How to replace a floor jack’s U-Joint pn 248731

Tech/Mechanic 1 Comment



DennisB DenLorsTools.com © Summary: Quick instructions on how to install the 248731 u-joint in many floor jacks. The 248731 universal joint is used on many different brand floor jacks. It transfers the twisting action form the floor jack handle to release hydraulic pressure or seal the pressure so the jack can be jacked up. The universal joint is necessary to allow the pivoting of the floor jack handle. The u-joint on these jacks last a long time but they are a common wear item that can cause binding or they can many times simply break leaving the jack not usable.

The 248731 universal joint is used on many popular floor jacks.  Application is for the following 2 ton up to 3 ton capacity floor jacks. * Snap On – YA642 * Snap On YA700 – YA700B * Mac Tools JS642USA * Lincoln- 93642 – 2 ton floor jack * Lincoln- 93652 – 3 ton floor jack * Hein Warner – 93642 * Hein Werner – 93652 * Napa 91-642 * Marquette and more! The 248731 supersedes the following part numbers – 228356, 228349, 227874, 890-022-666 and YA700B3. We also have the measurements of the u-joint in case you’re still unsure if it will work on your particular jack.

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Kent Moore J-42385-507 Inserts in STOCK!

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Kent Moore J-42385-507DennisB DenLorsTools.com © Summary: Kent Moore inserts always available with us. We have the Kent Moore J-42385-507 head bolt inserts in STOCK. They are frequently on backorder with GM but we keep plenty in stock. See the following link J-42385-507 or order by phone at 800-524-9783. The inserts are commonly used on GM Northstar and some other applications when an M11x1.5 Kent Moore thread repair kits is used.

The inserts are held in by the bottom being expanded when the install driver is used. This creates a solid repair and is GM’s only authorized thread repair. GM does not recommend stud type repairs in place of the TTY (Torque to Yield) bolts. Ten inserts are used per side so if doing an entire block be sure to order 20. Some GM dealers prefer to order these in bulk at an even greater savings. See our bulk pricing on the Kent Moore J-42385-507 100-Pack.

Broke a 3/16″ Drill Bit – What to use

How To Auto Repair, TIME-SERT Kits No Comments

Rescue Bit use DennisB DenLorsTools.com © Summary: This is another question regarding how to drill out a tool like a drill bit which has a hard metal compound. While the Rescue Bit can also break in some cases, it has saved a lot of jobs. The success rate is good if recommendations are followed and common sense prevails.

Question – I broke a 3/16″ drill bit trying to drill out a broke bolt. Should I use your 1/8″ bit? The broken bit is about 1/4″ inside the hole with jagged edges showing, will the rescue bit be able to get the bit out, then the remnants of the bolt? Should I just use an extractor to get the bolt after the rescue bit removes the broken drill bit?

Answer – Usually you go a little smaller than what you’re trying to drill out so you can use a rounding motion, so I’d try the 1/8″. The rounding motion makes the hole a little bigger to reduce binding which could break the Rescue Bit. I’d also start with the reamer end of the Rescue Bit, because it would have less chance of snagging and breaking on the jagged part of the broken drill bit. An extractor could work but as always be careful not to break it! Too much force will break an extractor every-time if the bolt won’t budge. If the extractor idea doesn’t work keep in mind we sell Time Sert thread repair kits that can be used if needed to install a solid inert that allows the use of the same size bolt. Just need to know what size bolt to recommend a kit. In most cases we have over-size kits available, if needed that still uses the original size bolt.

The 1/8″ Rescue Bit can be used in a drill or in a die grinder. We have the 1/8″ Rescue Bit listed with a collet which is the adapter that fits 1/4″ straight and 90 degree air die grinders. It adapts the die grinder so it can use 1/8 accessories, in this case the 1/8″ Rescue Bit. See our Rescue Bits for sale on our main website.

Calvan 38900 Review – 2002 Ford 6.8 Liter V10

Calvan Tools, Consumer, Ford Problems No Comments


Ford sparkplug blowoutHello Dennis, Good morning.

Hope you’ve had a great summer so far. Quick update for you.  I took on the project to install sleeves on all the spark plugs on my V-10 F-250.  I had originally installed two sleeves (of lesser quality) and found out that the previous owners had also done another one (of lesser quality also).  In all, three spark plugs had blown out of this engine before I decided to replace them all.  I ordered your Calvan 38900 Ford spark plug thread repair kit and four extra sleeves (inserts) and started working on my truck the last week.

