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Old 02-09-2018, 02:02 PM
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Drove the D2 this morning. When I parked it, I noticed that I was making somewhat of a knocking sound at idle.... Ah man, this can't be good. It was kinda intermittent, would knock a few times then stop, then knock again. Not sure what it is, hoping just a bad lifter or something but I have a feeling it's more than that. The "waterfall" sound won't seem to go away, not sure if it's because I can't bleed it or because exhaust is getting into the cooling system. Gonna buy a coolant test kit to find out. Also, at idle, it seems to run a little rougher than I would like, almost like a misfire. So I'm going to check the plugs this weekend. So it looks like there's going to be more repairing before the building happens.
Any tips?
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Old 02-09-2018, 04:38 PM
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I have the day off so Iíve been trying to figure out this knocking problem. I changed the oil again to Rotella 15w-40 and the noise has almost completely gone away. So Iím guessing I have a lifter problem. If thatís the case, I will probably go ahead and order a new set of lifters and a head gasket kit from Lucky8. I just noticed the knocking this morning, definitely was not there when I bought the truck. So odd.
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Old 02-10-2018, 06:17 AM
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Hope it'ds nothing too serious. I'd probably do a compression test and hook up a mechanical oil guage to get a base-line on the condition of the engine...before disassembling anything. Doing the other tests you mentioned will help put things into perspective also.

Had the same type of issue with our 03, bought it, changed oil...ticking/knocking started...changed back to heavier oil and somewhat subsided. But, never really went away. Ended up replacing engine, had three slipped liners, and the bearings and crank looked as though gravel had been ran through them. Have no idea what the previous owner had dumped into it...to quiet it down...but it worked long enough for this dumby to come along and buy it...lol.

Brian.
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Old 02-10-2018, 02:15 PM
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Quote:
Originally Posted by The Deputy View Post
Hope it'ds nothing too serious. I'd probably do a compression test and hook up a mechanical oil guage to get a base-line on the condition of the engine...before disassembling anything. Doing the other tests you mentioned will help put things into perspective also.

Had the same type of issue with our 03, bought it, changed oil...ticking/knocking started...changed back to heavier oil and somewhat subsided. But, never really went away. Ended up replacing engine, had three slipped liners, and the bearings and crank looked as though gravel had been ran through them. Have no idea what the previous owner had dumped into it...to quiet it down...but it worked long enough for this dumby to come along and buy it...lol.

Brian.
Just pulled the plugs to see whatís going on. Looks like it has 6 relatively new BOSCH platinums and 2 old and worn out AutoLite Platinums. Not sure why somebody would go through the effort of changing plugs and wires and only do 6 plugs. Iím hoping that this is the problem. My guess is that the air fuel mixture was detonating at the incorrect time causing a knock. Iím running Shell VPower 91 octane in this so Iím sure the gas is good. For those of you that donít know, 91 is the highest you can get in CA, no 92 or 93 is available unfortunately. The station I get it from is always busy and itís only a few years old so Iím sure the gas is good. Doesnít look like it has been burning coolant either as the plugs look relatively normal, but take a look at the attached picture just in case I missed something. I have new plugs from amazon in the way, supposed to be delivered later today.
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Old 02-10-2018, 05:50 PM
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I put in the new plugs, still getting a knock... Darn. I checked the compression before I put in the new plugs, seems to be all good, just about 150psi across the board. Still have to test the coolant. Then I'll go from there. Definitely coming from the driver's side. I'm thinking it could be rod bearings.

Last edited by DiscoCam; 02-10-2018 at 06:37 PM.
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Old 02-11-2018, 06:30 AM
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Yeah, plugs look pretty normal, beside gap on top-right plug. Compression reading seem okay, and I always like to start with that to determine condition of engine.

Rod bearing noise, normally, doesn't come and go. Maybe sound different at different engine temps, but usually is still there. Maybe you should run some Rislone engine treatment through it, in hopes that it may be a bad lifter...that just needs some cleaning. Oil pressure gauge will help narrow down your search, too. You keep using the term "knock" and not "tick", so I'm assuming the noise is more in the bottom end. Lifter noise rarely sounds heavy, like knock.

Drowned my 01 pretty bad about a month ago, drew water into the cylinder to the point it compressed fluid...had serious lifter noise and miss afterwards, thought I'd be digging into the engine, but dumped some Rislone in, changed oil twice and it's been quiet ever since (fingers still crossed, probably just jinxed myself).

Brian.
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