Cleaned up my pilot today to take some pics to get it ready to sell.After I finished I drove it up and down the road a couple times to see if it was still running right,it was,but right before I was about to put it up I felt it bog a little.Pulled it up on the trailer and revved it up high a couple times and white smoke started pouring out of pipe{I don't think it was steam but who knows}and at the same time coolant started pouring out of the radiator{radiator relocated to top of Engine}
Refilled radiator to try and find leak,hooked up compression gauge at same time.The coolant is pouring out from under radiator cap and shooting out of overflow hose when cranked over.If it's leaking anywhere else its too hard to tell with fluid from radiator dripping down on everything.Compression is still at 185 but when I push button to relieve the pressure off gauge coolant is squirting out the push button to tester.WTF! I'm feeling so dejected right now.
I called Chris at CW Racing,he said are you sure it wasn't steam coming out of pipe? He says if it was smoke it's trying to get rid of oil and I must of blown crankseal,but he's never seen anyone blow a crankseal and a head gasket at the same time before,just my luck.

Sorry to read this. Time to do a leak down test. Maybe you’ll get lucky and it won’t be both.
Chris knows his stuff, that’s certain.

Since coolant isnt flowing at all when cranked over could that be water pump? I'm just spitballing ideals here since not getting any help:(

If the smoke dissipates it is steam from the coolant.

From what you describe it sounds like there are only 3 things it could be, blown head gasket, cracked head or cracked cylinder. My guess is blown head gasket.

If you are worried about a seal just check the balance oil level, if it is a seal the oil will be down.

The coolant is not flowing because compression is pushing it out.

Thanks for replies. I’ve been thinking about it and there’s also another thing it could be. The repair I did to the dome water jacket might not have held.
I think the first thing I’ll do is get a radiator pressure kit and test that first. If that doesn’t show anything then I will do a leak down test again, then check the balancer oil.

Duplicate

I would guess its a head gasket. if your blowing coolant out the rad cap your over pressuring it. or your fix that you posted has failed

Got home from work tonight and attacked this mofo.
First thing I wanted to try was a radiator pressure test, I couldn’t find it leaking anywhere except at the base gasket of the cylinder.
I pull the head off, the repairs I made did not fail but it did fail somewhere else, and you can see it was about to fail in other places, it is bent out. What is causing this I don’t know? Is the compression to high for it or has it just gotten old? Compression what is this high before for four years so......

When I took pipe off it was full of coolant.
Pulled cylinder off,here’s pics

Piston pics

Since I figured bottom end got coolant in it,mixed some amsoil and gas together and filled the bottom end and moved the crank around a few times.I don’t have any choice but to let it sit like that overnight, I am hoping that will keep it from rusting till I can either turn it upside down or try to suck all the gas out with a vacuum

Is that speed chaser cool head?

No,it’s a pro-design

I feel bad man, this thing has battled you every step of the way. That’s pretty wild the head breaking apart like that. Can you go back to a oem head on that setup?

I believe with some modifications yes,And I might end up doing that. I’ve sent everything back to CW Racing Engines and once he gets it we’re going to decide what to do. He seems to think my compression was too high and that’s why this is happening,Could be that, could be metal fatigue, or it could be because theres no backing plate behind that water jacket where it’s breaking

Did it ever backfire prior?

No

You've got a few things going on here. I'm just trying to kindly explain some things. Sorry if I get you offended but I'm only trying my best to help :)

First, I need to tell you, that piston and at least the cylinder head dome are toast. I would consider tossing those items away and get some new. don't mess around with that dome anymore.

Second, its obvious water got down into the Engine. You need to clean that out really well. If its starting to rust, and while you have the cylinder off - I'd recommend cleaning, drying it out, and then FILL the crank case with some DIESEL fuel. We actually do this on sunken skis when we cant get the started - the diesel will displace the water and keep the bottom end healthy until Engine can be fixed.

Third. Water in the mix caused the piston and cylinder to scuff sides pretty badly. Simple - lack of lubrication caused by water ingestion. You need a new piston, and the cylinder needs to be cleaned up and honed (Hopefully not bored again).

Forth. Looking at your piston crown I see whats going on. The lighter grey/brown/white spots are signs of pre-ignition. This happens under 2~3 cases - Mixture too lean. Not enough fuel octane. Squish clearance was set way too tight. In all cases, this would put a lot of stress on the piston, as well as the corners of the cylinder head/dome. This is probably what caused your dome to fail - heat against a very small ammount of material. From there the coolant was fairly free to enter and cause havoc.

So to summarize_
1. Treat your bottom end to a DIESEL bath
2. Prep your cylinder to a;
3. New piston
4. Get a new head
5. Set the squish band properly (Between 45 thou to 80 thou depending on CR, compression, and octane used)
6. Rip/ride another day

Sorry to see your troubles my friend

I'd get that gas/oil mix out of there and replace it with diesel. Nice call on doing that though - it will help but not as long term as diesel.

Under no circumstances should you ever use an electric VACUUM to suck up gasoline. The sparks from the motor (( Internal Combustion Engine ? )) of the vacuum WILL cause an explosion! You'd been warned! Use a hand pump syphon. Rags/paper towels, and time.

One more thing. If water filled the crank case, and you hydro-locked the Engine, you could have:

1. Bent the connecting rod
2. Blown out your reeds
3. Blown out your crank seals

Check everything.

Thanks for replies but y’all are late lol
Sunday I vacuumed the gas out(with dry vac with small suction tube)there was about on ounce of green mixture on very bottom.i then repeated process of pouring more gas mixed with amsoil 3 more times and vacuuming out.I never did see any more green after the first time I vacuumed it out. I then coated with layer of amsoil and moved crank around a few times to make sure it got everywhere.
Piston cylinder and head have been shipped to CW Racing,Once he gets them will decide what to do then.

Should I go back and fill it with diesel?
thanks

That really sucks...Hope you get it sorted out. Sounds like you have gotten some really good advice. Good luck and hope you get it running soon.

I don't believe Engine hydro-locked because I was just sitting on trailer revving it up when it happened and I cut off the Engine before it seized,and it still had 185 compression before I tore it down.

Well Chris at CW Racing has talked me into him reworking a stock head to fit my cylinder.He doesnt like the looks of my head,he says the bolt holes were drilled too big by somebody also and are very thin next to outer O-ring also.Also my piston is a goner,will need a new one.Hopefully he can just hone cylinder.
Edit
Went ahead and rinsed out bottom end with diesel a few times also