Hi all,

I have a 95 F150 with a 300 cu ( 4.6 ) straight six.
At 50100 miles going up a hill at about 45 in 4th this motor threw the number 5 wristpin out the side of the block.

Had it towed back into town to a Breakey Motors ( I am not kidding! ) in Walton, NY.

To make a long story short:

Wrangled with Ford, it was out of warrantee but 50k motors on a truck that almost never saw towing, farm work or much offroad with regular oil and other maintence should not blow up. They agreed to pay half...

Breakey went about doing their stuff:
Ordered a rebuilt replacement from Ford.

Engine 1 : They got the truck apart ready for the swap and then realised that the Ford rebuild had a motor mount sheered off.

Engine 2 : They got in into the truck and turned it over only to blow smoke all over the place as it was missing rings on number 2 piston.

Engine 3 : They got it into the truck and turned it over fine. As soon as it warmed up it shot water all over the place as it was missing a head gasket.

Engine 4 : The one that worked, sort of, well at least it runs.


The engine has gone about 15k and now has a nasty shake

At speed temp is good and it pulls fine and no noticable shake.
At idle some but nothing real bad.
At idle and in neutral after it's warmed up the thing shakes so bad the cab shakes.

I mean it impresses the stoplight crown, makes'um think I got a 460 or something onboard though I may need to start carrying dramamine in the glove box

Replaced plugs and cap, replaced wires, put fuel injector stuff in and no codes, what gives?

If it were the mounts why only at idle after warm-up and not at speed or cold idle?

If I wanted to swap the motor ...again... and I wanted a proper place to do the swap what kind of numbers to do a swap to a 351w?

Thanks in advance,

Phil

 

maybe the mounts or tranny mounts need replacing

 

plugs and rotos and so forth are a good place to start but I would be looking for a vaccume leak on one of the cylinders. check real good around the area where the intake bolts to the head. I developed a leak there on the #1 cylinder onc and at idle it would lope like I had a drag cam in it. best way to test this is to use the ol' can of carb cleaner and spray it around the seal. if there is a vaccume leak it should suck the carb cleaner in and you will notice it in the idle.

if you do this and don't find anything then I would move on to a compression check. it is possible that you have a dead cylinder somewhere. in a healthy motor you should get a pretty constant reading across all six cylinders, if one of them is low I would suspect burt valve or bad rings. if two cylinders side by side are low, then I would look into replacing the head gasket.
normal compression reading on a healthy 300 should average in the range of +- 160-180 lbs. give or take a little.

 

after posting I went back and read again and I caght the part where you said it shakes at idle but it runs good. That is a perfect discription of a vacumme leak. check the entire intake system for a possible leak. check all gaskets and hoses connected to the intake.

 

QUOTE:
"Engine 1 : They got the truck apart ready for the swap and then realised that the Ford rebuild had a motor mount sheered off.
Engine 2 : They got in into the truck and turned it over only to blow smoke all over the place as it was missing rings on number 2 piston.
Engine 3 : They got it into the truck and turned it over fine. As soon as it warmed up it shot water all over the place as it was missing a head gasket.
Engine 4 : The one that worked, sort of, well at least it runs."



Let me guess, Union labor built the (4!!!!) engines?

 

Thanks!

I'll take a look this weekend and keep everyone posted.

Phil

 

>QUOTE:
>"Engine 1 : They got the truck apart ready for the swap and
>then realised that the Ford rebuild had a motor mount
>sheered off.
>Engine 2 : They got in into the truck and turned it over
>only to blow smoke all over the place as it was missing
>rings on number 2 piston.
>Engine 3 : They got it into the truck and turned it over
>fine. As soon as it warmed up it shot water all over the
>place as it was missing a head gasket.
>Engine 4 : The one that worked, sort of, well at least it
>runs."
>
>
>
>Let me guess, Union labor built the (4!!!!) engines?
>
>


Dunno who refurb'd them. For all I know they could have been dropped on Japan during WW2...

They were supposed to FoMoCo original refurbs but I think they were just originals...

 

Makes me think that the shop was not putting in a rebuilt motor rather a junk yard motor cleaned up.

Seems like the shop could have delt with the 2nd motor by just repleacing the rings.

Id look in to a new shop to do your work (or dod it your self), its been known to happen shop says its a rubuild but what you get is a cleaned up junker.


Good honest shops are very hard to find thats why no one but my self has ever thouched my truck 86 f150 4x4 300 Big six. Its currently in my shop getting restored doing all the work myself.