4.6 engine info

[Cadillac Tech]

Service Information



Engine Mechanical - 4.6L (LH2) | Specifications | Document ID: 822440
Engine Mechanical Specifications


General

• Engine Type

V-8

• Displacement

4.6 Liter



279 cu in

• RPO

LH2

• VIN

A

• Bore

93 mm



3.661 in

• Stroke

84 mm



3.3071 in

• Compression Ratio

10.5:1

• Engine Compression Test

965-1172 kPa



140-170 psi

• Firing Order

1-2-7-3-4-5-6-8

• Spark Plug Gap

1.270 mm
0.0500 in





Lubrication System

• Oil Capacity - with New Dry Oil Filter

7.6 Liters



8.0 Quarts

• Oil Capacity - without Oil Filter Change

7.1 Liters



7.5 Quarts

• Oil Pressure - Minimum @ Idle

35 kPa



5 psi

• Oil Pressure - Minimum @ 2,000 RPM

250 kPa
35 psi

 

[carterchapman]

Thanks - that answers my question about my 20 PSI oil pressure at idle, hot engine.

 

[Cadiblk]

Thank you for the information. Has anyone looked into the performance benefits (if any) of having the heads ported / polished, changing a cam bore stroke, or any other top end work? D3 has limited products for the standard XLR and I was interested in trying to squeeze out some extra horsies!

 

[elkyman70]

Am not sure but is the cylinder numbering start at 1 on the passenger side rear ond of the engine compartment with odds in the back and evens in the front with 2 also starting the passenger side?