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Old 04-11-2011, 02:06 PM   #41
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fire it up.. get most of that cleaned out with a good couple of revs...

I can see 8psi making a difference when added to the total compression, but the HG'* even on L36'* seem to take a lot more boost than that w/o having issues. I don't want to believe you popped an HG that easy.
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Old 04-11-2011, 02:10 PM   #42
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Me either. I could see 20+psi. My datalog showed 155kpa. Atmosphere here is 98kpa so about 8.5psi boost.
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Old 04-11-2011, 02:36 PM   #43
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hmm..... boost kills LIM gaskets, extra pressurizes radiator, blows radiator, when motor is off or when there is no boost, coolant leaks in through LIM gasket?
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Old 04-11-2011, 02:38 PM   #44
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If it were LIM gasket wouldn't I have coolant in the oil?
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Old 04-11-2011, 03:02 PM   #45
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Not sure about your motor, but not necessarily. A leak from coolant area to intake runner doesn't hurt the oil.
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Old 04-11-2011, 09:55 PM   #46
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Confirmed. No compression on cyl4. I'll go start tearing into it.
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Old 04-11-2011, 10:03 PM   #47
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now would be a good time to invest in the MLS headgaskets on WOT-Tech...

were you experiencing any kind of knock in those conditions? the pressure spikes generated by detonation or preignition can do that. and at least it seems that the HG'* are the fuse, not the pistons or rods.
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Old 04-11-2011, 10:06 PM   #48
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I don't think so, but it'* possible.

I'll have it apart in a while, I'll grab some good pics and we'll see if a piston is chiped or something! LOL

I joke but I probably shouldn't...
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Old 04-11-2011, 10:11 PM   #49
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Not been a good month for engines.
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Old 04-11-2011, 10:11 PM   #50
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HOLY **** those MLS gaskets aint cheap!
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