Recent content by retiredsparky

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    Broken exhaust manifold bolt

    The Ford V-10 exhaust manifold studs/nuts work well for replacing bolts. Something like 10 foot-pounds of torque on the studs, then the proper torque on the nuts. No possibility of spalling of the aluminum threads.
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    A couple of tips for using exhaust manifold clamps

    Hello Mark, Yes you are right that the torque applied to the nuts is the same as the torque applied to a head bolt. However, the nut is made of the same material as the stud. Steel is far better at resisting spalling, or friction caused crystallization of the thread material in the heads.When a...
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    2012 Yukon XL Denali temperature creeping up at idle only.

    Mr. Diver, I get the intended pun-I have glowed once when a new Christmas gifted shirt with plenty of fuzz ignited from aluminum wiring sparking in a dimly lit room. As an electrician, I was doing a volunteer project for a retired Army veteran when his wife told me that my shirt was emitting an...
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    2012 Yukon XL Denali temperature creeping up at idle only.

    Another thought: did the shop measure the actual fan rpm and compare to factory specs? Or did they measure the air volume (cubic feet per minute). I agree with above postings regarding motor, temp sensor and ECM issues. When you say that the engine is idling is this only when vehicle is...
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    A couple of tips for using exhaust manifold clamps

    When I pulled the heads to redo the roller lifters (loud squeal that was obviously a needle bearing or more no longer rotating), I bought 8 mm studs for a Ford V-10. The advantage? The studs are installed at much less torque, so are very unlikely to overstress either the male stud threads or the...
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    Weird electrical problems

    Bazillion volts (electronic term) of lightening can fry anything in our vehicles. Lightening has so much power that anything with metal, or carbon (tires, wire insulation, plastic, etc) can conduct some of the electricity that is present around the area of a strike. I have seen and repaired...
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    Rear HVAC randomly turns on after engine is off

    How old is your battery? Is the vehicle only driven sporadically during some of the year? Do you use a "smart" maintenance charger on the battery? The reason I ask, is that a battery that sits for long periods of time builds up sulfation in the cells. This can damage the battery and cause...
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    2007 Tahoe/Weird clunking when gas is pressed

    As mentioned above, the transfer case can also cause this noise. There is a large chain in the case that transfers power to the back and front differentials. That chain can wear and stretch, causing a clunking noise. This possibility does not rule out the motor mounts.
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    Tire pressure for bigger wheels

    Another option is to find a flat, open parking lot area. Draw chalk lines across the tread and drive straight ahead far enough to get a few tire rotations and observe the pattern of wear shown by the location of chalk removal.
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    Smelling coolant

    The kit with a small black light flashlight and fluorescent dye added to the coolant can make the search a little quicker.
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    Fan and fan clutch removal during the winter

    Compared to the other power suckers on the engine, and in the transmission the amount needed to drive the fan clutch when not actually needed is probably not noticeable in your fuel mileage. In fact, maybe the fan helps drag the car along the road when it rotates?
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    Cylinder Head replacement -- recommendations

    Summitracing.com has knowledgeable advisors and many choices--800-230-3030
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    06 tahoe small leak detected code

    It would make sense that a leak code for the vapor system would be a device that can allow pressure to be relieved in the system. The three devices that can do that are the two solenoids and the gas cap. Usually when the canister fails, the tubing either plugs up with loose charcoal bits or a...
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    07 yukon denali motor mounts go bad every year

    Pete, Your idea for checking the motor mounts does work. I have used it before. However, I do question how being in reverse will check the passenger side. The torque the motor feels doesn't change direction, no matter the gear selection. The motor and tranny input shaft/pump/torque converter is...
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    Anyone pull a dump trailer with their Tahoe/Yukon

    One thing to keep in mind is that the short wheelbase of an SUV can make it hard to control a trailer during an emergency avoiding/stopping maneuver. A ¾ ton pickup can be a safer tow vehicle because the suspension/weight/length combination can more easily resist the forces created by the load...
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