engine siezed, any thoughts on why
#2160821
09/24/16 01:17 PM
09/24/16 01:17 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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helped a man with a 340 breakin. fired right up & I held it to 2200-2500. oil psi was 80. water temp climbed to 160 fairly fast. no leaks & sounding good & all of a sudden after about 3-4 minutes it suddenly started to slow down somewhat noticeably & I was manning the throttle & I thought I had with my hand just relaxed/backed off a bit so I moved the throttle up a bit but it stayed the same then 2 seconds later I heard a barely noticeable possibly but not sure metallic "hit" then it died 1 second later. we put a socket on the crank & it is locked solid. No info on clearances. thank you for your time.
live every 24 hour block of time like it's your last day on earth
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Re: engine siezed, any thoughts on why
[Re: killermopar]
#2160858
09/24/16 02:24 PM
09/24/16 02:24 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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he's a busy guy but he will get back to me when he opens it up. I was not involved in the build but his OCD matches mine (& then some!). he said the shop assured him that P/V collision was not possible with his dimentions (lift/piston amt in the hole). he said the ring gapping was the norm & bearings iirc between 2-3 tho plastigauged. all the final prep we did was standard procedure AFAIK but I feel bad like maybe I missed something. well I guess it is somewhat conjecture for now but I will post how it turns out
live every 24 hour block of time like it's your last day on earth
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Re: engine siezed, any thoughts on why
[Re: RapidRobert]
#2160879
09/24/16 02:49 PM
09/24/16 02:49 PM
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Joined: Aug 2003
Posts: 43,157 Bend,OR USA
Cab_Burge
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Sounds like some trash got washed into a bearing, maybe a main or rod Let us know what you find out
Last edited by Cab_Burge; 09/24/16 02:49 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: engine siezed, any thoughts on why
[Re: RapidRobert]
#2160903
09/24/16 03:33 PM
09/24/16 03:33 PM
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Joined: Feb 2005
Posts: 4,313 Prospect, PA
BSB67
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he's a busy guy but he will get back to me when he opens it up. I was not involved in the build but his OCD matches mine (& then some!). he said the shop assured him that P/V collision was not possible with his dimentions (lift/piston amt in the hole). he said the ring gapping was the norm & bearings iirc between 2-3 tho plastigauged. all the final prep we did was standard procedure AFAIK but I feel bad like maybe I missed something. well I guess it is somewhat conjecture for now but I will post how it turns out Hmmmm. I would not consider someone OCD if he relies on the shop for PV clearances and his use of plastigauge for checking bearing clearances........
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Re: engine siezed, any thoughts on why
[Re: Morty426]
#2160968
09/24/16 05:30 PM
09/24/16 05:30 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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BSB67, point taken. Morty, same no waver which you would expect on the water temp. it happened FAST, out of the clear blue/no warning, with one or two seconds total from first hiccup to dieing & closer to less than 1 second
live every 24 hour block of time like it's your last day on earth
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Re: engine siezed, any thoughts on why
[Re: RapidRobert]
#2161017
09/24/16 08:03 PM
09/24/16 08:03 PM
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Joined: Jan 2003
Posts: 14,496 So. Burlington, Vt.
fast68plymouth
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We're any of these sand or bead blasted? Intake manifold Valve covers Oil pan Timing cover
I ask because I've seen this done on many occasions, and when the post blasting cleaning procedure isn't 100%, you often end up with a situation like what was described.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: engine siezed, any thoughts on why
[Re: fast68plymouth]
#2161033
09/24/16 08:26 PM
09/24/16 08:26 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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I will add that to my list of questions
live every 24 hour block of time like it's your last day on earth
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Re: engine siezed, any thoughts on why
[Re: fast68plymouth]
#2161048
09/24/16 09:18 PM
09/24/16 09:18 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
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We're any of these sand or bead blasted? Intake manifold Valve covers Oil pan Timing cover
I ask because I've seen this done on many occasions, and when the post blasting cleaning procedure isn't 100%, you often end up with a situation like what was described. The only thing I glass bead blast in a engine is iron rods and crank to be able to check for cracks and that's it. Definitely never aluminum anything, especially not a intake manifold. I learned this on my own the hard way when I was about 19-20 years old and did my own 340 rebuild and used my bosses bead blaster cabinet. Now I use a steam pressure washer to prep my rebuilds. Sounds like it spun a bearing...
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Re: engine siezed, any thoughts on why
[Re: Challenger 1]
#2161055
09/24/16 09:22 PM
09/24/16 09:22 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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it's gonna be interesting what it ends up being
live every 24 hour block of time like it's your last day on earth
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Re: engine siezed, any thoughts on why
[Re: Sxrxrnr]
#2161201
09/25/16 03:29 AM
09/25/16 03:29 AM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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I heard a very slight what sounded like a metallic contact of some sort & it starting to slow down (both at the same time) & I looked over at the tach cuz I thought I had let up on the throttle & I started to throttle it back up & it died. all this took place in about 2 seconds from start to finish & I was thinking later I shoulda killed it on that first contact however slight I heard but it died in about the time it would have taken me to reach the kill switch cuz I was not sure where exactly the switch was (he fired it up/I twisted the dist/pointed the light/kept the throttle open/checked for leaks). EDIT SXR I reread your post & there was the one slight contact rather than a continual interference (if that helps)
Last edited by RapidRobert; 09/25/16 03:40 AM. Reason: thinking further
live every 24 hour block of time like it's your last day on earth
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Re: engine siezed, any thoughts on why
[Re: 62maxwgn]
#2161275
09/25/16 11:33 AM
09/25/16 11:33 AM
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Joined: Jan 2003
Posts: 10,713 North Dakota
6PakBee
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Once the engine cooled to ambient, is it still locked up? My thought would be insufficient piston/wall clearance. I've been involved in a case with a tight bearing. The bearing wiped but didn't lock the engine up.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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