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  • 8516 and 8387 Combo Tool
  • Similar to the Miller 10102 but can be used small and wider valve springs.
  • Lower cost alternative to Miller Tools 10102.
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3747-123 Dodge/Jeep Valve Spring & Rocker Arm Combo Tool

SKU:
3747-123
Weight:
0.90 LBS
Shipping:
Free Shipping
Price:
$47.50


Product Description

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The Win 3747-123 is a combination 3-in ONE similar to the Miller 10102 that does the job of the 8426, 8387 and 8516A used on 3.7 and 4.7 Dodge/Jeep/Chrysler engines. It's a high quality steel Valve Spring Compressor and a Rocker Arm Tool combination used in place of the Miller 8426, 8387, 8516A and 10102 for Jeep, Dodge, Chrysler 3.7 and 4.7 engines. The original Mopar Miller numbers are 8426, 8387 and 8516. The Win brand is similar but stronger than the originals! The Miller numbers are listed repair manuals. The 3747-123 (like Miller 8426, 8387 and 8516A). It's a specialty tool used to compress the valve springs and access the keeper which is needed when changing the valve springs. Also can be switched over to the Rocker Arm Tool when you don't need to access the keeper. Use of this tool is safely done without damage to the camshaft or camshaft lobes. There's a partial application below, however this tool works on 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 and 2013. Refer to a service manual for detailed instructions on use. Free 2-3 days shipping time within USA.

  • 2006 (DR, HB, KJ, ND, WK, XK) - Systems (9 - Engine, 3.7L, 9 - Engine, 4.7L)
  • 2007 (DR, HB, HG, KA, KJ, ND, WK, XK) - Systems (9 - Engine, 3.7L, 9 - Engine, 4.7L)
  • 2008 (DR, HB, HG, KA, KK, ND, WK, XK) - Systems (9 - Engine, 3.7L, 9 - Engine, 4.7L)
  • 2009 (DS, HB, HG, KA, KK, ND, WK, XK) - Systems (9 - Engine, 3.7L, 9 - Engine, 4.7L)
  • 2010 (DS, KA, KK, ND, WK, XK) - Systems (9 - Engine, 3.7L, 9 - Engine, 4.7L)
  • 2011 (DS, KA, KK, ND) - Systems (9 - Engine, 3.7L, 9 - Engine, 4.7L)
  • 2012 (DS, KK) - Systems (9 - Engine, 3.7L, 9 - Engine, 4.7L)
  • 2013 (DS) - Systems (9 - Engine, 4.7L)

Question - Do you have an air hose for compressed air to hold the valve up so it doesn't fall in the cylinder when I remove the keeper and spring?

Answer - Yes. The LIS-19700 Valve Holder is commonly purchased along with the 3747-123. *Note if not removing the keeper, like when you are just putting the rocker arm in, the air valve may not be needed. Always follow repair manual instructions.

Question - What's the difference between the Miller 10102 and the Win 3747-123, they look practically the same?

Answer - The Win 3747-123 is very similar to the Miller 10102, in fact they are the same size and diameter. Use in applications when either the 8426 or the 8387 is called for in the repair manual. The Win Tool is stronger and works just like the Miller 8426 and 8387, at a lower cost. The 3747-123 has more function since it can be used to change broken valve springs or just to install replacement rockers or lifters. That's why most customers choose the Win 3747-123 because it can be used when a 10102, 8426, 8387 or 8516A is needed.

Question - Can I just use a "universal" valve spring compressor to do the same thing?

Answer - No. We have searched with all of our suppliers to find a universal type valve spring compressor and there's not one available that works for 3.7 and 4.7 Mopar engines. The best tool for doing rocker arm replacement, valve spring replacement, cam swaps etc is the Win 3747-123 that can be used when a Miller 8426, 8387 or 8516A is called for in a service manual. The Win 3747-123 offers a much lower cost alternative.

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Product Reviews

Showing reviews 1-10 of 24 | Next

  1. Makes job easier 5 Star Review

    Posted by on 20th Feb 2018

    Great tool to have when needed. Wish there were some pictures of how to use tool in packaging. Used internet resources and got job done.


  2. It gets the job done, but it gets in the way 4 Star Review

    Posted by on 5th Feb 2018

    I bought this tool to replace valve stem seals on a 2004 Jeep Grand Cherokee with a 4.7 HO without pulling the engine or heads. Since it uses a 3/8" drive, I was able to use my extensions to operate it even for the valves in the back. The only down side is that 3747-2 and 3747-3 have to be on the far side, so the get in the way of accessing the spring.


  3. 3747-123 Dodge/Jeep Valve Spring & Rocker Arm Combo Tool 5 Star Review

    Posted by on 25th Jan 2018

    Used the tool on my 2000 Jeep Grand Cherokee. Worked great. I had it from Wise Auto Tools in two days.


  4. very good tool for the job is intended to do. 5 Star Review

    Posted by on 21st Jan 2018

    This tool made my life easier to change all 12 lifters in my 2008 dodge nitro 3.7 lt.


  5. valve seal replacement 2002 jeep 4.7L ho Worked great! 5 Star Review

    Posted by on 1st Jan 2018

    Tool worked really well in a tight confined space. Was very happy with the design and quality of the tool.


  6. Awesome Product 5 Star Review

    Posted by on 19th Dec 2017

    It made it so much easier to remove the rockers and valve springs on my 2000 model 4.7L V8 jeep. Thanks guys you are a life saver. I am a mechanic by trade here in Australia and this tool is not available at any tool and spare parts place here anywhere. I looked on line for week. Thanks again.

    From Wise: Thanks Jason!


  7. Great product! 5 Star Review

    Posted by on 17th Nov 2017

    Made changing the broken valve spring on a 1999 Dodge Dakota 4.7l a snap. This tool is a great value, we needed the tool shipped overnight and the cost with shipping was still far below the one it replaces. Thanks Wise Auto Tools!


  8. Worked great! 5 Star Review

    Posted by on 28th Aug 2017

    This tool made changing lifters on my 02 Durango easy


  9. Excellent Tool 5 Star Review

    Posted by on 5th Aug 2017

    Used it on a 2005 Ram 4.7 4x4 . Tool worked mint. Fast shipping great price thanks!


  10. Awesome tool 5 Star Review

    Posted by on 5th Jul 2017

    Good value for the money. Worked awesome on my 03 ram 1500 with the 4.7.


Showing reviews 1-10 of 24 | Next

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