Knock, Knock
Thread Starter
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Tuned
Joined: Aug 2007
Posts: 321
Likes: 1
From: Tulsa, Oklahoma
Knock, Knock
This is no joke, but my 1988 351 engine knocks when I first start it up cold for about 5-8 seconds and then quites down.
It makes no noise when started warm.
I am running Castrol 10W-40 "High Mileage" oil right now and purchased a bottle of Slick 50, does anyone have any better ideas than the Slick 50 ??
I assume this noise are the Piston rods and is this normal noise and anything to be worried about ??
It makes no noise when started warm.
I am running Castrol 10W-40 "High Mileage" oil right now and purchased a bottle of Slick 50, does anyone have any better ideas than the Slick 50 ??
I assume this noise are the Piston rods and is this normal noise and anything to be worried about ??
Senior User
Joined: Nov 2006
Posts: 418
Likes: 0
From: Quad Cities, IA
Is it a "bang" sort of knock like a hammer smacking the side of the engine, or is it more of a "tink" kind of knock, like someone using a large screwdriver to smack it?
Since it goes away after a few seconds and doesn't do it warm, I would think away from the pistons and more along the lines of a lifter tapping, or possibly a rocker arm. There are other options, but those are the most common.
Since it goes away after a few seconds and doesn't do it warm, I would think away from the pistons and more along the lines of a lifter tapping, or possibly a rocker arm. There are other options, but those are the most common.
Posting Guru
Joined: Apr 2005
Posts: 2,246
Likes: 2
From: Hawkeye Country
I used frams when I first bought my 82 F100. The engine would tick loudly for a few seconds after startup.
According to quite a few people fram filters are junk, the small check valves can get stuck open allowing oil to flow down from the top end of the engine when its shut off, resulting in a dry top end when you start the engine the next morning.
I switched to a motorcraft filter and all was fine, this was on a 300 I6 with 220,000 miles.
According to quite a few people fram filters are junk, the small check valves can get stuck open allowing oil to flow down from the top end of the engine when its shut off, resulting in a dry top end when you start the engine the next morning.
I switched to a motorcraft filter and all was fine, this was on a 300 I6 with 220,000 miles.
Last edited by IB Tim; Nov 19, 2007 at 03:40 PM.
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Tuned
Joined: Aug 2007
Posts: 321
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From: Tulsa, Oklahoma
It is closer to banging sound, though not quite that bad.
I was actually told by a mechanic friend not to use a fram oil filter on this specific engine
because of oil pressure problems. Don't remember what I used !
I was actually told by a mechanic friend not to use a fram oil filter on this specific engine
because of oil pressure problems. Don't remember what I used !
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FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
The fram filters found at many parts houses have a very poor check valve assembly that will allow all the oil to drain from the motor overnight. On startup it will take some time for the pump to prime all the lifters again. Simply swapping to a motorcraft FL1A will eliminate these colt start rattles. I have seen this first hand on my trucks, and on our Subaru that I recently did an oil change on. I used a Fram filter because it was all I could find at the time, and now it rattles on cold starts for a few seconds.. something it doesn't do with the Subaru filters.
Elder User
Joined: Sep 2005
Posts: 841
Likes: 0
From: Orangeville, Ontario
You didn't say how cold it is.. I used to have an issue with cold starts and I used some lucas oil stabilizer and it solved it. It also helps that now I don't plan on putting her through winter again. Maybe she decided to love me for that? Lol.
Thread Starter
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Tuned
Joined: Aug 2007
Posts: 321
Likes: 1
From: Tulsa, Oklahoma
Here in Oklahoma, it is 40 degrees one day and 70 the next, but it does seem to get louder when it is colder and I plan on driving her when we get snow on the ground which is why I bought her.
Is the Lucas better than the Slick 50, as I have not put the Slick in yet ?
Is the Lucas better than the Slick 50, as I have not put the Slick in yet ?
Senior User
Joined: Mar 2007
Posts: 279
Likes: 0
From: Vineland, New Jersey
Try putting a bottle of Lucas Oil Stabilizer in your engine. That stuff is super thick and will stick to everything inside the engine....keeping it lubed up so no dry starts!
Last edited by ACarbone624; Nov 19, 2007 at 11:21 AM.