Changed intake Gaskets, Now the engine is angry! Help? :(
I'm pretty sure the cap is on correctly, but I'll double check! It's got 4 screws to hold it down, and they went in fine, but at this point I'll check anything I can.
So you got me there I suppose. However, I'll be honest and say that the noises the engine makes within the first 5 seconds of it running are scary enough to me to never have had time to check the timing. Heck, I never even got out of the drivers seat before turning it back off!Overall, I think the next thing is compression test, check timing as best as I can with the engine off, assuming it all checks out, put it all back together, crank it and pray... record video, and then... see what happens. I'll post up the results when I'm done. Thanks again everybody for all your ideas and help! I really appreciate it.
One last question... what's the chances I could have a compressed/stuck lifter that'd cause noise like this?
I'm pretty sure the cap is on correctly, but I'll double check! It's got 4 screws to hold it down, and they went in fine, but at this point I'll check anything I can.I'll give that a go. I'm going to test compression on each cylinder, then if that checks out, I can take the cap off and confirm TDC lining up with #1 on the cap like factory while I'm doing it. While I'm checking compression, I'll remove all plugs for ease of cranking, and that'll give ample opportunity for something to blow out if it's going to happen.
In what you're saying... wouldn't that mean it would interfere with the little distributor cover that bolts to the upper intake? That fit in place normally, and didn't touch the distributor, but I can certainly check again. The "clamp"/hold down portion at the base with the bolt is clamped on the "ridge" of the distributor base, and it seemed to be resting on my new gasket, but I'll double check that too!
Boy I certainly hope not! I don't recall seeing anything in there out of the ordinary when I put the lower intake back on. It bolted down fine, so certainly nothing should be in the way that interfered with that much. I'm trying to think if there's an access hole to the valley for me to put the bore scope in to, but I don't think there is so I may be SOL without tearing it apart again.
My experience and the FSM led me to just marking the distributor... however, I DID mess part of that up, which is that whole "I'm human" thing.
So you got me there I suppose. However, I'll be honest and say that the noises the engine makes within the first 5 seconds of it running are scary enough to me to never have had time to check the timing. Heck, I never even got out of the drivers seat before turning it back off!Overall, I think the next thing is compression test, check timing as best as I can with the engine off, assuming it all checks out, put it all back together, crank it and pray... record video, and then... see what happens. I'll post up the results when I'm done. Thanks again everybody for all your ideas and help! I really appreciate it.
One last question... what's the chances I could have a compressed/stuck lifter that'd cause noise like this?
1. My engine didn't clank or make angry noises when cranking over without the plugs in. So that's positive I think. If there was something in the valley or in the cylinders that I just missed while putting it together, I feel like I'd have heard something.
2. Compression results were less happy than I'd have hoped they were. Cylinders 1, 2, 3, 5, 6, 7, and 8 seem to be a healthy 180-190 PSI. Good! But then... there's Cylinder 5... It's at 155.

Anyway... while I don't think this is what I was hearing, noise wise... that's a variance of 14-15%, which is too much, right? So... does this mean it's valve-job time?
I had noticed that on cylinder 5 the first time around that I had noticed one of the valves looked open. This should be normal... cam rotation and wherever it stops and all... but when I went out to check just now again, the same valve appears to either be partially open, or maybe this is showing a dropped valve seat? Maybe it's nothing? What do you all think?
*EDIT* Yeah... something is up I'm pretty sure. Bumped the motor over and took another photo, you can see the other valve is open now, this one has remained the same. Bummer... head rebuild time?
Last edited by Lunchcopter; Apr 7, 2018 at 05:18 PM. Reason: Took second photo











