Compression Check

Started by hakcenter, March 19, 2016, 05:09:08 PM

hakcenter

So wow, this pump is freaking awesome. I will have to find out what gov springs he put in, cause they are an absolute dream. I have full control idle to 4k anything in between. No super sensitive pedal.. nada

Still got that white haze smoke though, I dunno what to do. It certainly smells better since the pump though.
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

Rx7man

I should get my pump benched at some point.. I know one cylinder is off balance by a bit, you can hear it at idle
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles

hakcenter

I used to have a strange injector rattle at idle. Used to be every 3rd rotation. Completely gone now... Truck drives like a beast. I need to find out what gov spring set he used
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

Rx7man

I've used the BD 3K set and the pacBrake  in 3k and 4K configurations, known to be a PITA and I've just never had a problem.. Stock springs were positively miserable, the truck would buck like a bronc at low revs
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles

hakcenter

#19
My govs were so messed up that when I went from 4k to 3k (just removing the small spring) my truck couldn't even start on it's own yet it idled the same rpm so tension was right /shrug
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

hakcenter

I finally decided to just give up and tear the sum bitch down. Head has some cracks at the exhaust valves, cylinder 4 lost it's valve seal, and the spring that holds it on.
Found 1 piece in the lifter tappet area, and the other directly under the seal /lucky

Time for a full rebuild, pistons look god awful anyways. So much blow by between the compression rings.
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

Rx7man

My truck started to get a bit of blowby on my trip.. not terrible, and I had a good load on, but it kinda felt like the power was a little bit soft.. wondering if I have a broken ring or something.  First things first is that F(&(&ing Cummins head gasket is leaking under #6 externally, perhaps there's something internal happening as well and that's where the blowby is coming from?  Gonna have to do a compression check on it I guess.. have to buy a tester, pull the injectors.. AGAIN, then pull the head and see what things look like... I'm never using a Cummins gasket again after 2 in a row that fail within 60,000 miles and the first one taking the engine with it.
Joy joy.. Once I get all the toys I bought off the truck I'll take another spin with it and see if it's actually down on power or if it was the weight and my turbo tune wasn't aggressive enough

Oh yeah, on my trip I totally broke the drivers side engine mount.. who knows how.. right side mount had 2 bolt heads snapped off, 3rd one was loose, then my starter packed it in.
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles

Rx7man

Just did a compression check on my truck... all cylinders were 440PSI +/- 5 except for #2 cylinder, that was at 390.. so I know where my blowby is coming from now.. hopefully it's just a bad ring and the cylinder is OK still.. it's the same cylinder that had the bad injector last fall, but it ran fine after I replaced that injector.. still an odd coincidence.. Bear in mind my truck is 18:1 compression so that's why it has higher numbers all around.
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles