Well, as some of you may know by now, I "killed" Turbo Slug's engine at the track about a month ago.
I've been lamenting the experience on YouTube since:
https://youtu.be/-ntGyh9gKVk
https://youtu.be/SiOMVnNg3-4
https://youtu.be/5whnnISWNrM

I have now dropped the engine:
https://youtu.be/2soKocY14AY

And started stripping the thing down. (Video soon)

I have the basic engine rebuild specs but I would like to know if anyone can give me detailed crankshaft journal / endfloat / regrind specs?
I need to evaluate if it's possible to get a French machine shop to do the work?

Thanks for your help and best regards,
Rafe
😉

------------------
"Turbo Slug" - '87 Fiero GT. 3800 turbo. - The fastest Fiero in France!
https://www.youtube.com/cha...1wZvWQlkYxTjivW_0XNg

I've just finished stripping down the engine.

Here is my question:
If the big end rod endfloat exceeds 0.5mm, is the crank junk?
I have 0.6 to 0.75mm, depending on where you mesure.

There is no point regrinding the crank if the rods are going to flop around from side to side outside safe tolerences, even after the machining.
As was said previously, I don't have a whole lot of data on this 3800 engine?
I'm going on what info the Haynes gives.

Any engine machining data would be a great help to me.
Thanks,
Rafe👌😉

------------------
"Turbo Slug" - '87 Fiero GT. 3800 turbo. - The fastest Fiero in France!
https://www.youtube.com/cha...1wZvWQlkYxTjivW_0XNg

Hi everyone,
Found this info in an old Pontiac forum.
I'm just going to post it here if anyone else needs it:

General Data
• Engine Type 90° V-6
• Displacement 231 cu in
• Liter (VIN) 3.8L (K), (1)
• RPO L36, L67
• Bore 96.52 mm 3.8 in
• Stroke 86.36 mm 3.4 in
• Compression Ratio (VIN K) 9.4:1
• Compression Ratio (VIN 1) 8.5:1
• Firing Order 1-6-5-4-3-2

Lubrication System
• Oil Capacity with Oil Filter Change 4.25 L 4.5 qt
• Oil Capacity without Oil Filter Change 3.75 L 4 qt
• Oil Pressure @ Operating Temperature (1850 RPM) Using 10W-30 Oil 414 kPa 60 psi min
• Oil Filter Type Throw Away Element and Can
• Gear Pocket Depth 11.71-11.75 mm 0.461-0.4625 in
• Gear Pocket Diameter 89.10-89.20 mm 3.508-3.512 in
• Inner Gear Tip Clearance 0.152 mm 0.006 in
• Outer Gear Diameter Clearance 0.203-0.381 mm 0.008-0.015 in
• End Clearance 0.025-0.089 mm 0.001-0.0035 in
• Valve-to-Bore Clearance 0.038-0.076 mm 0.0015-0.003 in

Type of Lubrication
• Main Bearings Pressure
• Connecting Rods Pressure
• Piston Pins Splash
• Balance Shaft Bearing - Front Splash
• Balance Shaft Bushing - Rear Pressure
• Camshaft Bearings Pressure
• Timing Chain Splash
• Cylinder Walls Splash
• Oil Pump Type Gerotor
• Oil Pressure Sending Unit Electrical
• Oil Intake Stationary
• Oil Filter System Full Flow

Cylinder Bore
• Diameter 96.5 mm 3.8 in
• Out-Of-Round Maximum 0.0254 mm 0.001 in
• Taper 0.0254 mm 0.001 in

Piston (VIN K)
• Used Piston Clearance (41 mm from Top of Piston) 0.050-0.091 mm 0.0020-0.0036 in
• New Piston Clearance (41 mm from Top of Piston) 0.010-0.051 mm 0.0004-0.0020 in

Piston (VIN 1)
• Used Piston Clearance (41 mm from Top of Piston) 0.0193-0.0997 mm 0.0008-0.0039 in
• New Piston Clearance (41 mm from Top of Piston) 0.0207-0.0437 mm 0.0008-0.0017 in

Piston Ring Groove Depth
• Top Compression 4.019-4.146 mm 0.158-0.163 in
• 2nd Compression 4.214-4.341 mm 0.0166-0.171 in
• Oil Control 3.814-3.941 mm 0.150-0.155 in

Piston Ring End Gap
• Top Compression 0.25-0.46 mm 0.010-0.018 in
• 2nd Compression 0.58-0.84 mm 0.023-0.033 in
• Oil Control 0.254-0.762 mm 0.010-0.030 in

Piston Ring Side Clearance
• Top Compression 0.033-0.079 mm 0.0013-0.0031 in
• 2nd Compression 0.033-0.079 mm 0.0013-0.0031 in
• Oil Control 0.023-0.201 mm 0.0009-0.0079 in

