ShadowsPapa
Well-Known Member
- First Name
- Bill
- Joined
- Oct 12, 2019
- Threads
- 247
- Messages
- 40,496
- Reaction score
- 54,011
- Location
- Runnells, Iowa
- Vehicle(s)
- '25 JTMX, '23 JLU 4xe, '82 SX4, '73 Javelin
- Occupation
- Retired auto mechanic, frmr gov't ntwrk security admin
- Vehicle Showcase
- 3
Be aware that the location of the front body mount bolts (not the very front like in the engine bay - but the front in reference to our sliders/steps) has changed on the 24 and later model years.
RSE emailed me when I asked about "why are you listing two sets for the JT - one for 20-23 and another for 24-25" and they said - because the front body bolt was moved and it required a different bracket and bracket position.
The issue with heating these large long bolts is that you are losing a lot of heat before it can transfer to where it is needed. So yes, you really need to get the head of the bolt quite hot in order to transfer enough heat up to the thread area. As you are heating, all of the metal that bolt is touching is acting like a heat sink, drawing heat OUT of the bolt. That includes the big washer and anything else touching that bolt. They are heat sinks pulling heat out of the bolt as you are trying to get it hot enough that the heat reaches the threads inches away from the head of the bolt.
I broke mine with a 15" bar - yes, only 15". I got the bolt down enough to put the bracket in place, and started to turn it back in and SNAP.
That's when i turned around and ordered the heater above. I've since used that heater for getting the pulley off a JD mower deck gear box, bending steel rod, and other uses so it's not been a waste.
Look at the length of bolt and that huge washer taking heat away from the bolt while you try to heat the thing only by that little bit of bolt head you have access to...........
This short little bar broke that bolt.
RSE emailed me when I asked about "why are you listing two sets for the JT - one for 20-23 and another for 24-25" and they said - because the front body bolt was moved and it required a different bracket and bracket position.
The issue with heating these large long bolts is that you are losing a lot of heat before it can transfer to where it is needed. So yes, you really need to get the head of the bolt quite hot in order to transfer enough heat up to the thread area. As you are heating, all of the metal that bolt is touching is acting like a heat sink, drawing heat OUT of the bolt. That includes the big washer and anything else touching that bolt. They are heat sinks pulling heat out of the bolt as you are trying to get it hot enough that the heat reaches the threads inches away from the head of the bolt.
I broke mine with a 15" bar - yes, only 15". I got the bolt down enough to put the bracket in place, and started to turn it back in and SNAP.
That's when i turned around and ordered the heater above. I've since used that heater for getting the pulley off a JD mower deck gear box, bending steel rod, and other uses so it's not been a waste.
Look at the length of bolt and that huge washer taking heat away from the bolt while you try to heat the thing only by that little bit of bolt head you have access to...........
This short little bar broke that bolt.
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