F-1 engine troubles
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Welder User
Joined: Feb 2009
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From: northwest MT
F-1 engine troubles
I'm pretty bummed.......I had to park my F-1 due to a lower end noise in the engine. Not sure what the problem is, but when I drained the oil I had a lot of "sparkles" in the bottom of the pan. It still runs good and has good oil pressure ????
So the flatty will be coming out to see what the problem is. I built this engine 15-20 years ago when I was first starting the truck project, so I don't remember many details. So for peace of mind I will be starting over. The bummer is I don't have time or shop space to tear into it right now.....
I was planning on driving it to Speed Week at the Bonneville salt flats in Utah in August. Still may go, but the truck won't. Oh well....
So the flatty will be coming out to see what the problem is. I built this engine 15-20 years ago when I was first starting the truck project, so I don't remember many details. So for peace of mind I will be starting over. The bummer is I don't have time or shop space to tear into it right now.....
I was planning on driving it to Speed Week at the Bonneville salt flats in Utah in August. Still may go, but the truck won't. Oh well....
Refyred
Joined: Feb 2010
Posts: 2,083
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From: Southern Nevada
I was planning on driving it to Speed Week at the Bonneville salt flats in Utah in August. Still may go, but the truck won't. Oh well...
Hopefully you caught it before any major damage was done. I know nothing of Flatties, but what could it be, that you would still have good pressure? Is the noise a knock or squeal ?
Fleet Owner
Joined: Jul 2004
Posts: 27,290
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From: NM
What a shame! But don't throw in the towel just yet. When does the noise occur? All the time. when the clutch is in, under load, etc?
Sparkles are usually bearing babbit, if it still runs good and has good pressure (on a real gauge?), Id suspect the thrust bearing (rear main). You can check that by watching the front crank pulley while the clutch is depressed. You can also drop the pan with the engine in.
Sparkles are usually bearing babbit, if it still runs good and has good pressure (on a real gauge?), Id suspect the thrust bearing (rear main). You can check that by watching the front crank pulley while the clutch is depressed. You can also drop the pan with the engine in.
Believe Nothing
Joined: Jun 2004
Posts: 7,514
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From: W. Central FL.
What a bummer. Do the "sparkles" stick to a magnet? If you have an clean oil sample, an analysis might be worth the $25 or so. At least that is what the last one I had done cost me. Lower end noise and good oil pressure usually don't go together.
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Welder User
Joined: Feb 2009
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From: northwest MT
The noise is a hollow knock, like a rod makes but not super loud. I can only hear it at idle.....it gets louder when the engine is hot. I assume from the oil being thinner when hot? Not thrust, that was the first thing I checked.
A few months ago when changing the clutch, I dropped the pan and checked a couple bearings....they showed normal wear so I wasn't too worried. Now for peace of mind I will just tear it down...
A few months ago when changing the clutch, I dropped the pan and checked a couple bearings....they showed normal wear so I wasn't too worried. Now for peace of mind I will just tear it down...
Logistics Pro
Joined: Jul 2004
Posts: 4,363
Likes: 76
From: Utah
that's a bummer. can't you just buy a couple of those engine rebuilds that come in quarts from kmart to put in it . 
just kidding.
If you come to Speed week you better get in touch with me. I try to get out there at least for one day during the week.
just kidding.If you come to Speed week you better get in touch with me. I try to get out there at least for one day during the week.
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Laughing Gas
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One clue will be in the speed of the sound's repetition. I assume that it is at crank speed and not at valve train speed (four strokes are handy in that respect). I'm going to (sorry!) suggest that perhaps you didn't reseat one of the bearings just right or maybe didn't torque a nut properly. Thus, perhaps you're getting some piston slap or minor rod knock. I'd pull the pan before I made any great big decisions. Perhaps you can fix it from where it sits rather than pull it and find that it's something relatively minor. My 2c
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