5280VertDET

Ok. I have read about blown rings and rebuilds and all the other fun things, but my numbers are a little odd...

EDIT: Never smoked, trace amount of oil in intercooler (probably from an older and incorrect catch can, on motor for 30 days), cant see any coolant on dip stick and from what I can tell the cylinders are black (see the spark plugs below).

I will be draining the oil and dropping the pan to look for pieces later this week.

Here's the run down:

Left work, warmed engine for 2-3 minutes, heard a "thawhap" bogged and lost power.

Upon further inspection, the coupler before the intercooler popped off. reconnected it and attempted to start, turned over and no start. Rolled it back to work thinking it was just flooded. No problem, came back the next day and it would start again. Towed home and tested fuel and spark, all good. Read a bit on here, compression tested as such:

WOT
1: 120
2: 60
3: 60
4: 30??

I hoped that the gauge was broke, it was... whew...

Got a new and different compression gauge and re did the test:

WOT:
1: 60
2: 30
3: 30
4: 30

Results were 10-15 PSI higher on a "wet test" using a cap of oil in the cylinder.

Thoroughly confused because prior to the coupler popping off it was running and starting fine...

Also, these are my spark plugs:




Question, what's next to determine what is going on? I was thinking about getting a leak down test, but I don't have a compressor... and I don't really want to rip the motor apart just yet.

I just don't know how this happened?

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S13 Vert | SR | PE1420 | 5-Speed | 15x9.5 - 0 |