My friend's grandma has an 01 SE Vulcan that somehow got a bad valve spring. They were on their way home from a trip to Florida and somehow determined that they got a bad valve spring. Any ideas on what could have cause this??
Interesting ....what years have you seen this happen on the Ranger 3.0L? Did it happen to you?Originally posted by loveroffords@Jan 23 2004, 10:39 PM
did it happen to be #1 or#6?
have not seen this on a taurus, but have seen multiple times on ranger 3.0.
seems to always happen on cyl #1 on ranger, right under the fresh air intake for the pcv system, during cooler weather. theory is that cold air is hitting a hot valve spring, thus making it weak till it cracks. let me know which cyl it was, kinda interested, may confront ford on the problem. mmmmm i smell recall/TSB.i.e. warranty work.
A bad spring would stop one valve from opening so if it were intake the cylinder wouldn't fire and you would have a bad miss and if it were exhaust you would have a backfire because the combustion wouldn't get out of the cylinder and when the intake valve opened it would run back through the intake.Originally posted by mobiuslogic@Jan 24 2004, 01:23 AM
Does the bad valve spring cause a rattling noise at times and what feels like a loss of power when it is rattling and generally decreased gas mileage? If so, then I've got a busted one too, because I've got all those problems.
Impossible on the Taurus vulcan. The PCV is in the rear (left hand for the RWD Ranger) valve cover. There is a baffle on the valve cover to prevent the valve from sucking up oil. Also, cold air is not drawn through the valve, hot oil gasses are. The temps of the valve spring and the oil gasses should be very close.Originally posted by loveroffords@Jan 23 2004, 09:39 PM
during cooler weather. theory is that cold air is hitting a hot valve spring, thus making it weak till it cracks.