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The damage caused by a loose crank pulley


TRBODSM
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Galant VR-4 org Post #: 901074 posted 05/23/10 02:06 PM     Remind Me!  Send Private Message   Edit Post      
I was driving on the highway about 75mph and the car decided to just shut off. I'll just let the pics do the talking.



















Looks like another rebuild for 1983.

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BoostedAWD91
Senior Member
815/2000


Galant VR-4 org Post #: 901078 posted 05/23/10 02:20 PM     Remind Me!  Send Private Message   Edit Post      
damn man that sucks!! I know what will help ya though if you sell me that nice JDM front bumper to pay for you repairs



#815/2000- Lexus Pearl White


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Smitty1457
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Galant VR-4 org Post #: 901079 posted 05/23/10 02:27 PM     Remind Me!  Send Private Message   Edit Post      
Damn. Beat me to it.

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TRBODSM
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Galant VR-4 org Post #: 901082 posted 05/23/10 02:38 PM     Remind Me!  Send Private Message   Edit Post      
Nice try guys, I pretty much have everything to do a stock rebuild minus rings and bearings. I am still going back and forth on doing a stock rebuild or just getting a daily and doing something a bit better.

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Barnes
Firechicken
908/1000
237/2000


Galant VR-4 org Post #: 901083 posted 05/23/10 02:39 PM     Remind Me!  Send Private Message   Edit Post      
Best GVR-4 mod ever = daily driver. DO IT!



-Jon Barnes
#580/2000 (Long Gone)
#908/1000 Black (Sold)
#237/2000 White

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TRBODSM
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Galant VR-4 org Post #: 901085 posted 05/23/10 02:41 PM     Remind Me!  Send Private Message   Edit Post      
This was my daily and didnt really give me any major troubles until now. I thought maybe I could of put a new head on there and have it running the day afer but seems like the damage was more than I imagined. If the valve wouldnt of broke it might of still been repairable but it is what it is.

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scout
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Galant VR-4 org Post #: 901099 posted 05/23/10 03:49 PM     Remind Me!  Send Private Message   Edit Post      
damn that sucks.
i've seen that happen to a couple of 1G dsm's before. at least it igves you an excuse to put some fresh parts on it.

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rgeier11
sled driving mullet brain


Galant VR-4 org Post #: 901119 posted 05/23/10 05:56 PM     Remind Me!  Send Private Message   Edit Post      
It looks more like a timing belt failure.



1992 GVR-4 #649/1000 SOLD
1998 3000GT VR4 1of19 in New Zealand Green
1992 TSI AWD

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bazeng
work in progress


Galant VR-4 org Post #: 901121 posted 05/23/10 06:02 PM     Remind Me!  Send Private Message   Edit Post      
So what happened exactly?

The crank pulley bolt came loose which made the harmonic balancer come off totally?

Then the lower Tbelt gear on the crank slid out or something?

Sucks mate..



Australia's Slowest VR4


Edited by bazeng (05/23/10 06:04 PM)

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Boostdtalon
Member +++


Galant VR-4 org Post #: 901125 posted 05/23/10 06:43 PM     Remind Me!  Send Private Message   Edit Post      
Damn sorry to hear that. Hopefully you'll have her back together soon.

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NateCrisman
Fisheye Hoodpins
418/2000


Galant VR-4 org Post #: 901135 posted 05/23/10 07:24 PM     Remind Me!  Send Private Message   Edit Post      
I had seen major Tbelt failures which destroyed the engine caused by BOTH the harmonic balancer coming off or the main crank pully bolt backing out.

A: the harmonid dampner crank pulley gets loose....wobbles a bit, cuts into the plastic timing case like butter and either slices of AC belt or chunks of plastic case get between the Tbelt and pulleys and cause the jump & carnage.

B: the main crank bolt backs out (the one that has the 1/2" square hole) and allows the crankshaft timing belt pulley to walk back off the crank and when it gets about halfway off, the key aligning the pully/crank will snap and allow the two to rotate..causing carnage.

Either way is bad mmmkkkk



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4thStroke
Spence knows tools
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Galant VR-4 org Post #: 901136 posted 05/23/10 07:27 PM     Remind Me!  Send Private Message   Edit Post      
This happened to Brianawd when I was with him once. Lucky for him though, the piston only kissed the valves in one cylinder before the motor shut down.

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Brianawd
Higher Launch RPM
439/1000


Galant VR-4 org Post #: 901146 posted 05/23/10 07:51 PM     Remind Me!  Send Private Message   Edit Post      
</font><blockquote><font class="small">Quote:</font><hr />
This happened to Brianawd when I was with him once. Lucky for him though, the piston only kissed the valves in one cylinder before the motor shut down.





