Draynor Posted January 9, 2014 Report Share Posted January 9, 2014 So my car developed a noise tonight. Can not tell where it it is coming from. LZ21 long rod, dogleg 5 speed.First we went through and replaced the spark plugs, cap & rotor, coil, and re-set the timing, since it all needed done anyway. Still makes the noise. Checked the oil "Just in case" it was dry. Which is weird since it was just full yesterday and I only drove 40 minutes today. After filling the oil up the noise so I thought quieted down, but once I started driving again it was still there.I was thinking maybe a rod/main bearing? But the weird thing is when I drive, the car still has tons of power and goes down the road smoothly, it's just awful to listen to the noise, so I tried to stay out of it as much as possible. I noticed it will be louder and more consistent in low gears, once I hit 4th it will stop making it sometimes, depending on how much gas you give it in 4th or 5th makes it louder or quieter. Give it just barley any gas and it will get louder, give it more gas and hold it there and it wont make the noise at all. Every time I shift it makes a odd clunk sound as well. This all got me thinking transmission is having a problem?Really lost here, any help is appreciated! 2 videos below, best I could do in a crunch. Click them to play... 2 Quote Link to comment
datzenmike Posted January 9, 2014 Report Share Posted January 9, 2014 Tail pipe rattle? Quote Link to comment
TENDRIL Posted January 9, 2014 Report Share Posted January 9, 2014 yea id say get that thing up off the ground and check your exhaust rubbers ... unless it is distinctly coming from the engine bay in the vid. it sounds like hallow metal being tapped, not dense engine metals Quote Link to comment
Eagle_Adam Posted January 9, 2014 Report Share Posted January 9, 2014 i took my jack handle to the head, block, bellhousing, and timing cover and i cant pinpoint the sound. i was leaning towards a bad tranny mount but until its on stand i cant look CUS THE GOON IS TOO DAMN LOW!!!!! :rofl: 1 Quote Link to comment
Draynor Posted January 9, 2014 Author Report Share Posted January 9, 2014 Gonna go jack it up and check the exhaust and tranny mount now.Just a minute ago, I took the tranny tunnel plate off and started it, It sounded louder right there... Quote Link to comment
Draynor Posted January 9, 2014 Author Report Share Posted January 9, 2014 Well the tranny is tight. Doesn't move at all really.The exhaust has a little wiggle room. It is basically touching the floor and tranny at the same time in some spots. I was by myself so hard to tell if holding the exhaust in place made the noise go away since you have to rev it to hear it.Guess I got to wait till someone is home... Quote Link to comment
Eagle_Adam Posted January 9, 2014 Report Share Posted January 9, 2014 Guess I got to wait till Eagle_Adam is home after i get out of school at 10 pm... fixed :rofl: Quote Link to comment
Draynor Posted January 9, 2014 Author Report Share Posted January 9, 2014 :lol: I was actually probably gonna drive the focus to class, just in case... Quote Link to comment
danfiveten Posted January 9, 2014 Report Share Posted January 9, 2014 Im leaning towards tranny or exhaust like everyone else. dont sound like motor at all. Adam will get it for ya, he always does. 1 Quote Link to comment
Draynor Posted January 12, 2014 Author Report Share Posted January 12, 2014 Well "H5WAGON" and I adjusted the valves today. After the first adjustment noise sounded a little louder, then we tried again and it kinda sounded like it quieted down, but it's some what herd to tell, next to a busy street lol. Adjusted one more time, then 5 or so minutes later it started making another ticking sound. Now it always does it even at idle, never really did it at idle before. We determined both noises are coming from the top end. We ran it with out the valve cover, and nothing looked like it was shaking or anything. Anybody have idea what in the head could be making this noise?I know you can't tell much from a video, but here is another with the "New" clicking sound. On video it kinda sounds like a exhaust leak, but it's not... Quote Link to comment
wayno Posted January 12, 2014 Report Share Posted January 12, 2014 Exhaust leak where the exhaust manifold connects to the rest of the exhaust system, this has happened to others before, they swore it was the engine, but it was just an exhaust leak. It can also be the where the exhaust manifold connects to the head also, but that is usually easier to figure out, as it is closer to your eyes and ears. Have you bottomed it out lately? Quote Link to comment
Draynor Posted January 12, 2014 Author Report Share Posted January 12, 2014 No bottoming out lately. I guess it doesn't hurt to buy a $2 flange gasket :rofl:It really sounds like a clacking though, more than a leak. I have had a bad leak before, no gasket at all on the downpipe. and it didn't sound like this. Worth a shot though. Quote Link to comment
wayno Posted January 12, 2014 Report Share Posted January 12, 2014 No bottoming out lately. I guess it doesn't hurt to buy a $2 flange gasket :rofl: It really sounds like a clacking though, more than a leak. I have had a bad leak before, no gasket at all on the downpipe. and it didn't sound like this. Worth a shot though. I am not saying that is what it is, can you get your hand down there without burning yourself again and feel for a leak? You have the early exhaust manifold(double tube)? Quote Link to comment
Draynor Posted January 12, 2014 Author Report Share Posted January 12, 2014 Yeah early mani. It didn't feel like it last time. I'm highly doubtful of a leak.Thinking I might just take the head off, too really check things out. Quote Link to comment
