planning on camming... bigger injectors so adjust pressure too
Wow engine looks like it sat on the bottom of the ocean. I'd take a good hard look at the rust on that regulator/fuel rail and replace it if it's questionable.
Swap info:
- The L18 8.1L has the same foot print as older BBC engines and will bolt in the same as any other older SBC and BBC. In fact, the L18 will accept any exhaust manifold or header from older BBC engines. The starter motor from any older SBC and BBC for use with a 168 tooth flywheel will also fit the L18. Any transmission from an old PowerGlide, TH350, TH400 to Allison, to NV4500, etc. will bolt on to it as well.
Sadly, I've pro been chasing these issues due to this the entire time. It has been a long road but at least at this point I know everything except the block at brand new... Here's the part number and application I ordered. It covers a lot of models but should be correct for my application.
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As I’ve been prepping @ZooMad75 8.1 the past few days I was able to grab a few clear photos of the method to remove the oil bypass valve for those that chose not to run engine oil coolers…or just simply don’t have the real state to mount a cooler anywhere. The update is at the bottom of Post 24 on Page 2 of this thread
there, this is cleaner.. and fyi... I haven't done it yet so I cant vouch for the credibility of some things... thus the sensor replacement.. ill check it after truck is in but will replace while out. I also read that they starting making one with the connector on a 90 degree bend so will make sure that is what I get...
this is actually in the 8.1L resource thread but I want to pull it into here as I'm going to also update some pieces...
Ok adding my section to this. Was going to do my own but figured id stick it in here as it is not a high traction 5 million post thread. anyway.. I got through 3 pages to answer some of my questions. Got 13 more to go but gotta cook on the grill and family/eating time.be back later but thought I would share my notes I am taking.
correct me if I have some things wrong please..
this is jotted notes and all over the place. Tried keeping it somewhat organized and will clean it up later when things are confirmed...
8.1L parts...
* High Pressure fuel pump - EP381 Fuel pump
* fuel supply and return 2001 - 2003 The Workhorse part numbers for these lines are W0000539 Supply, W0000540 Return.
* regulator - built into 2001 - 2003 fuel rail
* Motor Mounts - Energy Suspension engine mounts - Energy Suspension 3.1116R
* Motor Cross Member - ORD GU32005
* Clutch stuff - 8.1L specific flywheel and pilot bearing (12582964 is the flywheel, 12563485 flywheel bolts & 12557583 pilot bearing). Supposeldy TBI 350 flywheel is internal balance thus should work and will find out
* EGR Block Plate
* Crank Sensor - can replace in truck against myth that you cant
* Accelerator pedal - can use gas pedal but 6.5 turbo diesel is a direct bolt in and 2 pins are different (pin A to J and J to A)
*mount pcm - 15764028 BRACKET - PCM W0007848 BRACKET - TCM 15003790 x2 BRACKET - TCM legs
Notes
* fuel lines - supply from motor 4-5 feet then put a filter in, click it in then take another hose and click it in and run to float assembly
* There is a small nub on the driver’s side of the engine that will need to be ground down just a tad so the engine mounts will bolt to the engine.
* Trans - SM465 - pull guide pins and will bolt to motor
* Clutch - use current sbc 350 pressure plate, clutch, etc? read need to drill holes for metric bolts for clutch?
* Exhaust - I don’t recommend using the 8.1L exhaust manifolds as they will hit the frame on an older truck. Any big block header or exhaust manifold (396, 402, 454, etc) will fit the 8.1L.
* Alternator - wire for charge goes where? gonna be bigger than my 60a I assume...
* Reading that low mount AC hits frame, but I do not need AC and have this style bracket - just remove and smaller belt.
Wiring
* Where to mount pcm - The Workhorse W0000393 ECM housing is the plastic piece the ECM snaps into.
I just used the TCM bracket as a cover per’se.
15764028 BRACKET - PCM
W0007848 BRACKET - TCM
15003790 x2 BRACKET - TCM legs
The 8.1L PCM is capable of managing dual fuel tanks. Get a tune from a cab and chassis 8.1L truck equipped with dual tanks, provide a fuel level signal from each tank and the PCM will operate your existing transfer pump to maintain the level between the two tanks. The PCM just controls a fuel pump relay for the transfer pump.
* My suggestion is to have them toggle off Torque Management, Toggle off EGR (and remove it from the engine), then add their “Hot” tune.
* Then when you get it running bump the fuel pressure up to about 67-68 psi and you’ll have a very strong runner that will start to find weaknesses elsewhere in your driveline .
Imma cheap-ass sum bit redneck... (actually father of 2 with sports, wife, bills, etc... ) so this is my budge 8.1L swap. I know others say you can get a motor for $1000 but expect to pay 2-3x that to install it... EFFFF DAT!!!!!
************************ Parts Purchased *****************************
2001 8.1L motor/harness/pcm/etc - facebook 8.1L group $1200
Motor Mounts: Energy Suspension 3.1116R - Amazon $55
ORD Big Block Engine Cross Member - ORD $223.50
2002 Silverado diesel gas pedal - car-parts.com $60
6AN Billet Fuel Filter - amazon - $10
AN6 stainless braided fuel line - ebay - $50
454 stock exhaust manifolds - friend - $45
EP381 fuel pump - amazon - $30
12563485 flywheel bolts - amazon - $10
2557583 pilot bearing - amazon - $20
Exhaust gaskets - fel-pro MS95840 - $13
Crank Sensor - duralast - SU1394 - $56Wires - Duralast lifetime - 4711 - $32
Rear main - Fel-Pro - 8540673 - $24
12559976 EGR Cover - thatgmpartsguy.com - $7 - $4 ship
12580673 EGR Cover gasket - thatgmpartsguy.com - $5
______________________________________________________________
Total.................................... $1844
************************ Parts Expected to Purchase *****************************
harness rework and "Hot Tune" - facebook guy - $300
true dual exhaust with stacks/flaps between rollbar - local - $300
Russell #644123 and #644113 to adapt 6an lines the the stock 8.1L rail
______________________________________________________________
Total.................................... $2444
Damn, that thing is crusty!aight.. new parts always look nice.
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so I have one bolt that i bought a long time ago... so i can put my flywheel on. lol
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so question. this is the newer crankshaft sensor right? looks it...
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Damn, that thing is crusty!
I'd get a new crank sensor even if you think that one looks newer than the engine. You ain't getting that sucker out in the truck very easy. If you pull it and it has 3 o-rings on it, that would indicate it's a early sensor that you want to replace anyway. Those are known to stick and or break. Better to do now than later.
Yeah, if the a/c compressor is mounted low, it's not going to fit. It's why most that want to keep a/c without chopping the frame for clearance you'll need the Workhorse/medium duty accessory brackets.also ac tensioner hit front cromm member. wont once engine is pushed back but dont think ac will clear. i dont have ac so gotta remove it anyway....
I put pictures of both styles in my thread. You can tell the difference without pulling because the connectors are 90 degrees different. But a newer one in an '02 could also be aftermarket, so still good to check.so question. this is the newer crankshaft sensor right? looks it...
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