You can type here any text you want

catastrophic failure on rebuilt motor ...

Welcome!

By registering with us, you'll be able to discuss, share and private message with other members of our community.

SignUp Now!
motor is coming out for a tear down ...intake gasket checked out ok...no indication at this time...lingering questions remain on if the shop checked for cracks on heads and block. this motor overheated with blown headgaskets before the rebuild.
the receipt from the shop is hand written and does not say so.
 
sealing the head studs / head bolts is critical too. If the treads were not sealed properly you could get a nasty little coolant leak inside the engine.
 
Key phrase????
this motor overheated with blown headgaskets before the rebuild.
 
Check to see if thread sealant was used on the head bolts, if not there's your problem.....
 
here's the update guys;
block not decked....maybe i should have advised and maybe machine shop should have recommended it...
the heads were pulled and the gaskets had waved from heat...they had hot spots in the middle...the rings were not blown out.
block and heads rechecked for cracks ...heads checked out straight.
4 core rad taken out ...had very week and soft tanks at the bottom...this rad got pinhol leak just before start up and could have been cruded up too
new rad put in
motor is back together and all is well so far....i've got less than a 100 miles on it and have thrown less than 10 # of boost....fuel pump now giving me pains:mad:
the dry upper s hose mystery remains from the first failure
this time i left the cap off and heater at full and ran the engine until i was completely comfortable...with water ...added RMI after a couple of days.
the downer to the re-rebuild....crank needed a slight polish...clearances were very tight first time around so i ended up losing some hot idle oil pressure this time.
when i look back at things...the day after the first break in...it was still a very cool night..with the fan on high it was idling 170 and then one time 185 without even going for a drive...i ignored it...next day had a chance to take it for a drive...same weather...normally my car on that kind of cool breeze could see 140-150s fan on high while cruising but nope..she was up getting into 170-180s and eventually hit 195 and i hit the long highway to see if she would cool but fan on high it just kept slowly climbing into 200s at which time the car shut off so we coasted to the side of the road.
In hind sight the excitement clouded the signs that something was up regardless that it seemed fine, maybe it was the rad, or it all started during the breakin which saw glowing headers and the 200 or so heat coming to the end of the 30 minute breakin.
 
glowing headers are no big deal ever open your hood at night with no light I seen mine glow many of times even on new engine brake in usually use a extra fan blowing on engine if braking in a flat tappet cam have you checked gauge with another gauge or a IR thermometers temp gets 220-240 then i would be a little concerned.
 
Sounds like to me there wasn't enough coolant in the engine the first time around. What was the tq on the head bolts? Congrats on getting it running. Nothing worse than watching all that money go down the crapper.
 
drilling 1/8" hole in the thermostat flange and installing it at 12 o clock really helps
 
Back
Top