mhuppertz

Ok, my machinest advised that we do not mill the head because it has conformed to the block. Thoughts?
-mark

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MARK
1993 W250 Club CAB LE , HTT Stage IV/16cm, POD's, Tweaked Pump, open exhaust, NV4500, Borgeson, Detroit Locker, 3" Isspro Pyro, Surplus Boost Gauge, 3,200 Spring, BHAF, Air Lift, Luber-Finer Bypass Filter, Illegal Headlights, "clearenced" afc pin, lots of broken parts, piston lift pump, dribble filter, ~350K miles. Gear Vendors out and waiting for rebuild.. Detroit Locker.

torquefan

Wow, never really heard that line of thinking before. I generally go over each surface carefully with a straightedge and feeler gauges first, before I decide whether a head needs to be sent for machining. Have seen many heads that needed straightening, but can't remember a block that needed resurfaced.

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1996 Ram 2500 Club Cab, 4x4, 5 speed, KDP tabbed, Prodigy, Silverstars with relay kit, BD 4" cat back, Autometer gauges.

I've donated.

schamran

Did he go over the head with a dial indicator?

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Stacked Red '92 4X4

427,000 Miles
5-Speed, 3rd gen IC (not recommended), 1/8" timing bump, hx-35, custom intake, 3" Downpe, 4" Transfer Case, 5" Stacks, DMI Quick N' Cusion bumper, 3rd gen alloys, 366 Spring
196 HP @2500, 475 TQ @1500 in Overdrive (Old Numbers) -Hopefully run again this fall

Blown head gasket. Back together this weekend hopefully. Also installing .020" thicker marine head gasket.




Randy

mhuppertz

He said if you are not going to mill the block (which I obviously can't do in frame) that milling the head is a mistake. I'm a little worried about the front passenger corner of the head where it tends to leak.

mhuppertz

Haven't pulled the head yet, waiting for the studs. He worked for Rocky mountain Cummins for a number of years back in the day. Like I have said elsewhere, he is one of the best engine builders/machinests in the country, and I really respect his opinion.... but he doesn't do performance diesels!

jimbo486

if the head comes off, i recommend it get machined. it will always be warped on the exhaust side, naturally, due to excessive exposure to heat. even if it only needs .001" to get it flat, it's worth it.

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"my name is jim, but most people call me.... jim"
- blazing saddles -

- '90 D350 LE Cab & Chassis -
- 366 Spring - M3 Fuel Pin - M&H Timing Spacer - 4x.014's - Piston LP - Banks I/C'd - Fluidampr - HTT Super 40/35 'gated 14cm -
- Stans 4" - '01 NV5600 - SB Con OFE Clutch - D70 3.54 LSD - Autometer Tach - UltraLite II Pyro & 60psi Boost -

Waiting List
- PS I/C, 3" Tubes -

263HP / 610ft. lbs. (Aug. '10)

Riesenbr549

Yes i agree, if in doubt Mill it!! Just get a .020 over marine gasket and you can take up to .020 off the head and still be at stock comp. Not to say that your guy is wrong . For a in chassis thats the norm. Mainly big truck motors thou. If he argues then ask him what 2 do if you put a new head on?? just saying...

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98 2500 12V QC 4X4 AUTO
97 2500 12V CC 4X4 AUTO
95 3500 12V CC 4X4 5-SPEED
93 W-350 CC 5-SPEED
91 W-250 SC 5-SPEED
89 W-250 SC AUTO / P-PUMPED AND MAXED OUT!!

JD730

Tell him to take off just enough to straighten it, according to the book your allowed to take off up to .020". If he doesn't want to do, find another shop that will. Don't forget to check if for cracks before you do any machining.


Wrong, .020" over gasket is used if you have to mill the block deck down to straighten it out. Thats why there are .010" and .020" gaskets, so you can cut the block twice if you have to, chances are you won't, but there's always the chance.

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Mike
That's not a leak, its the external lubrication system.
The "Rattle Box"
93 W250 Silver Club Cab, 47RH rebuilt by me with Goerend goodies, HTB2 62/12, hydroboost brakes, plus a few other things, 424/1039, 1/4 mile 14.00@94.3mph
2000 2500, 4x4, 6 speed, 12 valve, Homemade WH1C/HX55W twins
96 2500, Club Cab, AT
93 W250 Green Club Cab, AT
92 Club Cab, AT
07 2500, Quad Cab, 5.9L, Auto (Dad's new ride)
John Deere Two Cylinders, too many to list.

mhuppertz

I'm at high altitude, so a small bump in the static compression ratio would be a blessing.