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Finally Cracked the Block

16K views 82 replies 38 participants last post by  Pocket  
#1 ·
Well my trip to Bandimere took it to it's grave. Cracked on the first run just past the 1/8th mile mark with no sign of damage other than a "Pop". I first thought it was a boost hose or something but after checking everything in the pit's I could not find anything wrong. Maybe it was just a Nitrous pop so I dropped my second stage down and ran again and no pop or unusual behavior with a .04 slower run. Well checked the engine again in the pits and everything was fine. Back to the larger jet for my first elimination. Truck was running fine staged with my 15.00 rival in the left lane, he had a slow reaction so I hit the 2nd stage a little late just to get the win and truck ran perfect.

Now this is where it baffled me. I pulled next to the trailer and let the truck idle for about 5 min to cool down like I always do and it sounded normal but after I spent about 15 minutes checking the oil, refilling the water and airing the tires my group was called so I get in the truck and turn the key and I hear about a 1/4 turn and it stops. :confused: So I get out and put a large TQ wrench to the crank just to see if it was a fluke and it turns in the reverse direction 180 deg's and stops. Turns back 180 and stops. Looked at the res and I'm down a few inches.
 
#11 ·
Sorry to hear that. So many 7.3s going down lately............Hey at least the 7.3 has its own theme song..............




Do....Do....Do.......Another one bites the dust........:D
 
#12 ·
I was visualizing installing a cummins in my truck but fortunately I woke from that horrible dream. The runs I made with a damaged engine and a DA factor of 11,000 ft should put me right behind Mr. Lott in position #3 of the top 10 PSD's (with a single charger BTW). Remember this block has 84,000 hard miles on it and over 200,000 actual so it did live a long life.
 
#13 ·
How do you know it's a cracked block? Did I miss something?
 
#15 ·
Well, I think it did pretty damn good. And best of luck putting another one together. Might I suggest a generous helping of Hardblock?

It may be something else though. If you had a girdle it couldn't have broken the block. ;)


But seriously, you did some nice work with that thing. Do you have anything you're going to try a little different on the rebuild?

Good Luck.
 
#17 ·
That sucks man, best of luck getting it back together.
 
#19 ·
Sorry about that Mike. I was waiting and wondering exactly what happened, after that day at the track. It was a bummer you couldn't make it back up for Sunday.
At least Jacob was kind enough to take it right to Wide Open for you, so it will be fixed up soon enough!

And, by the way guys, I love my PSD and won't go with anything else under my hood. But........when that turbo lights on Alan's truck - Wow. It's way fun. Can't wait to see what it does with twins. Nothing wrong with a Cummins, as long as it's in a Ford.;)
 
#24 ·
Well that sux. Awesome run of it though. :rockwoot:

I think I'm gonna go the "Charles" route on the next couple of motors I do.
 
#25 ·
So I get out and put a large TQ wrench to the crank just to see if it was a fluke and it turns in the reverse direction 180 deg's and stops. Turns back 180 and stops. Looked at the res and I'm down a few inches.
Mike,

A hard stop, like obstruction or just a gradual bind? Also, when free, did it turn "harder" than normal?

One of my "Dockboy'd" :hehe: engines acted similarly. When I tore it down, the main webs were broken and the crank was bent. It was still running when I tore it down and in fact, ran an 11.9 a couple days before. The reason I started investigating it was it had become very hard to turn over when starting and had a small amount of coolant in the oil.

Good luck Buddy:D
 
#28 ·
Thanks for the support everyone.

Charles: I will fill the block some but not sure how much since I still want to drive it on the street. The bearings on all the tear downs looked very good so the girdle did what it was designed to do. The combo and tuning should put me in the low 11.8's on fuel and 3-4 tenths lower on nitrous at sea level. This is still a conservative combination and should hold together a few seasons.

Mech: The glow plugs were pulled and It still was binding. Oil on the dip stick rose 2" after it sat for a few days. So it had to find a way into the pan. Until it's pulled apart I guess it's still speculation but a pretty strong chance.
 
#30 ·
Say it ain't so. Dang, and it ran so darn good. Glad you woke up form that nightmare and are keeping the dinosaur 7.3.