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    ARP STUD INSTALL BLOCK THREAD FAILURE

    When I did my engine a few years back, the Warden had done his investigation (useful info). I saw it, thought it interesting and more or less looked at my engine the same way. I made the same observations as to how deeply the threads went into the block and confirmed his numbers. Barring the...
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    86 f250 6.9 rebuild/refresh advice and questions

    RE The distilled water, a coupla weeks shouldn't be a problem. Don't be alarmed if it comes out a little rusty when you finally do drain it and install antifreeze/coolant.
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    86' non-turbo intake???

    After my original set (bought at the dealer when I bought the truck in '87), walked off with a "buddy" (may his genitalia turn black and fall off), I went on eBay and found a set. They are out there. You can also contact some of the major sellers of manuals and literature on eBay about a set...
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    Oil Sample

    Remember and keep into perspective two things here, those readings are PARTS PER MILLION. They are way short of anything catastrophic, so you are just in a cautionary area waiting for another lest. Ignore anyone at this stage that advises a teardown. Overall, you can't tell much from two or...
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    86' non-turbo intake???

    I concur about the factory manuals. Best way to go, bar none. It's all there, not abridged or homogenized as with the Chiltons and Motors. Haynes is a little better because it's a little more focused... but they still abridge and homogenize. The three manual (four if you can get Light Truck...
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    Coolant in Oil

    I presume the engine was warm when you did this test? I wouldn't tear the engine down for those numbers necessarily. In a perfect, know-everything world, you'd also do a cylinder leak down test (google it) which could tell you the location of the cylinder leakage but I don't see numbers so bad...
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    Coolant in Oil

    Fecal matter occurs! No worries. The important thing is that lessons were learned and you had not yet torn the engine down while on this goose chase, which would have made it a harder lesson. You may still have a major problem but at least the direction is clearer. Good luck.
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    86 f250 6.9 rebuild/refresh advice and questions

    Nah, the rings don't need much lube at this stage so save yourself the aggro on the cylinder lube. Try the oil can first. IMO, the odds are good that will work. You'll want to pump half a quart or so in there bet be sure to check the oil level after it's running. You may be a little overfill after.
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    86 f250 6.9 rebuild/refresh advice and questions

    No oil in the cylinders. Not helpful, not necessary. Are you saying there is no lube at all in the oil pump? Installed dry? If so, that could make it tougher. If you pump enough oil down the turbo hose, and since you said the oil filter was full of oil, if you pump enough oil down, it may get...
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    86 f250 6.9 rebuild/refresh advice and questions

    If you backfill, it should help the lube system to prime. As to the fuel, remove the fuel cap on the fuel tank, loosen the line at the secondary filter or remove the schraeder valve. Get a rag and a blow gun, stick the blow gun in the tank, seal the hole with the rag, and slightly pressurize...
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    86 f250 6.9 rebuild/refresh advice and questions

    When bullfisher said prime the turbo line, I though he meant to take an oil gun and pump oil down it to backfill the the lube system. I have done that on other engines when I couldn't get the system to prime. One thing I learned to always do in an overhaul is to pack the oil pump with Vaseline...
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    86 f250 6.9 rebuild/refresh advice and questions

    Did you fill the oil filter with oil? That will greatly speed up the priming process.
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    ARP STUD INSTALL BLOCK THREAD FAILURE

    You could be, are very likely to be, correct in what you say ... but even pros make errors and sometimes it pays to question when there are anomalies. There are a few question in this that need answers in order to reach a conclusion about what happened. It's not likely we, the forum we, will...
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    compression question for possible 6.9 build

    You're talking like this is a new thing. It isn't. People have been playing with IDI diesel like this for decades. It's one thing to start a low compression IDI in a Phoenix winter and quite another to start one in Boston tonite. Or one at 10,000 feet in Leadville, CO. Lowering the compression...
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    compression question for possible 6.9 build

    Please explain this? First I've heard. My engine has had a turbocharger since 7K miles.
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    compression question for possible 6.9 build

    Boring will increase the compression ratio slightly but the piston manufacturers compensate by moving the piston pin a slosh closer to the crown.
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    compression question for possible 6.9 build

    Yes and no. There is no short way to explain DI vs IDI and I don't have time today for the long way. If you Google "Direct Injection", Indirect Injection" and "Ricardo Comet V" you will get plenty to read. The big difference is that with IDI, the injector sprays first into a small prechamber...
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    compression question for possible 6.9 build

    Direct injection means somebody made a new cylinder head (or figured out a way to adapt the old one) and used different pistons with a dished crown. Adapting the old head would not be optimal due to injector targeting. If you adapted the pre chamber area to take an injector that would spray...
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    ARP STUD INSTALL BLOCK THREAD FAILURE

    So you think ARP's 125 lbs-ft is a bit high for the block? Considering the factory head bolt spec is 100 lbs-ft, you may be right. I wonder why ARP went so far above? The 6.9L factory spec is 75 lbs-ft. and the ARP spec is only 80 lbs-ft., a 7% increase. A reasonable increase. A 7% increase...
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    ARP STUD INSTALL BLOCK THREAD FAILURE

    Bizarro World! I have heard of this happening in cast iron but never seen it. I have done it on aluminum blocks by overtorqueing, sometimes by not paying attention, or a mis-adjusted torque wrench (several VW air cooled, a Jensen-Healy and a Rover V8) My first guess was torque wrench...
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    compression question for possible 6.9 build

    The issue is Indirect Injection, which hasn't been used in the industry for quite some time. Most everything new is Direct Injection and in that world, lowering the compression is part of the performance game. Not in the IDI world. Step one for anyone contemplating an IDI build is to fully...
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    86' non-turbo intake???

    Welcome to this motley crew! Do you have a pyrometer? If not that's job one. You have to verify the stock situation and observe the improvements otherwise it's an exercise in automotive masturbation. ( : < ) Exhaust? the two hot spots are the y-pipe and the muffler. It would be fun to run...
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    Towing heavy at 20MPH

    If I recall correctly, at 25 mph in low range and with 4.10:1 gears and 33-inch tires, my truck was turning near 3000 rpm, even in direct. On paper it calculated out to a bit over 2800 rpm but there was some converter slippage that could add 100-200 rpm. That's not a situation I would prefer for...
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    Towing heavy at 20MPH

    How much "looser" is the E4OD converter vs a C6? I have no frame of reference on this, other than my C6, which does not get hot at 15,000 lbs. and above in high range and did not get excessively hot towing at 62,000 lbs (see the pic) in low range. I know the lockup converters have a higher flash...
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    egt temperature question

    Good info, thanks!

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