wayno Posted January 12, 2014 Report Share Posted January 12, 2014 Yeah early mani. It didn't feel like it last time. I'm highly doubtful of a leak. Thinking I might just take the head off, too really check things out. Check everywhere for a leak, it should be louder when your giving it the gas, and less noisy when you let off the gas. 1 Quote Link to comment
Draynor Posted January 13, 2014 Author Report Share Posted January 13, 2014 Alright! Got a compression test done tonight. Going to do the oil pressure tomorrow.#1: 182#2: 186#3: 175 - Came in at 170 the first time.#4: 190Pretty good numbers. Made some phone calls and did some thinking. The old pistons in this block, before we rebuilt it, On 3 of them the valves hit. After some more thinking and looking back at pics #3 piston had the biggest gash in it from the valves out of all of them. Just so happens that number 3 cylinder is getting the lowest compression too. So we're thinking maybe the valve is bent... Quote Link to comment
datzenmike Posted January 13, 2014 Report Share Posted January 13, 2014 Have someone start the engine after you get your hands around the exhaust. You'll have maybe 10 sconds before the pipe warms up. I wouldn't read too much into a very slightly low cylinder. Quote Link to comment
TFM1066 Posted January 13, 2014 Report Share Posted January 13, 2014 with the motor running dump a little ATF down the carb and then look for the smoke coming out of where ever you think the exhaust leak is. How ever it sounds like its coming from the lower end, Quote Link to comment
Draynor Posted January 13, 2014 Author Report Share Posted January 13, 2014 Only had little time today to check things out, and no one around to start car and such.But I did find/fix a problem.So went to put the oil pressure gauge I bought in. Took the old sender out and no oil came out of the hole, hmmm. Hooked up the gauge anyway and it showed no pressure. So stuck a screwdriver in there to see if it was clogged or something, nope, it just stops. Then remembered the screw we put in a hole just above the sender cause oil was coming out of it, I thought before this was the sender hole, but everyone else thought otherwise.So I put the sender in there, oil light goes off, yeah! Then hooked up the gauge, and it reads 50psi at idle. I think that fixes my oil pressure problem! :D :D :D Quote Link to comment
Eagle_Adam Posted January 14, 2014 Report Share Posted January 14, 2014 Oops.... Guess i put it in the wrong hole :/ 2 Quote Link to comment
Draynor Posted January 14, 2014 Author Report Share Posted January 14, 2014 Went ahead and took the head off. I have a car to borrow for a while, so I thought might as well check everything out. Taking it apart tomorrow...The #2 pistons is pretty clean compared to the others. A bronze color.Also one of the valves has some grinding around the area it touches. The cam also has some grind marks as well. All pictured below. You can see the grinding around the valve area here. You can see the grinding on the cam here, also the head has some marks too... Quote Link to comment
datzenmike Posted January 15, 2014 Report Share Posted January 15, 2014 Alright! Got a compression test done tonight. Going to do the oil pressure tomorrow. #1: 182 #2: 186 #3: 175 - Came in at 170 the first time. #4: 190 Pretty good numbers. Made some phone calls and did some thinking. The old pistons in this block, before we rebuilt it, On 3 of them the valves hit. After some more thinking and looking back at pics #3 piston had the biggest gash in it from the valves out of all of them. Just so happens that number 3 cylinder is getting the lowest compression too. So we're thinking maybe the valve is bent... Did not know this was a Z22 block / CC head. These would be real good on a stock 8.4 compression L20B but yours is 10.48 to one. I would expect a lot higher even over 200. Motor was and is not at TDC. #1 valves should be closed. If you set by timing mark then something is wrong. Where did all that oil come from on the #2 piston??? Notice #2 valves are all coked? Mark the cam location so you can put it back and rotate it to lift the #2 exhaust valve off it's seat. Does it look bent? Quote Link to comment
Draynor Posted January 15, 2014 Author Report Share Posted January 15, 2014 Not sure how the oil got on the #2 piston, was hoping it was from I lifted the head up.Yeah we set the timing by the mark. I didn't set anything before I took the head off. Just started taking everything apart.Couldn't tell if it's bent. I got The head off and had enough time to take pics and get to class.Going to tear the head down tomorrow. But might have a lead on a CC A87. Would be easier for me to just buy that... Quote Link to comment
H5WAGON Posted January 16, 2014 Report Share Posted January 16, 2014 Even if things look good, does not mean it is... Bent valve was not allowing it to open all the way. Quote Link to comment
Draynor Posted January 18, 2014 Author Report Share Posted January 18, 2014 Ok, so ended up being the #2 intake valve was bent, So bad that it wouldn't come out by hand. Tapped it out and the guide cracked :(. The #2 exhaust valve was also bent a little.Took it to the machine shop with the extra valves I got from Mike. Ended up being a couple of my other valves were just slightly tweaked, good thing I got those extras. So he hot tanked the head, grinded the valves & seats, and replaced the cracked guide all for $50 :cool: Oh and he had it all done within a couple hours :)Put it back together tonight, Cams on just didn't get a pic. Hoping to have back on the car and running Sunday, Miss my car...I HATE THE FOCUS :mad:Cracked guide on #2 intake 1 Quote Link to comment
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