Panhead and Flathead site | Knowledge Base: Motor: Bottom End

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	Brakes (181)		Exhaust System (125)		Motor (156) - Bottom End, Crankcases (276) - Top End, Cylinders (393) - Cylinderheads (296) - Gear Case, Cams (156) - Lubrication System (425)

Specific Motor categories:
Bottom End (cases and crankshaft)
Top End (cylinders, pushrods etc.)
Cylinderheads
Gear Case (cams, idlers, cam cover)
Lubrication System (oil feed pump and scavenger pump, reservoir, filter, and lines)

Bottom End (cases and crankshaft): 276 topics

'48 pan crankcase oil leak

'54 crankcase rollers

'61 Pan...can I turn the crankcase vent tube ?

1942 WLA balance factor

1948 panhead flywheel end play

1951 Flywheel timing mark question

1951 pan engine case leak

1952 pan sprocket shaft seal

1953 Panhead sprocket shaft change

1954 left case no oil drain plug

1956 FL tappet screen missing

1958-1962 right case

1962 Panhead cases..

1963 FL front engine sprocket seal

1965 crankcase vent

48 Panhead pinion race

49 EL Engine question

49 Right side case

54 panhead belt drive needs mainshaft seal

57 panhead flywheel timimg marks

58 Panhead, primary breather pipe

58FL engine disassembly

59 pan primary drain tube

61 left side case?

61 pan tappet screen

65 Tappet oil passage

Adjusting Crane hydraulic units

Advice on breather hole bore / reed valve breather

Allowable play in front connecting rod??

Aluminum -vs- Steel Lifter Blocks on a 1951 Pan

Aluminum in tappet screen

Another bloody oil leak

Bad case of cases

Big End Seal leak?

Blind case bolt hole has a crack

Bonneville brand cases

bonneville cases

Bottom end Assembly

Bottom end condition

bottom end question

Breather filter or T tap

Breather modification to avoid the breather misting oil

Breather pipe for Pan motor w/ open primary

Breather screen

breather screen & separator when installation?

Breather tube & belt drive

Broken Left Side Motor Case

Buying Used Flywheels

Can primary vent be plugged off ?

Can't set up flywheel endplay

Case exploded! This can't be good

Case finish after welding

Case lapping tool

Case Oil Screen bit me

Case repair fitness evaluation

case repair shop --50 FL

Cases Installation

Cases matching (61" with 74")

Cases...to repair or not to repair

Causes of Oil leaking from rear tappet block?

center case stud

Cleaning (de-oiling) cases

Cleaning inside the cases

Connecting rods

Cotten! Ya been here before?

CPC Engine Case

Cracked case repair: can this crack be safely welded

Cracked tappet guide

Crank case breather

Crank Case Check Valve

Crank case markings

Crank Case Repair?

Crank oil seal leaking

Crank pin roller retainer material

Crank pin washers

crank vent on 65FLH

Crankcase breather options

Crankcase breather pipe and belt primary

Crankcase breather pipe set-up

CRANKCASE BREATHER QUESTION

Crankcase breather redirect and belt drive

Crankcase Breather Vent Tube

Crankcase breather vent tube 2

Crankcase bushing right side

Crankcase Motor Mount Welding

Crankcase not venting correctly

crankcase shims

Crankcase ventilation

Crankpin advise needed

crankpin tapers

Crankshaft /flywheel problem - help requested

crankshaft thrust washer clearance question.

Cryogenic treatment cases

cylinder base and cam cover nuts/bolts (custom )

Does a 52 pan have BOTH front & rear cylinder timing marks?

Dowel Pin size.

early panhead cases can you convert to timken bearing wheels

Engine case seal

Engine main seal

Engine Sprocket Seal

Flywheel assembly

Flywheel Assembly...

Flywheel assy, Balancing.

Flywheel Balance Factor

flywheel balancing

Flywheel question

Flywheels, stock or lightweight?

Front Crankcase to Frame Bolts

Honing a lifter base

hydraulic tappet insert

I think I've got a Shovel crank in my Pan...

INSPECTION hole broken (panhead)

Leaking timing gear cover

Left case primary mod question

Left side sprocket seal

Lifter Block Bolt Hole Repairs

Lifter question: solid of hydraulic

line lap question

Location of balancing holes in flywheel?

Location of crankcase vent on 62

Lower end timken setup, bearing preload/play 1959FL

Main Seal Leak on 1961 Pan FLH

Matching the engine cases

Metal in my oil question *Now with Pics*

Mis-matched cases,early pan

Mismatched crankcases

Need to lower end work?

No flywheel marks

oil leak at tappet block

oil leak froms sprocket shaft side of cases

oil pump drive gear shaft bushing

Oil restrictor for 50FL bottom end?

Paint the inside of the cases

Panhead '49: belly seam begin to leak oil

Panhead 1952 Case ...

panhead bottom identification

panhead breather tube

Panhead engine cases - painted or not?

Panhead flywheels

Panhead Oil Separator and Screen Questions

Panhead Right Side Case Boss???

Panhead trivia question?

Pankenstien fitment of cases, flywheels and shaftssss

Pinion nut torque

pinion shaft bearing side play

Pinion shaft nut torq

Piston Boss Orientation

Piston wrist pin reamers

Prefered method of sealing cases?

pressure build up in lower end

Presurising Lower End with a Grease Gun

Problem with Lifter Blocks

Push rod end size question

Question about my cases

Question about sprocket shaft bearing nut

Question about sprocket shafts

quick timing question

Real crappy set of 49 cases.

Real nice set of 59 cases.

Regulator/timer adjuster mount

removal of pimion shaft

Replacement Left Side Case?

Replacement lifter block -Oil passages?

replacing engine seal

RHS Crankcase on Panheads

right case bearing washer clearance

Rod End Shake - Too much?

rod roller question

roller to timkin conversion

S & S Reproduction Engine Cases

Salvaging flywheels

seperator and screen

setting up the bottom end

shovel cases panheads amd no oil to the heads

Shovel left case mated to a pan right side case

Shovelhead lifter block on '51 Pan?

side play between rod and flywheel

sidecar front end Timken bearing question

Sloppy connecting rods

snapped pinion shaft

Specialty tools

Splitting cases

Sprocket Shaft / flywheel Question

Sprocket shaft bearing nut

sprocket shaft bearing nut 24031-55

Sprocket shaft leakage q

sprocket shaft seal

Sprocket shaft: which shaft use to align

Sproket shaft seal renewal procedure ?

STD cases and sumping issue

STD cases: need help

STD gen/alt panhead type case, pinion bearing spec?

Stock flywheels 1951 pan

Stripped timing hole

tappet block fitment

Tappet block screws loosening

tappet bore wear

Tappet diameter

Tappet guide fitment

Tappet question

Tappet Roller Side Clearance

tappet rollers R&R

Tappet screen screw leaking?

Tappet screen with or without checkball?

Tappet to guide clearence ?

These look interesting.

Thoroughly confused... Breather tube won't fit

Timed breather gear

Timing cover question

Timing hole plug finally blew out

Timing inspection hole

Timing plug: take out with the motor running

Timken Bearing Replacement

Timken left case bearings 56Pan.

TOKO brand tappet assemblies

ul flywheels in my pan !!

used flywheel assembly

V Twin Sifton Tappets

V-TWIN REPLICA CASES

VelvaTouch lifter kits

Welding front motor mount.

What does this timing mark mean?

What is the crankcase breather separator/screen for?

WHAT SIZE THREAD ?

what year flywheels

Who does good engine case repairs?

Worn tappet blocks

Worried about tappet rollers

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