As per the title. https://youtu.be/3lDnf5UhdKc I'm pretty sure it's not lifter tick as I just did that job. Fairly certain it's not the VCT gears either as activating the VCT solenoids makes no difference. Thanks in advance.
How long did you run it to get oil into the lifters as you just did them it can take a while to get them to pump up. At least it did in my old cleveland v8 keep the revs low an let the lifters fill can take a frightening long time to quieten down
It's really hard to tell. I can't pinpoint where it's coming from. It ran for a while. I finished the lifters yesterday, ran it for about 20 minutes. It ran for about 5 minutes before I took this video. The knocking is the same as what it was before I did the lifters; the noise is what made me do the lifters in the first place.
Hate to say this man but it does sound very much to me like its hammered a bearing in there. Have you noticed any changes in hot idle oil pressure? E
Yeah, I'm growing more and more confident that it's knocking in the bottom end. Haven't really noticed any changes in oil pressure; I only have the dash gauge to go by though.
Could also maybe be an exhaust leak... sounds a bit 'farty' if you know what I mean. Really hope for your sake it's not a bearing though :/
Unfortunately, I don't think it's an exhaust leak. The noise seems to be closer to the centre of the engine; I went over the manifold bolts anyway, just to check. I think you and Gunwarm might be on the right track. I just spent the morning revving the engine trying to pinpoint the location. I can hear the knock a lot more clearly from the top, than when I'm listening for it with my head next to the sump. In addition to that, it seems to go away when the revs go above a certain range. Deactivating each cylinder also seems to have no effect on the knock.
Mechanics stethoscope Try using a long screwdriver, locate the blade on the area you want to check and put your ear to the handle. This will amplify the sound, work your way around the engine until you pinpoint the location of your problem. Take care around all those rotating bits and pieces.
First thing I did. Also used an electronic stethoscope. I'm still not sure of the location. Sounds like it's around cylinder 5. Not really. Yesterday it was knocking at 60km/h in third gear, but 5 minutes later it wasn't; 5 minutes after that, it was. It was well and truly warmed up at those times ? I had already been driving it for an hour. Afraid not. I got sick of having it apart for so long, I decided to drive it until it grenades itself. Then I'll know what it was for sure.
If it IS the Crankshaft Bearings, the sooner you strip it down, the better(you won't be the first person to detonate an engine by having one half of a bearing, spin around inside the OTHER half(causing the Con-rod to collide with some immovable section of the Crankcase)and in so-doing, detonate/split said Crankcase or Crankshaft. (DON'T ASK ME HOW I KNOW THIS LITTLE GEM-OF-WISDOM).:br:
Ive had two engines with crankshalf bearing rattle. Both were initially only present when the oil was warm and thin. And much louder on light throttle than off throttle or on heavy throttle. The first engine I had with rod knock was a 4a-fe toyota. It did about 10,000kms in this state untill it eventually self destructed via overheating and head damage (sorry poor 4a-fe... young cheddle was unkind to you) The second was a ca18det. After 1000kms of driving the knock was worse and also present when cold as well. Engine came out, new bearings went in. Crank got a polish. Rods were ok. Mine didnt come and go as I drove. But if you can 'play' with the noise making it louder / quieter with light throttle then I am sorry to say its probably rod knock.
