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CutterUp Diesel Lab
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58 contributions to CutterUp Diesel Lab
18d •
Decking a block
How far can I deck the early Cummins block? I see they make .020 thicker gasket so I imagine at least that far. My thought was decking the block to bump up compression by reducing piston to head clearance. But if I over decked the block then set my clearance by milling the piston tops then I could also reduce bowl volume and further increase compression. Even if I could get away with decking it .030 or .040 I'd be in the money I think
1 like • 9d
@Brent Nowell higher compression generates more heat during compression stroke making it easier to start on colder days as well as less white smoke due to more complete combustion. Your off boost drivability improves slightly as your engine is more thermally efficient prior to your turbo spooling. If u are wanting lower hp this I feel will be ok. If you are going for Horsepower yes you will see more heat and I personally would o-ring to prevent blowing a head gasket at higher HP. My build I am planning on 650hp and have went the fire ring way. I still am planning on stroking it with a 6.7l crank and will have my pistons valve cut for the purpose of quicker spool up with a 175 p-pump. Also depending on how much you are decking it will drop ur lifters and u will want to check ur tolerance on your push rods as they will become longer the more you take off.
0 likes • 9d
Correction I went with the O-ring due to my horsepower goal.
11d •
Time to work on trucks?
Well, we’re not quite there yet or definitely steps closer. Quick progress video.
0 likes • 10d
@Robert Winkworth probably live with out or pay more intelligent people who can lol.
1 like • 10d
Same fight we all have. Time or money. Neither one do we ever have enough of lol.
23d •
G56 rebuild part 2
Ok finally said enough dicking around, bearings have been here for 3 weeks, hunting or not this needs to be done. Sunday night drained tcase and tranny Removed front and rear driveshaft -I can’t believe it but even with 340k these u joints are fine including the cv on the front Monday night Supported tranny with atv jack and blocks of wood/ratchet straps Removed tcase and cross member Tuesday night Pulled granny and got it out. Checked primary shaft end play while cold -5 thou Split the cases Check out the bearings, they are done. I am sooo glad I did this. All gears look good so far
1 like • 17d
@Brent Nowell great idea going through all the gears before installing it back into the truck.
24d •
Last week
Well I take a couple days off last week. Needed to clear my mind. But I did get some work on the shop. It’s starting to look like something now. Finally.
4 likes • 24d
Still hopping alone got bored and made this with an old Mahle 5.9 piston over the weekend.
0 likes • 18d
@Robert Winkworth we all understand that. As things get put in place and sealed up it always becomes smaller haha.
30d •
What’s everyone up too ?
I am so busy with moving / packaging Building heads and engines. Learning the new machine. Oh ya and trying to finish the shop at the same time lol. Good times
3 likes • 30d
Just been watch lots of fabrication and rat rod builds while waiting for this freakin leg to heal.
5 likes • 30d
Other then that mostly staring at my build as I have dry fitted each piece as it comes in so that I only have to paint once lol.
1-10 of 58
@addison-wood-1000
From Alberta Canada and I'm currently working on rebuilding a 12v Cummins which I plan to put into my 1938 Chevy 1.5T
Active 20h ago
Joined Jan 19, 2026
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