engine goes crunch - JeepForum.com

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post #1 of 123 Old 05-13-2016, 02:45 PM Thread Starter
bruinjeeper
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engine goes crunch

Well,

I guess I will be adding to the recent onslaught of engine rebuilds going on here in the f12, of the 2.5L variety.

Left work early, wife on a trip in Alaska, figured i'd go enjoy some camping/trail riding this weekend. Cruising along, no issues, put it into overdrive to make a pass on the highway (110 kph) and CRUNCH!

Tried to boot her back up, engine turning nada. Give Give Give little gas, starts and crunching ensues. Sounds top end (valve, lifters, etc). Unsure until I crack it open. At this point, she's probably due for a complete re-build as I prefer having engine internals wear together. What do you guys think? 300 dollar tow ride home doesn't help on on tight budget. Being my DD, I can't afford serious down time either.

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Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
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post #2 of 123 Old 05-13-2016, 02:49 PM
mike134
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I assume you mean you took it OUT of overdrive for the pass? For RPMs to go up?

Honestly, I'd check the transmission first. You might be crunching up what used to be a torque converter.

You got coolant in the engine still?
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post #3 of 123 Old 05-13-2016, 02:57 PM
Chrisnvegas
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Sux

Tow trucks are such a rip off too.





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post #4 of 123 Old 05-13-2016, 02:58 PM Thread Starter
bruinjeeper
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Coolant in the engine?

I assume so - No leaks.

I was thinking transmission related but after I had the tow guy give it some gas and ignite - it definitely sounded top end.

It is possible for the noise to travel though, I was on the side of the highway afterall.

I'll take off my inspection plate when I get it back home. Now, the real tricky part - just thought about how in the hell I'm going to get it down two levels of underground parking by myself. :

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
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post #5 of 123 Old 05-13-2016, 03:01 PM Thread Starter
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Hey Chris you hinting at me dropping in an I-6.

In my neck of the woods I wouldn't even find one - if I did, it'd be a a price I couldn't afford

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
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post #6 of 123 Old 05-13-2016, 03:06 PM
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Quote:
Originally Posted by bruinjeeper View Post
Hey Chris you hinting at me dropping in an I-6.

In my neck of the woods I wouldn't even find one - if I did, it'd be a a price I couldn't afford
It was a hint!



The 2.5 longblocks are darn near as expensive as the 6

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post #7 of 123 Old 05-13-2016, 03:07 PM
mike134
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I'm more worried about catastrophic coolant failure rather than a small coolant drip. As in, all of your coolant or oil blew out across the highway and you haven't noticed yet.
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post #8 of 123 Old 05-13-2016, 03:09 PM Thread Starter
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I back tracked quite a bit - there was nothing on the highway.

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
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post #9 of 123 Old 05-13-2016, 03:12 PM Thread Starter
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Question, if and when I do (somehow) get it to my parking spot: should I try and fire it up to video record what I'm experiencing? Or is this a stupid idea which would cause some other issues. Although at this point, I don't really see how anything can get much worse as I'm not fully aware of what the issue is yet.

Like I said, was noisy on the side of the highway. It would start and run, but damn was there some crunching.

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
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post #10 of 123 Old 05-13-2016, 03:13 PM
Chrisnvegas
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Maybe it's a valve or something

Sucks that it happened right as we are entering summer.

How was the temp? Did it idle?

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post #11 of 123 Old 05-13-2016, 03:19 PM Thread Starter
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The temp is always stagnant at about 210. I didn't really check it after I cranked it up as I was focussed on other things.

I changed the coolant in December, and all has been well coolant wise.

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
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post #12 of 123 Old 05-13-2016, 03:25 PM Thread Starter
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I'm thinking valve related as well.

Temp was just under 100C

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
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post #13 of 123 Old 05-13-2016, 03:33 PM Thread Starter
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Steps as I can remember them.
1. Stepped down hard on the skinny pedal to pass.
2. Crunching ensued about 6 seconds after as I was accelerating.
3. Crunching continued although less harsh as I let off the skinny pedal.
4. Got on the shoulder, and gave it a little gas the crunching picked up in sound (like a clacking crunching lol). Seemed to have considerably less power although it did pick up.
5. Frantically was able to put it in park before I stopped rolling although I think ( unsure) the vehicle was off at that point. Sorry happened pretty quick.
6. Had the tow guy crank her with no pedal. It would turn and try to start but no go.
7. Had the tow guy crank while gassing it. Started up and idled. In pain, the clacking made me wince and I had him shut her down.

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
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post #14 of 123 Old 05-13-2016, 03:48 PM
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Ouch!!! Sorry to hear that man!

If you can't be good, be good at it! >:-D
http://www.jeepforum.com/forum/f286/hound-2833082/
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post #15 of 123 Old 05-13-2016, 03:55 PM
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Quote:
Originally Posted by bruinjeeper View Post
Steps as I can remember them.
1. Stepped down hard on the skinny pedal to pass.
2. Crunching ensued about 6 seconds after as I was accelerating.
3. Crunching continued although less harsh as I let off the skinny pedal.
4. Got on the shoulder, and gave it a little gas the crunching picked up in sound (like a clacking crunching lol). Seemed to have considerably less power although it did pick up.
5. Frantically was able to put it in park before I stopped rolling although I think ( unsure) the vehicle was off at that point. Sorry happened pretty quick.
6. Had the tow guy crank her with no pedal. It would turn and try to start but no go.
7. Had the tow guy crank while gassing it. Started up and idled. In pain, the clacking made me wince and I had him shut her down.
You need to narrow down the noise. Timing chain and tensioner cheap. Valve or head cheap. Listen to narrow it down. If its under the valve cover do a compression test.
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