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| Engine tick, gets worse with clutch (Page 2/2) |
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Modesto
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APR 14, 10:59 PM
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Well, I'm about 99% sure it's a broken crank. I did some more troubleshooting and reading, and found similar symptoms, then watched a video of one that had a confirmed broken crank and it was the same exact sound. I'm kinda happy and kinda sad to be honest!
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Patrick
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APR 15, 02:31 AM
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| quote | Originally posted by Modesto:
Well, I'm about 99% sure it's a broken crank.
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And it still runs? 
This has now gone beyond my knowledge comfort level... but out of curiosity, where might the crank be broken?
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olejoedad
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APR 15, 07:55 AM
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Engines don't run with broken cranks.
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Modesto
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APR 15, 08:59 AM
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Pretty sure its between the 2nd and 3rd mains. Apparently it shears at an angle, so it is still able to transfer rotational force but will be really noisy when the pieces separate (like when the clutch is no longer pushing them together). I think my higher pressure clutch probably is keeping it together longer than a stock setup would.
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Gall757
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APR 15, 09:47 AM
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| quote | Originally posted by olejoedad:
Engines don't run with broken cranks. |
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apparently it's possible.
Anyone ever broken a crank in 2.8????[This message has been edited by Gall757 (edited 04-15-2020).]
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olejoedad
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APR 15, 11:44 AM
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I can go back to bed now, I learned something today.....thanks for the information!
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Dennis LaGrua
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APR 15, 01:03 PM
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If you suspect breakage of any type grab your self a piece of 3/4" hose about 30 " long. Put a funnel on one end and tape it in place as an earpiece. Start the engine and try and pinpoint the noise. IMO, it would be a very rare occurrence if your crankshaft was split. ------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "
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Gall757
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APR 15, 02:33 PM
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| quote | Originally posted by Dennis LaGrua:
If you suspect breakage of any type grab your self a piece of 3/4" hose about 30 " long. Put a funnel on one end and tape it in place as an earpiece. Start the engine and try and pinpoint the noise. IMO, it would be a very rare occurrence if your crankshaft was split.
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Modesto has already done this Dennis....with a professional version of what you describe......... 
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Dennis LaGrua
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APR 15, 02:41 PM
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| quote | Originally posted by Gall757:
Modesto has already done this Dennis....with a professional version of what you describe......... |
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I believe that an engine with a broken crankshaft would manifest itself in an engine that runs poorly. Broken cranks can also cause damage I could be wrong but my guess is a rod knock but anything may be possible with a cast crankshaft. Waiting for the outcome.------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "
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