Piston Ring Width
• Top Compression 1.176-1.197 mm 0.0463-0.0471 in
• 2nd Compression 1.476-1.497 mm 0.0581-0.0589 in
• Oil Control 1.854-2.007 mm 0.073-0.079 in

Piston Pin (VIN K)
• Diameter 21.9950-22.0000 mm 0.8659-0.8661 in
• Clearance in Piston 0.0020-0.0130 mm 0.00008-0.00051 in
• Fit-In-Rod (Clearance) 0.0066-0.0217 mm 0.0003-0.0009 in

Piston Pin (VIN 1)
• Diameter 22.995-23.0000 mm 0.90531-0.90551 in
• Clearance in Piston 0.0065-0.0155 mm 0.00061-0.00026 in
• Fit-In-Rod (Clearance) 0.0073-0.0225 mm 0.00029-0.00089 in

Crankshaft
• Main Journal Diameter-All 63.470-63.495 mm 2.4988-2.4998 in
• Rod Journal Diameter-All 57.1170-57.1475 mm 2.2487-2.2499 in
• Main Journal Taper-Maximum 0.00889 mm 0.00035 in
• Rod Journal Taper-Maximum 0.00889 mm 0.00035 in
• Main Journal Out-of-Round-Maximum 0.00635 mm 0.00025 in
• Rod Journal Out-of-Round-Maximum 0.00508 mm 0.00020 in
• Main Bearing to Journal Clearance 1 0.0178-0.0406 mm 0.0007-0.0016 in
• Main Bearing to Journal Clearance 2, 3 and 4 0.0229-0.0457 mm 0.0009-0.0018 in
• Rod Bearing Clearance 0.0127-0.0660 mm 0.0005-0.0026 in
• Crankshaft End Play 0.076-0.276 mm 0.003-0.011 in

Connecting Rod
• Rod Side Clearance 0.102-0.508 mm 0.004-0.0200 in
• Connecting Rod Large End Bore ID 60.295-60.312 mm 2.37378-2.3745 in

Camshaft
• Journal Diameter 47.655-46.858 mm 1.8462-1.8448 in
• Bearing Inside Diameter 1 and 4 46.970-46.934 mm 1.8428-1.8492 in
• Bearing Inside Diameter 2 and 3 46.977-46.942 mm 1.8481-1.8495 in
• Bearing-to-Journal Clearance 0.041-0.119 mm 0.0016-0.0047 in
• Intake Maximum Lobe Lift 6.56 mm 0.258 in
• Exhaust Maximum Lobe Lift 6.56 mm 0.258 in

Balance Shaft
• End Play 0.0-0.171 mm 0.0-0.0067 in
• Rear Journal Diameter 38.085-38.105 mm 1.4994-1.5002 in
• Radial Play-Front, Bearing Clearance 0.0-0.026 mm 0.0-0.0010 in
• Rear Bearing to Journal Clearance 0.012-0.109 mm 0.0005-0.0043 in
• Drive Gear Lash 0.050-0.125 mm 0.002-0.0049 in
• Bearing Bore Diameter-Front 51.973-51.999 mm 2.0462-2.0472 in
• Bearing Bore Diameter-Rear, In Block 47.584-47.612 mm 1.8735-1.8745 in
• Bearing Inside Diameter-Rear 38.118-38.194 mm 1.5007-1.5037 in

Valve System
• Lifter Hydraulic Roller
• Rocker Arm Ratio 1.66:1
• Face Angle 46 degrees
• Seat Angle 45 degrees
• Minimum Margin 0.635 mm 0.025 in
• Seat Runout-Maximum 0.050 mm 0.002 in
• Seat Width-Intake 1.53-2.03 mm 0.060-0.080 in
• Seat Width-Exhaust 2.29-2.79 mm 0.090-0.110 in
• Stem Height-All 49.15-50.17 mm 1.93-1.975 in
• Stem Clearance-Intake 0.031-0.071 mm 0.0012-0.0028 in
• Stem Clearance-Exhaust 0.036-0.074 mm 0.0014-0.0029 in

Valve Spring
• Free Length 49.78 mm 1.960 in
• Load-Closed 334 N @
43.69 mm 75 lb @ 1.72 in
• Load-Open 1014 N @ 32.4 mm 228 lb @ 1.277 in
• Installed Height 42.93-44.45 mm 1.690-1.750 in
• Approximate Number of Active Coils 4.48
• Approximate Number of Total Coils 6.60

Flywheel
• Runout-Maximum 0.38 mm 0.015 in


So to answer my own question, it would seem that my 0.6mm+ rod endfloat is too much?
You're welcome!

------------------
"Turbo Slug" - '87 Fiero GT. 3800 turbo. - The fastest Fiero in France!
https://www.youtube.com/cha...1wZvWQlkYxTjivW_0XNg