Why does my General Motors V6 engine not work?
In one case an exhaust valve rocker broke and the exhaust valve was not opening. That cylinder would fire but, on the exhaust stroke, the gas had nowhere to go and was blown past the piston and into the crankcase. This happened at highway speed. So it was with much bucking and snorting that he managed to chug home a few miles further on.
Are there problems with the GM 3.1L V6 engine?
The only “problem” block in the 3.1L V6 engine family to watch out for was the one used in some 1988-’90 FWD cars and minivans, casting #10065459. This particular casting tended to develop cracks near the center cylinders.
When do you know to change the timing chain?
A timing chain runs inside the engine, as it needs to be lubricated by the engine oil. A timing belt typically needs to be replaced between 40,000 and 100,000 miles depending on the vehicle and it’s a few hundred dollar repair. A timing chain doesn’t need to be replaced unless there is a problem with it.
Why does my GM 60° engine not start?
No starts are most often due to faults in the crank sensor circuits (there are two on most engines). In some cases, a no start or intermittent loss of spark can be caused by wiring that is chafing near the rear exhaust manifold. The DIS system has three coils that share paired cylinders (1-4, 6-3 and 2-5).
In one case an exhaust valve rocker broke and the exhaust valve was not opening. That cylinder would fire but, on the exhaust stroke, the gas had nowhere to go and was blown past the piston and into the crankcase. This happened at highway speed. So it was with much bucking and snorting that he managed to chug home a few miles further on.
Can a bad timing chain cause an engine to fail?
3. Engine won’t start or fails. A broken timing chain will cause an engine to not start or fail while driving. If the belt is already broken, the engine won’t have enough compression to start. If it breaks or jumps while driving, the pistons will be damaged from contact with the valves.
The only “problem” block in the 3.1L V6 engine family to watch out for was the one used in some 1988-’90 FWD cars and minivans, casting #10065459. This particular casting tended to develop cracks near the center cylinders.
No starts are most often due to faults in the crank sensor circuits (there are two on most engines). In some cases, a no start or intermittent loss of spark can be caused by wiring that is chafing near the rear exhaust manifold. The DIS system has three coils that share paired cylinders (1-4, 6-3 and 2-5).