Head Gasket Replacement (Advice Requested)
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Three Wheeling
Joined: Oct 2009
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Do not use an impact gun, I repeat do not use an impact gun. You have iron bolts threaded into aluminum everywhere on that motor, if you use an impact gun you run a GREAT chance that you will either strip or gaul a bolt going in or out.Then you are going to have to start helicoiling bolt holes, it is not worth the time it will save you.
When working with aluminum you need to use hand tools and a torque wrench. Repairing a striped bolt hole wil take you more time than you saved using an impact. Also make sure you put a lite coat of oil or antisieze on all the bolt before you reinstall them.
When working with aluminum you need to use hand tools and a torque wrench. Repairing a striped bolt hole wil take you more time than you saved using an impact. Also make sure you put a lite coat of oil or antisieze on all the bolt before you reinstall them.
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Three Wheeling
Joined: Oct 2009
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Mike, I don't know how you have the time to help so many people out with so much, but thank you. I'll be doing the HG's myself. I'll PM you my number. If you have the time to call, I am not going to turn down the advise of a seasoned mechanic, but please do not feel obligated to call.
Super Moderator
Joined: Jan 2011
Posts: 16,322
Likes: 88
From: Savannah Georgia
re: couldn't bring myself to install a used pump (unless I had to
Agreed. I wanted you to see the pix of the internal corrosion. As a side note, I found a extreme duty fan clutch that fits GMC/Chevy and Rover, it made the air flow increase by about 40%.
Agreed. I wanted you to see the pix of the internal corrosion. As a side note, I found a extreme duty fan clutch that fits GMC/Chevy and Rover, it made the air flow increase by about 40%.
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Three Wheeling
Joined: Oct 2009
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Interesting, would you mind sharing what you found? Being in such a hot location, I'm always interested in increasing the efficiency of my cooling system.
Super Moderator
Joined: Jan 2011
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From: Savannah Georgia
https://landroverforums.com/forum/ge...hlight=whupped
Here it is, a long series, but in there are pix of the GMC clutch and fan that i modified. Clutch is same bolt pattern as Rover, 6 inch, extreme duty, reverse direction. The clutch and fan came from an old GMC (98). Fan blades were a little too big, so I trimmed them carefully with kitchen shears, the blades are "nylon". I made mine a tad too short, I have more clearance around the shroud than I would like. Used an anemometer (air flow meter) to measure the air speed, since size of opening unchanged that means cfm goes up. Air flow compared to stock exceeded stock flow plus AC condenser fan flow. $19 investment from salavge yard for the experiment.
Here it is, a long series, but in there are pix of the GMC clutch and fan that i modified. Clutch is same bolt pattern as Rover, 6 inch, extreme duty, reverse direction. The clutch and fan came from an old GMC (98). Fan blades were a little too big, so I trimmed them carefully with kitchen shears, the blades are "nylon". I made mine a tad too short, I have more clearance around the shroud than I would like. Used an anemometer (air flow meter) to measure the air speed, since size of opening unchanged that means cfm goes up. Air flow compared to stock exceeded stock flow plus AC condenser fan flow. $19 investment from salavge yard for the experiment.
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Three Wheeling
Joined: Oct 2009
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https://landroverforums.com/forum/ge...hlight=whupped
Here it is, a long series, but in there are pix of the GMC clutch and fan that i modified. Clutch is same bolt pattern as Rover, 6 inch, extreme duty, reverse direction. The clutch and fan came from an old GMC (98). Fan blades were a little too big, so I trimmed them carefully with kitchen shears, the blades are "nylon". I made mine a tad too short, I have more clearance around the shroud than I would like. Used an anemometer (air flow meter) to measure the air speed, since size of opening unchanged that means cfm goes up. Air flow compared to stock exceeded stock flow plus AC condenser fan flow. $19 investment from salavge yard for the experiment.
Here it is, a long series, but in there are pix of the GMC clutch and fan that i modified. Clutch is same bolt pattern as Rover, 6 inch, extreme duty, reverse direction. The clutch and fan came from an old GMC (98). Fan blades were a little too big, so I trimmed them carefully with kitchen shears, the blades are "nylon". I made mine a tad too short, I have more clearance around the shroud than I would like. Used an anemometer (air flow meter) to measure the air speed, since size of opening unchanged that means cfm goes up. Air flow compared to stock exceeded stock flow plus AC condenser fan flow. $19 investment from salavge yard for the experiment.
Super Moderator
Joined: Jan 2011
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From: Savannah Georgia
No, was able to mark them from a home rigged jig with some clamps, material is stiff, but cuts without splitting. I figure it is worth 6 - 10 degrees. I was considering this for the old winter/summer thermostat way of doing things. In winter, stock fan and better fuel mpg.
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Three Wheeling
Joined: Oct 2009
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No, was able to mark them from a home rigged jig with some clamps, material is stiff, but cuts without splitting. I figure it is worth 6 - 10 degrees. I was considering this for the old winter/summer thermostat way of doing things. In winter, stock fan and better fuel mpg.
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