Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 05-30-2011, 08:13 PM   #1
Merc Cruzer
Senior Member
 
Merc Cruzer's Avatar
 
Join Date: Jul 2010
Location: Conifer, Colorado
Posts: 1,021
Default Engine seized 2 miles after rebuild

I just finished rebuilding an engine for my 53 Merc. Had the new block magnafluxed - no cracks. Bored out to .60 over. Reused the pistons, rods, crank and cam. Had engine fully balanced. New rings, berings, and bushings. Fired it up last night and all was well. Took it out for a break-in run today and got about 2 miles and it seized. Oil pressure was 45 lbs at 30 mph. Temp was 170. Was running great until I came to a stop and then it just seized. Tried to turn it over by hand (2 breaker bar on the front pulley bolt) with no luck. Drained the oil and nothing in the oil. Any suggestions....... before I pull the engine.
Merc Cruzer is offline   Reply With Quote
Old 05-30-2011, 08:20 PM   #2
nathanmac
Member
 
Join Date: Feb 2011
Location: Invercargill, New Zealand
Posts: 86
Default Re: Engine seized 2 miles after rebuild

incorrect ring gap? some swarf or blockage anywhere in an oil line?
nathanmac is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 05-30-2011, 08:25 PM   #3
flatjack9
Senior Member
 
flatjack9's Avatar
 
Join Date: May 2010
Location: Oshkosh, Wi
Posts: 3,364
Default Re: Engine seized 2 miles after rebuild

What sort of clearances, ring end gap, etc.?
flatjack9 is offline   Reply With Quote
Old 05-30-2011, 08:26 PM   #4
Merc Cruzer
Senior Member
 
Merc Cruzer's Avatar
 
Join Date: Jul 2010
Location: Conifer, Colorado
Posts: 1,021
Default Re: Engine seized 2 miles after rebuild

I can only guess as this point as to possible blockage in the oil line ...the gap was checked at the machine shop after the bore was completed and again when I assembled it....
Merc Cruzer is offline   Reply With Quote
Old 05-30-2011, 08:27 PM   #5
Lawson Cox
Senior Member
 
Lawson Cox's Avatar
 
Join Date: May 2010
Location: Above the gnat line in Georgia
Posts: 5,050
Default Re: Engine seized 2 miles after rebuild

Try to crank it again after it cools down. I had the engine in a 28 Buick do the same thing after running it just a few miles. Pulled it down and everything looked fine. Cranked it back up and just nursed it along for a while and no further problems. Just built a little too snug I guess.
Lawson Cox is offline   Reply With Quote
Old 05-30-2011, 08:47 PM   #6
Deuce-Merchant
Senior Member
 
Deuce-Merchant's Avatar
 
Join Date: May 2010
Location: BC Canada
Posts: 166
Default Re: Engine seized 2 miles after rebuild

Im confused, how do you reuse the old pistons if you bored the block .060 oversize???
Deuce-Merchant is offline   Reply With Quote
Old 05-30-2011, 08:51 PM   #7
Merc Cruzer
Senior Member
 
Merc Cruzer's Avatar
 
Join Date: Jul 2010
Location: Conifer, Colorado
Posts: 1,021
Default Re: Engine seized 2 miles after rebuild

<FONT color=#1a1917><FONT face=Verdana>By way of more detail. My old engine was already bored out to .60 +. I had a crack between an exhaust valve and the cylinder so I decided to get a new block. Found the block and had it maganaflux to insure there were not cracks. Decided to reuse the pistons (.60), rods, crank and cam from the old engine. Had the block bored to match the pistons. Had new cam bearings pressed in, used new rings, rod bearings and main bearings. Had the engine balanced. Cleaned up the heads with a .008 cut. Resized the rods. Cut all seats. Installed exhaust seats. New pin bushings. Polish crank. Drilled intake for adjustable lifters. New adjustable lifters.
Merc Cruzer is offline   Reply With Quote
Old 05-30-2011, 08:57 PM   #8
Shadetree
Senior Member
 
Shadetree's Avatar
 
Join Date: May 2010
Location: Cottageville, WV
Posts: 1,535
Default Re: Engine seized 2 miles after rebuild

What a bummer! Sure hope it can be saved.

Shadetree
__________________
Son, you will never blow an engine up in high gear.
Shadetree is offline   Reply With Quote
Old 05-30-2011, 09:37 PM   #9
40 Deluxe
Senior Member
 
Join Date: May 2010
Location: now Kuna, Idaho
Posts: 2,820
Default Re: Engine seized 2 miles after rebuild

How long between assembly and fire-up? I've seen wrist pins seize more than once due to lack of initial lubrication. We always seem to slather the rods and mains and cam lobes with lots of slick'em but igmore the pins! Or, if it sat a long time after assembly, the oil on the pins seems to go away (Pin oil clearance is so small to start with, there's not much oil to begin with).
40 Deluxe is offline   Reply With Quote
Old 05-30-2011, 09:42 PM   #10
Merc Cruzer
Senior Member
 
Merc Cruzer's Avatar
 
Join Date: Jul 2010
Location: Conifer, Colorado
Posts: 1,021
Default Re: Engine seized 2 miles after rebuild

