4.6L (1996-2004 Modular) MustangTechnical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within. Sponsored by Cruizin Concepts
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Engine tick that winds down after shut off (Video)
Hey guys, stalker here, first time poster and Im computer challenged so I hope I do all this right. Here we go, 1998 Mustang GT 66,000 miles. Noticed a tick, knock under the passenger side valve cover (sounds like). Really not sure what to make of it, rockers, lifters, exhaust leak, valve, even heard water or moisture in spark plug bays. I had recently washed engine before sound started (read, noticed). Here is what Ive done so far, added a little Marvel oil to my engine oil and gas tank. Purchased 5 30 Royal Purple to make an oil change this weekend, will be substituting a half quart of oil for a half quart of synthetic trans fluid per suggestion of trusted mechanic. (to free lifters if that's the case) The day before I noticed the tick, I had placed an order for new plugs and wires, should be in Friday. I will know then if water or moisture is an issue there. In the video you will hear the sound tapering off after the engine is cut, one mechanic seems to think that narrows it down to lifters or water/spark plugs theory, but eliminates valve. I am very interested to hear any input. This is my daily driver, Im just going easy on her at least until oil change and plugs and wires get swapped this weekend. Hopefully this is the link to the video on youtube:
No I have not taken off the covers. I was thinking that if I didn't solve it this weekend, I would have my local shop do that and take a look. Felt it was a little out of my scope of mechanic abilities. But, I guess there's no harm in pulling the cover, maybe something will jump out at me.
It sounds like something is continuing to rotate after the engine is stopped.
I would rule out any valve train , exhaust, or spark plug problems because they just wouldn't continue to rotate like that once the engine stops.
So you have to look at what can possibly rotate after the engine is stopped.
Maybe a problem with the ac clutch/or compressor. Pwr steer pump, water pump.
Try removing the belt and run the car for a short time 15 20 seconds should be enough to find out. If your noise disappears you know you have an accessory problem. If the noise continues you have to look else where. Trans? is it manual or auto?
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