Advertisement
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Home Who's Online Today's Posts HP Calculator CompD Gift Shop Mark Forums Read
Go Back   Competition Diesel.Com - Bringing The BEST Together > The Starting Line > Super Stock Diesel
Register Members List Timeslips EFI Live Library Invite Your Friends FAQ Calendar Mark Forums Read

Closed Thread
 
Thread Tools
Old 12-02-2020, 04:03 AM   #21
mhuggler

Name: mhuggler
Title: One piece at a time
Status: Not Here
Join Date: Sep 2007
Location: Uno, Pa.
Member`s Gallery
Posts: 1,311
Quote:
Originally Posted by biggy238 View Post
I'm calm. Just seeing how far you will go.

FWIW I agree, the bearing should deform and fail before the tensile strong of the rod is exceeded.

The engine in the picture was isolated. They keep the machine in a large warehouse. They happened to have left it outside for building maintenance and it got hosed.

Sent from my motorola one action using Tapatalk
After spending a couple weeks in Caterpillarís failure analysis lab which was incredibly eye opening, I will not say that anything is 100% verity until Iíve completed at least the first few steps of an analysis IN PERSON. Itís unbelievable how many times Iíve been wrong about a diagnosis in the past simply because I was completely unaware of all the types of failures. Iíll use your broken connecting rod picture as an example: It is entirely possible that the connecting rod broke because it already had a failure in the rod and the hydrolocking just sped things up. There could have been an inclusion in the rod in a high stress position that was present the day it was forged. Iím sure the evidence has been bashed off of the face off the crack, but you would have seen beach marks radiating away from a tiny bubble in the corning indicating the progression of a fatigue fracture. In other words, it is possible that the rod was going to break either way! The water just moved things along quicker. That failure analysis class was incredible and highly recommended by the way. One of the instructors was a doctor in chemistry; I donít think Iíve ever tried to cram so much information into my poor head in two weeks before.
__________________
2002 2500 4x4 ETH/DEE-F1 Mach 5's/62/65/12/Smarty/ATS Ex.manifold/AFE intake/TST Comp./.020 marine gasket/o-ringed/ARP studs/5"stacks/Airdog 150/Isspro guages/Southbend 3600 DD/3.54 gears/leveling kit/Bilstein 5100frt,5150rr/37" BFG A/T's on 18" Eagle 114's/Borgeson SS/DSS
 
Old 12-04-2020, 02:32 AM   #22
Big Blue24
 
Big Blue24's Avatar

Name: Big Blue24
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Jan 2008
Location: Cedar City, UT
Member`s Gallery
Posts: 6,293
The reason I say the starter is not strong enough to bend a rod because when you run a higher compression 12v with high timing, sometimes a cylinder will fire early enough to completely stall the starter. I've had this happen on the Junker several times and never bent a rod.

I would suspect that, if a cylinder is full of water, and one of the other cylinders fires moments before the hyrdo-locked cylinder approaches TDC, then yes, the engine could have enough power/torque to bend a rod. But the power comes from the other cylinders... engine power... not the starter.
__________________
95' 2wd Junker Drag Truck
3/17/2018 10.55 @ 134 MPH
SXE 364.5 over HT80
 
Old 12-04-2020, 05:31 AM   #23
biggy238
 
biggy238's Avatar

Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 9,408
My co-worker and I were talking about this yesterday. I don't think it's possible for a completely filled/stalled cylinder to be cranked.

I've made partially filled heui engines crank past the lock in the past, but no way to quantify how much was there.

Sent from my motorola one action using Tapatalk
__________________
Quote:
People tend to be tribal
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
-A Truck has no Name
 
Old 12-04-2020, 06:33 AM   #24
BigPapa
 
BigPapa's Avatar

Name: BigPapa
Title: Old Fart
Status: Not Here
Join Date: Jan 2008
Location: Springfield, TN
Member`s Gallery
Posts: 4,035
When I worked at the truck shop, our experienced Ford tech would put a truck with fuel in the cylinders on the lift, put a breaker bar on the crank, and hang on it till the fuel passed through the ring gaps. It took a while but it was safe.

We had a fresh young tech that decided he'd pull the glow plugs on one and crank it over to get the fuel out. He was under the hood watchin with someone in the cab to crank it over. A "slug" of fuel about a foot long shot out of the cylinder right beside his head and dented the foil-wrapped insulation on the 15' ceiling. It was within an inch or two of his left eye. It would have put his eye out if it had hit it. He never did it again....
__________________
Scott

1998.5 QC SB 2WD Goerend's Auto 12V
 
Old 12-04-2020, 07:09 AM   #25
biggy238
 
biggy238's Avatar

Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 9,408
Hahahahaha we have a mark on the insulation 30 ft above one of our bays. All I can say is it wasn't me.

FWIW we are usually good about sucking the cylinders dry, and if we have an issue, rotating the engine backwards by hand is sufficient.

Sent from my motorola one action using Tapatalk
__________________
Quote:
People tend to be tribal
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
-A Truck has no Name
 
Old 12-04-2020, 08:57 AM   #26
mhuggler

Name: mhuggler
Title: One piece at a time
Status: Not Here
Join Date: Sep 2007
Location: Uno, Pa.
Member`s Gallery
Posts: 1,311
You guys beat me to it. I was going to say, how many guys have removed #6 injector first, all the fuel from the rail dumped in it and they didn't suck it out?
__________________
2002 2500 4x4 ETH/DEE-F1 Mach 5's/62/65/12/Smarty/ATS Ex.manifold/AFE intake/TST Comp./.020 marine gasket/o-ringed/ARP studs/5"stacks/Airdog 150/Isspro guages/Southbend 3600 DD/3.54 gears/leveling kit/Bilstein 5100frt,5150rr/37" BFG A/T's on 18" Eagle 114's/Borgeson SS/DSS
 
Old 12-04-2020, 11:14 AM   #27
biggy238
 
biggy238's Avatar

Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 9,408
IIRC, there was a man in Alabama that was killed by this scenario while working on a D10? It's been mentioned in training but I can't remember if it was CAT or Msha.
You'll put your eye out kid!

Sent from my motorola one action using Tapatalk
__________________
Quote:
People tend to be tribal
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
-A Truck has no Name
 
Closed Thread

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 02:58 AM.

 


Powered by vBulletin
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Copyright ©2006 - 2021, CompetitionDiesel.com
all information found on this site is property of www.competitiondiesel.com