad mechanical timing.
 

· Registered
2012, Astra J, A14NET
Joined
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6 Posts
Discussion Starter · #3 ·
I agree 100% (lol). When I daid 90%, it's actually barely 1 or 2 deg out. Even so, I can hear the turbo but it doesn't register as power on the road, as if there's no turbo fitted. I suspect something else like the throttle body, the engine light is on..... but yes, I omow, with the timing not 100% it will theow out error codes all over the place. Problem is, I'm way up on the Namibia birder where the Orang river enters the Atlantic, it takes time to get stuff here and I need to travel long distance from the 16th..... eish!
 

· Registered
2016 Cruze Limited
Joined
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35 Posts
I agree 100% (lol). When I daid 90%, it's actually barely 1 or 2 deg out. Even so, I can hear the turbo but it doesn't register as power on the road, as if there's no turbo fitted. I suspect something else like the throttle body, the engine light is on..... but yes, I omow, with the timing not 100% it will theow out error codes all over the place. Problem is, I'm way up on the Namibia birder where the Orang river enters the Atlantic, it takes time to get stuff here and I need to travel long distance from the 16th..... eish!
If you can hear the turbo, but you don't feel an increase in torque, you probably have a boost leak. Had this happen on my GTI a few weeks ago, charge pipe popped off my FMIC, and it was suddenly driving like a NA car with a lot of whooshing.
 
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