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Ford 2001 F250 RF1L2e Spark Plug Thread Repair

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F250 Sparkplug blowout problem
DennisB DenLorsTools.com © Summary: Here’s a common question we get when it comes to Ford spark plug blowouts and which kit to use on 2001 and up Ford RF-1L2E Romeo style heads. Because of the extra step material the spark plug may sit up a little higher if a counterbore is not used. Then there’s the issue with parts store kit like the Helocoil Save-A-Thread kit that commonly fail making the hole bigger, which requires an oversize repair kit. We deal with this all the time. The heads can be saved in most cases if done properly with a good quality kit like the ones we sell.

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Calvan 38900 Videos – Ford Spark Plug Thread Repair

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Calvan 38900 Romeo

DennisB DenLorsTools.com © Summary: We’ve compiled some of the Calvan 38900 spark plug thread repair videos here. Some are from WiseAutoTools.com which is our second website. We’ve been selling spark plug thread repairs since 2005. Calvan 38900 is the 2V kit which is used on many 4.6, 5.4 and 6.8 Liter engines made by Ford. The common spark plug blowout issue has been around quite awhile and surprisingly the issue still persists. Ford starting using the 3V engines in 2004 on some models. The 3V engine uses an M16x1.5 spark plug that doesn’t have the same blowout issue as the previous M14x1.25 spark plugs used in the 2V engines. The 3V spark plugs have a breaking issue when removing. The threads can be damaged though which could indirectly cause a blowout issue if the threads are damaged when changing the plugs. What people don’t realize is that Ford still used the 2V engines that have the common spark plug blowout problem after 2004 in some models. One surprising fact is that the 2V engine was used in the E150 with a 4.6 from 1997 all the way through 2014! See our Calvan 38900 product listing for a full list of vehicles that uses the 2V engine.

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TIME-SERT 2200 FAQ’s Frequently Asked Questions

TIME-SERT Kits, Toyota No Comments

Time Sert 2200 DLTDennisB DenLorsTools.com © Summary: Toyota Camry Toyota Rav4 and Highlanders with the 2.4 four cylinder engine has a very common problem with blown head gaskets due to the aluminum threads in the block failing for the head bolts. The middle three in the back of the head are usually the weak point. However, we recommend installing all 10 inserts to strengthen the threads so that it will be less likely to have a repeat problem. Most of the work is getting the head off, so why not spend a little more time to upgrade all the threads? Below are some of our most common questions when it comes to doing this type of repair. Read on for more information or continue to the TIME-SERT 2200 product listing. Read the rest…

Sata Paint Spray Gun – RP and HVLP Differences?

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SATADennisB DenLorsTools.com © Summary: In this quick article we cover a recent question one of our customer’s had about the SATAJet paint spray guns regarding the difference between “RP” and “HVLP”. Image to the left is a SATA Limited edition CHOPPER series!  Read the rest…

H&S Autoshot 9850 – Aluminum and Steel Dent Repair Station

Auto Repair Shop, Auto Shop Tools No Comments

H&S Autoshot 9850DennisB DenLorsTools.com © Summary: Car manufacturers are using much more aluminum in vehicles today reducing over-all weight to increase fuel mileage. One example is Ford and it’s new trucks having an aluminum cab to reduce vehicle weight by hundreds of pounds. We’ve seen it for years in engine components with aluminum heads, blocks and intakes etc. Suspension and steering components are used a lot too. But, now more body panels are aluminum. With aluminum body panels new tooling is needed to handle these repairs. But what if one dent repair station can handle both steel and aluminum? What if the station could also be used for paint on and paint off? If you own or work in a body shop, I think you’re going to like the H&S Autoshot 9850. Read on or go on over to our product listing for current pricing and a video showing all the ways the H&S Autoshot UNI-9850 can be used as you own personal profit center!

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Head Bolt Thread Repair – Time Sert 11125 VS Helicoil 5543-11

TIME-SERT Kits No Comments

Time Sert 11125 KitDennisB DenLorsTools.com © Summary: Head bolt thread repair kits for repairing headbolt threads in the cylinder block are covered by a master automotive technician. Advantages of using Time Sert 11125 over the Helicoil 5543-11. Both kits are for M11x1.25 head bolts which are commonly found in Subaru and Nissan (and Infiniti) engines. Which is better? What causes failure of the threads? These questions and more answered below. Also see the video discussing differences in Helicoil VS Time Sert. Click the following current pricing on the Time Sert 11125. For over-size see Time Sert 11125BS. See below for more information.

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