Discussion in 'Lifted Suspension & Offroad' started by flatblack83, Mar 6, 2011.
When I blew my motor I had all kinds of piston pieces in the intake of my Maggie, glad I pulled it apart to check it.
Parts in the lower tub..? Shouldn't of gotten past the intercooler, it's a shame to open it. With a whole 5k miles on it.
yes, they were in the lower tub but also jammed between the intercooler fins from the bottom side. had to pick them out.
Damn thats some carnage there. It's gonna be badass when youre done tho. This truck is still one o fmy favorites on gmfs.
Yea its bad, i knew it was going to happen but not that soon. I hope its turns out like your saying..lol. If it performed a whole lot better it would be nice. I appreciate hearing that, i don't get too many comments. A few guys tho have been commenting since the beginning.
So.... What exactly happened/caused the stock bottom end to go boom??? Were you beating on it right then, just age, or a combo of age and running it hard!?! What kinda mileage did the bottom end have on it!?!
Before I get into this the early motors have powdered rods, not too strong. I think 99-03 are the powdered rod motors. Some hold big power and some don't. With the rods the suggested boost level is 10 psi and under. I was running 12 -14 for the last 6k miles and wasn't easy on it. It's was a fun ride and surprised alot of people. I should of kept the boost down and it would still be ok, i'll admit its 100% my fault. Also the reason the new motors and iron block with all forged internals. It has 143 and change on it and the last 10k with a supercharger. So it had a rough life, The connecting rod broke up at the wrist pin. When it broke the rod was slamming into the bottom of the piston. Crumbling the rod sending pieces all over. What did it in finally was trying to get it in the garage after the tow truck dropped it off. It shouldn't of been started again. I would of been able to save the oil pan.
Last night I measured for push rod length. I measured from 7.362 to 7.371, .009 in the differance. Adding .035 preload for my Johnson lifters gets me right at stock length 7.400. I have 7.400s in my old motor, i'm going to clean em and put em in. I'll fire it with them and if the valvetrain sounds fine i will order mantons in 11/32 to stiffen up the valvetrain. I'll have it all ready Sunday to drop in monday night. Maybe running by next weekend....
Well..... unfortunate, but you can build it much stronger now for the future and higher hp levels!
With it all being forged, all arp bolts n studs, bigger cam and being all new top notch stuff this should be exactly that. It is rated for 1k hp. I skimped no where on this, did alot of research and bought what was needed. The 408 has more clearance on the bearings and ring gaps for rpm and boost. With the trickflow heads, johnson lifters, rocker bushings and manton 11/32 pushrods the valvetrain will be pretty beefy. This maybe about it with rising power levels, i think i'll limit it at 12 psi and just run it. A few other small things like a 5 inch intake tube with 102mm throttle body will be in the works later in the year.
welcome to the club blowing motors and paycheques
Isn't that the truth...lol
Timing cover, flywheel, rockers, push rods, valve covers, coils with mounts and knock sensors windage tray spacers came to space it downsince it having the stroker crank and the arp studs. The pick up tubefit perfect and the oil pan went on. One item holding me up is a brokenmotor mount, so I'll be back at it Thursday when they come in.
That looks so sweet! And i hate gas jobs lol
What are you doing with old block? Making a table out of it?
Thanks, it's slowly getting there. Nothing wrong with a gas truck with boost..lol. the old motor I dunno yet, gonna knock it apart n see how bad it really is. May or may not be saveable....I'm closer to the may not..lol.
Going to use a set of poly mounts this time instead of stock ones. Atomic fabrication performance makes them for these trucks, He's the only one too. They are super nice thick steel with poly bushings. Since it will be a day or so till I get these I'll open up the super charger and check it for debris. Plus I have all the parts to do my big brake kit, so I'll swap the booster and pull the hubs apart.
Finally in its new home..lol. should be ready to fire soon..!!
Motor was all finished up Tuesday night, blower was really clean. It fired right up, 42lbs idle oil pressure and it's nice and smooth. Smoked like he'll for a few minutes, broke In and did 1st oil change. Has about 70 miles on it now, need 300 before it gets abuse. Brake kit worked out really nice too, welded the new and sensor mounts on and bolted up the new booster. Brakes work perfect with no abs light.
Very nice! Glad to hear it's all back together and running....
Thank you, i have about 200 miles on it now. Seems to run really good, the more its broke in the better it runs. Oil pressures good and the valve train is quiet. Another 100 miles and the break in period should be over, then the oil gets changed to joe gibbs driven 10w40. The brake kit has worked perfect too, the difference in braking has to be atleast 50% better.
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