Another crank broke!!!

5ohCOUPE · 07-06-2004, 05:28 PM

My friend broke 2 within 2 months, and mine just broke. They are stock short blocks with about 100k miles on them. The crank broke right behind the first rod journal on all 3 motors. Is this a common problem?? I tell you what, WOW what a noise.

NO SLO PK · 07-07-2004, 05:34 PM

No not very common at all. What are you guys doing to these cars?

tireburner163 · 07-08-2004, 02:44 AM

Oddness, usually the block will go before the crank does.

-Josh, aka the tireburner

jonnyk · 07-08-2004, 08:24 AM

Something sounds funny. Any other signs of damage? How do the bearings look? How does the oil pump driveshaft look?

LX5liter · 07-08-2004, 08:39 AM

Were the blocks align bored before assembly?

5ohCOUPE · 07-08-2004, 05:35 PM

They were all stock shortblocks from the factory. Never rebuilt. Just about 100k miles on them. I can see why my friends broke because he went through about a bottle a day. LOL. Mine was all motor and it broke. The bearings were fine and oil pressure was good. The crank pretty much tore the whole front of the block apart. Blew the timing cover off. Bent some valves in the heads when the timing chain broke. The front half of the crank ended up hitting my radiator. Didnt hurt the radiator.

I guess its a Florida thing. We do beat the hell out of our Stangs.

Capri306 · 07-10-2004, 02:21 AM

WOW....

You guys should seriously consider investing in a few Dart 351 blocks and forged cranks, at least....I just don't know what else to say. I've NEVER snapped a crankshaft. EVER.

420nitro · 07-10-2004, 10:02 PM

I have broken a couple.

Unfortunate it was due to "user error". Your buddy most likely broke it due to a mis tune. Probably went to lean and dead-in-it-ate it to hell. (I can't spell

) Any way if you look at the bearings it will generally tell you the whole story along with the wear marks on the piston skirts and cylinders.
If the bearings look like someone hit them with a tiny ball-peen hammer then your answer is big time dead-in-it-ion issues!

****, we need some spell check up in this bitch

88workcar · 07-12-2004, 08:06 PM

Some one dig up the pics of mine. The first main cap breaks first, then the crank. It Just looks the other way. Mine blew the entire front half of the block and every thing in that area.

07-06-2004, 05:28 PM	#1
5ohCOUPE Registered Member Join Date: Sep 2001 Location: ORANGE PARK FL. USA Posts: 208	Another crank broke!!! My friend broke 2 within 2 months, and mine just broke. They are stock short blocks with about 100k miles on them. The crank broke right behind the first rod journal on all 3 motors. Is this a common problem?? I tell you what, WOW what a noise. __________________ 91 LX COUPE, 3.73 gears, 2 1/2 inch H-Pipe, 1 5/8 MAC long tube headers, 73 MM C&L MAF, 70 MM MAC TB, LUNATI cam,1.7 TFS Rockers, TFS Track Heat heads, TFS Track Heat intake, T5 with PRO 5.0 shifter, Griffin aluminum radiator, Fluid Damper, SSM traction bars, 190 GPH in tank fuel pump. And more to come.

07-07-2004, 05:34 PM	#2
NO SLO PK Registered Member Join Date: Mar 1999 Location: Arcadia, CA, USA Posts: 731	No not very common at all. What are you guys doing to these cars? __________________ Russ L '91 LX - 331 w/ Procharger '03 Cobra Convertible - Pullied '94 Lightning '65 Mustang Coupe

07-08-2004, 02:44 AM	#3
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	Oddness, usually the block will go before the crank does. -Josh, aka the tireburner __________________ 1987 Buick T-type 1998 HD Electra Elide

07-08-2004, 08:24 AM	#4
jonnyk Being stroked is great Join Date: Oct 1998 Location: Alberta, Canada Posts: 772	Something sounds funny. Any other signs of damage? How do the bearings look? How does the oil pump driveshaft look? __________________ Novi 2000 now spinning off the snout of the 331... Mods Pics

07-08-2004, 08:39 AM	#5
LX5liter dude5l Join Date: May 2001 Location: Grande Prairie, Alberta, Canada Posts: 603	Were the blocks align bored before assembly? __________________ Good luck! Brad R. 1992 L.X. 5.0 coupe MODS: A few little bolt ons New Best time ...11.60 @ 128 mph @ 2000+ ft altitude. Rice Haters Club member #39 Users rides #2542

07-08-2004, 05:35 PM	#6
5ohCOUPE Registered Member Join Date: Sep 2001 Location: ORANGE PARK FL. USA Posts: 208	They were all stock shortblocks from the factory. Never rebuilt. Just about 100k miles on them. I can see why my friends broke because he went through about a bottle a day. LOL. Mine was all motor and it broke. The bearings were fine and oil pressure was good. The crank pretty much tore the whole front of the block apart. Blew the timing cover off. Bent some valves in the heads when the timing chain broke. The front half of the crank ended up hitting my radiator. Didnt hurt the radiator. I guess its a Florida thing. We do beat the hell out of our Stangs. __________________ 91 LX COUPE, 3.73 gears, 2 1/2 inch H-Pipe, 1 5/8 MAC long tube headers, 73 MM C&L MAF, 70 MM MAC TB, LUNATI cam,1.7 TFS Rockers, TFS Track Heat heads, TFS Track Heat intake, T5 with PRO 5.0 shifter, Griffin aluminum radiator, Fluid Damper, SSM traction bars, 190 GPH in tank fuel pump. And more to come.

07-10-2004, 02:21 AM	#7
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	WOW.... You guys should seriously consider investing in a few Dart 351 blocks and forged cranks, at least....I just don't know what else to say. I've NEVER snapped a crankshaft. EVER. __________________ Capri306, Moderator The Mustang Works Online 1979 Mercury Capri 1987 5.0L Mustang LX Notchback 1993 5.8L Eddie Bauer Bronco

07-10-2004, 10:02 PM	#8
420nitro Registered Member Join Date: Nov 2003 Location: Rockford Posts: 596	I have broken a couple. Unfortunate it was due to "user error". Your buddy most likely broke it due to a mis tune. Probably went to lean and dead-in-it-ate it to hell. (I can't spell ) Any way if you look at the bearings it will generally tell you the whole story along with the wear marks on the piston skirts and cylinders. If the bearings look like someone hit them with a tiny ball-peen hammer then your answer is big time dead-in-it-ion issues! ****, we need some spell check up in this bitch

07-12-2004, 08:06 PM	#9
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	Some one dig up the pics of mine. The first main cap breaks first, then the crank. It Just looks the other way. Mine blew the entire front half of the block and every thing in that area. __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

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