prelube after oil change. - TCCoA Forums
 
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post #1 of 10 (permalink) Old 07-19-2003, 08:21 PM Thread Starter
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prelube after oil change.

I just changed the oil again today, and have been thinking about something.

I use mobil1 oil, and motorcraft filters.

After you change the oil, the first time I start it up the motor will knock like crazy for about 2 seconds until the oil starts flowing.

This totally makes me nuts. Am I hurting anything, or just worrying about nothing?

I was thinking of filling the new oil filter up with oil before I installed it. On a car with a somewhat "normal" oil filter location, this would be easy to do without spilling it all over. But it isn't going to happen on a 4.6.

Any ideas or thoughts on this subject?
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post #2 of 10 (permalink) Old 07-19-2003, 08:33 PM
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JustinH,

If you are really concerned about this, and don't want to chance spinning things with no lube (probably not a good thing for the bearings), you can treat it like a new motor, and "prime" the oiling system. What you could do, is disconnect the coil wires (or anything else that will stop the motor from running, but allow it to crank) and turn the key. You will need to crank it for about 3 - 15 second runs to get oil back everywhere it should be.

It's similar to what a lot of people do when they are starting a new motor for the first time. I use the oil pump drive that goes in place of the distributor (obviously not on a 4.6), then, since the distributor has to be installed and set in place, I crank a few times with the coil wire off to ensure I have oil pressure before I go into the starting cranks. Sounds like a pain, but I've never scorched a bearing or burned up a cam.

Hope this helps.

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post #3 of 10 (permalink) Old 07-19-2003, 08:46 PM
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What I hear is lifter noise from the cam followers till they pump up again...this is common on most modular engines, as I've had 3 do the exact same thing to a greater or lesser degree, and my friends do it too... I don't think it hurts anything all that much... LOL ..
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post #4 of 10 (permalink) Old 07-20-2003, 07:05 AM
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Pull the fuel pump fuse and crank it till oil pressure comes up. Then put fuse back in and start it normally.
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post #5 of 10 (permalink) Old 07-20-2003, 07:26 AM
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Quote:
Originally posted by Blown94SC
Pull the fuel pump fuse and crank it till oil pressure comes up. Then put fuse back in and start it normally.
Thanks Blown94SC: I knew there had to be an easier way than pulling eight wires! Sometimes I miss older engines with pushrods, distributors and carburetors

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post #6 of 10 (permalink) Old 07-20-2003, 05:52 PM
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No Problem. I have done this for years and works great. Frankly I would not like to go back to carbs as they are a pain in the butt...
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post #7 of 10 (permalink) Old 07-20-2003, 07:47 PM
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even easier....just floor the gas, and try to start the car. It will just crank.




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post #8 of 10 (permalink) Old 07-20-2003, 09:17 PM
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Quote:
Originally posted by JustinH
I just changed the oil again today, and have been thinking about something.

I use mobil1 oil, and motorcraft filters.

After you change the oil, the first time I start it up the motor will knock like crazy for about 2 seconds until the oil starts flowing.

This totally makes me nuts. Am I hurting anything, or just worrying about nothing?

I was thinking of filling the new oil filter up with oil before I installed it. On a car with a somewhat "normal" oil filter location, this would be easy to do without spilling it all over. But it isn't going to happen on a 4.6.

Any ideas or thoughts on this subject?
Try this next time..
Partially fill the filter with oil when you first start the oil change.By the time you get around to the filter,the majority of the oil will be absorbed into the filter media,and will not spill over really bad when installed.
I've never spun the engine over to get pressure up after an oil change,and you saw what my engine looked like after 215K miles..
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post #9 of 10 (permalink) Old 07-21-2003, 07:30 AM
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Thumbs up

I do the same thing on my mark, I pull the fuel pump fuse and crank it over a few times. Seems to work good.
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post #10 of 10 (permalink) Old 07-21-2003, 08:05 AM
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Quote:
even easier....just floor the gas, and try to start the car. It will just crank.
That's right. Also, isn't that the procedure to start a flooded engine.

If I'm remembering my EEC functions correctly: if you are in crank mode and the TPS sensor is at WOT, the EEC does not fire the injectors (but does fire the plugs)

Someone correct me if I'm wrong.

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