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Jwbmo

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About Jwbmo

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    Contributing Member

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    Male

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  • From
    Mexico, MO
  • Porsche Club
    No
  • Present cars
    1999 Porsche 996, 1962 Austin Healey 3000, 1957 Chevy 210 Wagon, 1938 Ford 1 1/2 Ton Truck, 1946 Dodge 1 1/2 Ton COE, 2002 F150, 2015 Toyota Sienna
  • Former cars
    1982 Corvette Collectors Edition

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  1. I am curious, did you two guys by any chance get coolant in oil, but no oil in coolant? Also where and how big was the crack/cracks? Thanks
  2. I bet it's a cracked head if no oil in coolant.
  3. Hi Jim

    Well I have just completed a major project. I have installed the LN dual race IMS, RMS, AOS, flywheel and clutch. It was a big job but doable.

    If you go with the LN bearing, the tool kit and instructions make that part of the job relatively straight forward. 

    I am selling the toolkit if you are interested. This is my thinking... The toolkit is expensive. I paid $350. I would like to sell it for $300. I am happy to pay $50 for the one time use of the tool and then the next person can sell it for $250 if they like and so on.

    Best wishes. Let me know. Cheers Rick

  4. 2016-04-22 14.12.16.mov While I am in diagnosing a cracked head I changed out my rear mounts. Easy job, but glad I did -- '99 - 84000 miles and had developed a slight vibration right at idle - would go away slightly off idle - I hope this cures it. Video - new on left - completely shot on the right!
  5. Thanks Ahsai! The more pictures of cracks I look at, I can envision a crack from a water jacket dumping coolant into the valve cover/oil. So my cylinder leak down might have been good, but I got the coolant stream from the exhaust this time either because I had the coolant test pressure high enough or I had the spark plugs out and coolant found its way into the cylinder through the open plug hole and exhaust from the crack. None of the spark plugs seemed steam cleaned on that bank, but next time I drive back over to work on it, I will pressurize coolant again and borescope those cylinder
  6. The infamous cracked head .....Finally got all the cooling system repairs finished up (new AOS, oil cooler, water pump, L & N low temp thermostat, multiple hoses, new plastic hose connectors) and pressure checked. All waterpump vanes were intact on an original pump with 85K+ ---- all looked good with a minimal leak down as I tightened up a few connections. Re pressurized to 20 and left it for 15 minutes. Came back to see a nice small stream running out of the right bank exhaust. Must be a small crack that I could not detect with the cylinder leak down test that I did with the cold engi
  7. Thank you JFP and Ahsai. JFP -yes, before disassembling, I tried vacuum and pressure on the cooling system. It would not hold anything and blew out so fast with my little pancake compressor, I could not get a read or location at all. Now that I know where hoses go, I should have isolated the AOS and pressure tested system again. I also should have refilled system with some dye, as I was just trying to listen for the air leak location. I falsely assumed it was the AOS after seeing the puddle of coolant in the plenum and disassembled all. I did pressurize the AOS finally up to 60 P
  8. How disheartening! I finally got time to remove the oil cooler and it checks out too! I can see no evidence of leakage between the o rings either. Does any one have any other ideas before I button up the top with new AOS, starter, oil cooler, many hoses, waterpump and cooler thermostat and just try it again before I remove the engine and send it off or salvage the car? Please see my post earlier - large dump of coolant in oil after a fresh oil change still on jacks! - NO oil in coolant --- AOS and cooler hold vacuum, cylinder leak down tests were great - slight leakage on two-one e
  9. The AOS replacement will be a slow process with limited time, but I guess this photo inside the plenum after throttle body removal confirms the AOS dumped coolant instead of a cracked head or bad head gasket (along with the previous leakdown test). In the future with a potential AOS failure or coolant in the oil, this would be one of the first easy things I look for: pop open the throttle body and look for coolant in the plenum. So the AOS not only dumps lots of coolant into the crankcase, but also sucks it into the engine plenum. Sure would like to eliminate this from happening in th
  10. DBJoe996 and JFP in PA Thank you very much for the quick replies! This has been driving me nuts and very glad to confirm my AOS thoughts especially due to the volume of coolant and no opposing pressure. I was ruling out the cooler as I always thought it would create an oil in coolant or a combination with the pressure differential. I am pretty sure the AOS is original - at 17 years old, this should be a time replacement item - not for the potential AO separation failure, but for this coolant issue! Very lucky it failed where I caught it in the shop. Imagine if it slowly dumped coolant
  11. Ok, I have spent countless hours studying this issue on multiple web sites and books trying to figure out my new coolant in oil problem. Yes, I understand it is probably my worst fear, but this occurred in such odd circumstances. 1999 C2 -87,000 mile - oil changes every 3000-4000 with Joe Gibbs oil (since 45,000 mile purchase) - I pull the oil sump off every other oil change and look around (IMS fears), inspect the filter in detail every change - always perfectly clean - almost too clean! I had the vehicle up on jacks doing other work, completed an oil/filter change - ran it on the jack
  12. 53, DITTO - being accused of midlife crisis
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