HitCast

This one was a felpro 9522pt

Head gasket decided it didn’t wanna seal anymore this morning on my way to work yippie!

I bumped the idle and so far so good! During this process I put some new 7x.012 sacs that are set to p pump pop pressures as well. Truck spools way faster than before and seems to start easier, I seen a guy selling H pump swap kits and apparently those are like p pumps but have electronic timing advance? I thought that’d be pretty slick if a guy could get the programming done

Headgasket all installed timing reset! It was at 42 degrees… reset to 19. Now when I put it into gear it immediately dies. Would retarding the timing cause this without resetting the idle?

Here’s the failed head gasket, going to check timing in the morning and see what it looks like!

Most likely the same then I’ll find out this weekend what the timing was set at and let y’all know I feel like it’s gonna be pretty high….

Here’s the chart I found, I don’t have a cpl for the engine this pump came off of so it’s hard to tell. All I know it’s a 912

Well, that’s where things get a little messy when I did the p pump swap I used a degree wheel on the crank. But accidentally retarded it and I advanced it till it ran good. I might have went a little crazy with it but it ran great since May with no issues. I bought a dial indicator to time it with lift on the chart do you know where a 912 180hp ca pump would fall?

Local Cummins doesn’t have factory gasket and it’s back ordered so I don’t think that’s much of an option. Local parts stores all have mahle composite p# 54174 and felpro MLS 9522pt don’t the newer common rails run an mls would this be an upgrade over a conventional gasket?

That’s what I was thinking because when it popped is when it hit lockup and pulled the motor down and high timing + lower rpm + boost = no good. What do you recommend for a headgasket? The one that just blew was a mahle and was the only thing I could get on Christmas Eve.

Update: replaced o rings on injectors and crossover tubes, starts in the morning now. Took it for a drive today hit lockup and blew the head gasket at 40psi…. Same place on the back of the head.

I forgot to update my sig that I went to 4.10’s last month. I’ll check that t fitting on the return side, overflow valve is only a few months old it would be a weird coincidence that it went bad the same time the head gasket did maybe tonight I’ll pinch the return and see if it starts in the morning

First off I hope everyone had a merry Christmas! Mine was eventful blowing the head gasket on the truck, and then finding out the head had cracks in 5 of the 6 cyls of the head. Replaced head and now it runs great. No external leaks but it sucks air and looses prime within a few hours. being this weekend was Christmas/eve I couldn’t get injector orings or connector tube orings. Could these be a source of the air leak? I changed the banjo washers on the back of the head with no results.

Sad part is, I rebuild them for a living and had never seen this issue before

Update 300 miles after installing new output speed sensor no issues so far. Seems to have cured the issue. Weird how no codes set or anything