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That's wrong....I replaced them after that, all 24 because the design changed and when I ordered 12 there was a mix and I was all spun up. I had you grind because the I replaced some guides....so I'm back to the plug failed as I'd just cleaned it or maybe something else got in there but the air filters were connected so I don't know what could have gotten in.

So sorry to see this pic. Two steps forward and one backward.

Well...poo. That sucks!

Well here's a set forward, I have a piston. I don't recall exactly why I have it, the skirts scuffed a but so it probably measure undersize so I replaced it before I realized the3 bores were going to be oversize and I needed to coat the pistons and this one will certainly coat to fit just fine.


On the use the moment to make it better front I ordered a $7 MAP sensor that plugs into the manifold to look at. I'm wondering if there is any way to fit these to the intake or use a short hose and hide them under the airbox. The idea is that just wires coming out would be neater and the multiMAP is kind of cobbled together at this point so I really don't trust it so actual MAPs and combine the signals in the ECU is the thought which has the added benefit that I can look at each signal and exclude anything that looks like its malfunctioning. A fall back plan is just use maybe 4 sensors....I'm pretty seriously thinking about locking the TBs and just doing the "sync with plug reads and fuel trim like I'm already doing. I have time to think about it....but it feels like I should do something.

OK, the car is telling you that it would rather stab itself in the heart than be driven by a teenager.

For what it's worth, nobody reading this doubts your ability to get it sorted out. Really sorry to hear about this setback, but I'd be lying if I said that I wasn't excited to see how you fix this one.

I started pulling the engine and if I'm being honest describing the effort as 1/2 hearted would be an exaggeration. But I drained the coolant, decided to flush it so on reassembly its antifreeze free and ready for head gasket sealer...then I realized I need to get the water out of the block and fought 1 of the drain plugs out. It will be out Friday or Saturday I guess and hopefully head off Sunday.

About that time amazon brought me the MAP sensor I wanted to see...its small and nice. In theory I could probably put 1 on each port but they would block my access to the manifold bolts. I'll look at that a bit more when the engine is on the bench but right now I'm thinking use a short hose and hide them under the air box when all the hoses are now.




The aluminum tube i ordered for the bumper mount came...but I didn't order what I thought I ordered exactly. This is 3mm wall, I thought it was 1.5mm. Also the grommets I bought give a smaller ID than I was thinking o a different tubing might be better. I would have liked to wrap this up so before pulling e3verything apart but I don't want to wait for more bits so I'll pack it up for now.

Today there was still water on the floor from draining the block yesterday....I squeegeed it and moved on the picking up because I have bits of all sorts of things everywhere let form the get it done push plus it was honestly a mess before and that has to do with me being easily distracted from work I don't enjoy...oh look at all these spark plugs is various stages of fouled.


The NGK set I've been using was looking pretty worn out so they went in the trash but I have another NGK set (or 11 = 1 smashed from the last failure) that look pretty new so I ordered a 12th and cleaned the 11. I also have 2 full sets of autolites, fouled. In the V8 blower engine I really like autolites which is probably why I bought these for the V12. They look hotter than the NGKs and I'm not sure how I feel about that which is likely why they are sitting, I honestly don't recall.


I did drain the oil before coming in. Then Standing there waiting I took a closer look at the muffler....man I did a poor job building that, its off a full inch right to left so one more thing on the list.

Have you ever heard of that failure mode before? I haven't. It's hard to imagine a plug ceramic failure taking out a valve.

Doesn't it seem more likely that something caused the valve to stick in the guide?

Detonation breaks the ceramic but it usually stays a cylinder and just slides until it hits bottom electrode, covering the gap and shutting down the cylinder. I had it happen on the boosted 308 engine and I've seen it on high compression H-D engines a couple times. I had the timing wrong, it was detonating last fall and again a couple weeks ago which is why this is popping into my head as a maybe.

Could the valve have gotten stuck somehow? sure. The wrong exhaust valve clearance took out cylinder 8 some years back so I can 100% guarantee the "go" pin fell through the guide with light oil and the no-go pin could be pushed through because there was no f'n way I was leaving the guides on the tight side twice. But something else could have hung the valve...debris? shim out of place? I'll see whatever there is to see once its apart.

I spent some time avoiding the ferrari...I figured I should let it sit a bit and think about the way its been behaving so I helped my son with the oil change on his bike and hopefully we got a small oil leak sorted. Then more picking up and finding places for stuff that has really not had a home since I finished the basement and drug it all to the shop.....Woah! I have a full new box of plug wires!


The project has been going on so long that I no longer have any idea why I have the wires but the wires have been on/off so many times they are starting to fail and thinking I was out and they are NLA I'm pretty sure so yay!

With that score in hand I got after getting it ready to plug and made decent progress...should be out tomorrow.