Time between end of assembly and fire up...about 24 hours. I did pull the plugs and nothing. I drained the oil and nothing in the oil. My next step is to drop the steering linkage and pull the pan and that will tell me where I am going next.
Merc Cruzer is offline   Reply With Quote
Old 05-30-2011, 09:46 PM   #11
ford1
Senior Member
 
Join Date: May 2010
Location: oroville ca.
Posts: 1,555
Default Re: Engine seized 2 miles after rebuild

before you get to excited, pull the pan and loosen all the rods try to turn engine, if no luck loosen all the mains and try to turn engine, if no luck my guess the pistons or rings are froze up
ford1 is offline   Reply With Quote
Old 05-30-2011, 11:05 PM   #12
JM 35 Sedan
Senior Member
 
JM 35 Sedan's Avatar
 
Join Date: May 2010
Location: Near Rising Sun, Maryland
Posts: 9,687
Default Re: Engine seized 2 miles after rebuild

What was the actual piston to cylinder bore clearance after machining? What actual gap setting did you use for piston rings? Who is the piston manufacturer and what material are they made from? I'm thinking machined clearances could have been set too close. I hope the problem can be easily corrected and all turns out well for you. I know this has to be discouraging for you. I once had zero oil pressure at start up on a newly built FH engine and had to pull and dismantal most of the engine to find the problem and then check everything internal for possible damage. This was not my happiest Flathead V8ing memory but there was a happy ending. This engine is now running well and has gone over 6,000 miles.
__________________
John

"Never give up on what you really want to do. The person with big dreams is more powerful than one with all the facts". Albert Einstein

Last edited by JM 35 Sedan; 05-31-2011 at 10:10 AM.
JM 35 Sedan is offline   Reply With Quote
Old 05-30-2011, 11:11 PM   #13
Mike in AZ
Senior Member
 
Mike in AZ's Avatar
 
Join Date: May 2010
Location: Waddell, AZ
Posts: 2,528
Default Re: Engine seized 2 miles after rebuild

pull the intake?? heads??....then see if it will turn over??....good luck...Mike
Mike in AZ is offline   Reply With Quote
Old 05-30-2011, 11:17 PM   #14
Mike in AZ
Senior Member
 
Mike in AZ's Avatar
 
Join Date: May 2010
Location: Waddell, AZ
Posts: 2,528
Default Re: Engine seized 2 miles after rebuild

another thot.....did you have the block drilled and tapped for full-flow oil filter...or the 95% full-flow??...are you running the filter now, if you did??....Mike
Mike in AZ is offline   Reply With Quote
Old 05-31-2011, 12:35 AM   #15
richard crow
Senior Member
 
Join Date: May 2010
Posts: 1,331
Default Re: Engine seized 2 miles after rebuild

before you do any thing loosen the starter make sure it is not jamed the eng could of just stalled & when you went to start it the starter jamed it does happen onley takes a few min. to check.
richard crow is offline   Reply With Quote
Old 05-31-2011, 02:25 AM   #16
52merc
Senior Member
 
52merc's Avatar
 
Join Date: May 2010
Location: new zealand
Posts: 1,054
Default Re: Engine seized 2 miles after rebuild

drilled intake for ajustable lifters ?
52merc is offline   Reply With Quote
Old 05-31-2011, 05:26 AM   #17
Mart
Senior Member
 
Mart's Avatar
 
Join Date: May 2010
Location: Solihull, England.
Posts: 5,493
Default Re: Engine seized 2 miles after rebuild

Long shot - has the block been modified in the past for full flow filter (passage plugged) and you are running bypass or no filter and thought the passage was open like stock?

Cam bearings - oil drillings lined up?

I think I would be leaning towards careful disassembly, to isolate the cause, to prevent any further damage. Hopefully 99% of the motor is ok and can be reused once the problem is solved.

If it is a valve or lifter siezed then the engine will turn over almost 2 turns then stop and be able to wind back the same amount.

If the cam is siezed then the crank should move very slightly back and forth, just the play in the cam gears.

If all or some of the pistons are siezed, the crank might move very slightly, just the play in the bearings.

If a big end is tight, then very slight crank movement may be seen.

If the crank does not move at all, it is the main bearings that are stuck.

Good luck with it.

Mart.
Mart is offline   Reply With Quote
Old 05-31-2011, 06:54 AM   #18
Mike51Merc
Senior Member
 
Mike51Merc's Avatar
 
Join Date: May 2010
Location: Northeast Pennsylvania
Posts: 1,549
Default Re: Engine seized 2 miles after rebuild

I'd check out the mains and rod bearings. Could be a bit of debris got sucked through an oil passage and jammed one up.
Mike51Merc is offline   Reply With Quote
Old 05-31-2011, 07:29 AM   #19
Walt Dupont--Me.
Senior Member
 
Walt Dupont--Me.'s Avatar
 
Join Date: May 2010
Location: Gardiner Me.
Posts: 4,200
Default Re: Engine seized 2 miles after rebuild

Merc Cruiser, everybody is making a guess, let us know what you find. My guess is you have seazed a rod bearing. Walt
Walt Dupont--Me. is offline   Reply With Quote
Old 05-31-2011, 08:11 AM   #20
allford
Member
 
Join Date: Aug 2010
Posts: 63
Default Re: Engine seized 2 miles after rebuild

Check that starter
allford is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 08:01 AM.