I got really really lucky. It could have been really really bad.

I ended up tracing my crank sprocket bolt coming lose because of a leaking water pump. Water some how made its way into the treads and turned the blue loctit I used into past.
Then the crank bolt backed out and the sprocket got lose and slipped on the crank. Mine only slipped by 2-3 teeth because the keyway dug into the sprocket.



1992 Gaylant vr4 #439/1000
11.1at131 562awhp/484awtq
E85 FP3052 parted out
05 EB EVO SSL 11.48at124mph
450awhp/400awtq New 2.3 e85 hks 7460r
05 JEEP liberty CRD DD/ski slut
200hp/385tq



Edited by Brianawd (05/23/10 07:56 PM)

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VR4ish
Unregistered


Galant VR-4 org Post #: 901147 posted 05/23/10 07:52 PM     Remind Me!  Send Private Message   Edit Post      
I almost had a similar catastrophe when I lost the oil plug off the oil-filter housing.
the motor still had the balance shafts in it at the time, well the balance shaft behind the crank pulley seized up from not having oil and stopped the t-belt which stopped the head from rotating
but the rotating mass of the crank kept going and it stripped all the teeth off the t-belt it had in contact with it. I was so lucky that it all happened at a point when all the valves were closed.

but like someone said, this does give you a reason to put some fresh parts on the ride. good luck to you.

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fuel
"Just to be pedantic!"


Galant VR-4 org Post #: 901148 posted 05/23/10 07:52 PM     Remind Me!  Send Private Message   Edit Post      
I think the biggest downfall with Mitsubishi DOHC motors is they aren't non-interference which would totally avoid catastrophic engine failure if the timing belt breaks or slips etc. Toyota and Honda and many others have tried to make most of their engines, DOHC included, non interference - especially the ones driven by a timing belt.



'91 E39A Galant VR-4 Evolution | '80 A164A Eterna GSR Turbo

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gmp
56 pounds
213/1000
179/2000


Galant VR-4 org Post #: 901163 posted 05/23/10 08:50 PM     Remind Me!  Send Private Message   Edit Post      
oh man that sucks, i just killed a clutch slave today woohoo whitey's keeping it interesting...



(213of1k) Sold then died.
(179of2k) back in black
Make Old New Again

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curtis Galant VR4.org Moderator
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475/1000


Galant VR-4 org Post #: 901166 posted 05/23/10 09:11 PM     Remind Me!  Send Private Message   Edit Post      
don't do the JSB thing start working on it now.



92 GVR4 0475/1000
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AnotherNewb
flutterdumper


Galant VR-4 org Post #: 901194 posted 05/23/10 10:33 PM     Remind Me!  Send Private Message   Edit Post      
Dbossman has a 2g GSX that the harmonic balancer seperated and let the acc. belts walk into the timing cover , with less damage, it just cost him a head. Sorry about your luck... Good luck with the rebuild...



Every terrorist killed is a victory for Wookalar

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TRBODSM
Member +


Galant VR-4 org Post #: 901198 posted 05/23/10 11:01 PM     Remind Me!  Send Private Message   Edit Post      
Exactly what Nate said. The bolt holding the pulleys together came loose and the timing belt was only about half way on as you can see the marks on the timing belt. The body of the car held the harmonic balancer and it didnt completley fly off. When the harmonic balancer backed off it pretty much tore up the alt belt but didnt rip it off and somehow it seized. My powersteering was going out so I think that is what caused the alt belt to seize. With the sudden stop of the alt belt and the timing belt half way on it skipped therefore causing all the damage when a valve broke. I dont understand how it happened a year after the rebuild but its a Mitsu thing.

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BOOSTIN HARD
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Galant VR-4 org Post #: 901235 posted 05/24/10 06:45 AM     Remind Me!  Send Private Message   Edit Post      
Quoting curtis:

don't do the JSB thing start working on it now.




Is this a "Do as I say, not as I do" type thing you are saying there?

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alansupra94
Excuse the retarded question.
4/1000


Galant VR-4 org Post #: 901433 posted 05/24/10 08:24 PM     Remind Me!  Send Private Message   Edit Post      
This is kinda why I don't like using blue loctite.

I use the red loctite on the crank, flywheel and important things. I just let the airgun do the work when taking it off



1992 Galant VR4
1996 Toyota Supra TT

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Hertz Galant VR4.org Administrator
OneTitle to rule them all.
77/2000


Galant VR-4 org Post #: 901574 posted 05/25/10 07:15 AM     Remind Me!  Send Private Message   Edit Post   
Quoting BOOSTIN HARD:

Quoting curtis:

don't do the JSB thing start working on it now.




Is this a "Do as I say, not as I do" type thing you are saying there?





Pwnd!



Ryan Hertz

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