Compression tests. 4.2 S4 Section 2003-2009

Year of the S4: 2008 B7 S4
Motor size: OEM 4.2
Mileage: 85,000 Mobil 1 0-40 every 5k

Comp Leakdown
#1 170 7
#2 170 10
#3 165 10
#4 160 10
#5 145 10
#6 145 8
#7 145 25
#8 160 12

The car was taking in 1 quart every 1k miles.

Year: B6, 2004 S4
Motor: OEM 4.2
Mileage: 123,600

Cyl 1: 132
Cyl 2: 148
Cyl 3: 140
Cyl 4: 150
Cyl 5: 142
Cyl 6: 142
Cyl 7: 151
Cyl 8: 148

Oil Change: Liqui Moly 5w40
Consumption: 1qt every 1200-1400 miles.

Year: B6, 2004 S4
Motor: OEM 4.2
Mileage: 123,600

Cyl 1: 132
Cyl 2: 148
Cyl 3: 140
Cyl 4: 150
Cyl 5: 142
Cyl 6: 142
Cyl 7: 151
Cyl 8: 148

Oil Change: Liqui Moly 5w40
Consumption: 1qt every 1200-1400 miles.

Going to have to check mine again, as my tech gave me the following figures - All taken when the engine was hot following a run after my timing chain overhaul.

Cyl 1: 195
Cyl 2: 200
Cyl 3: 200
Cyl 4: 200
Cyl 5: 180
Cyl 6: 180
Cyl 7: 200
Cyl 8: 200

Going to have to check mine again, as my tech gave me the following figures - All taken when the engine was hot following a run after my timing chain overhaul.

Cyl 1: 195
Cyl 2: 200
Cyl 3: 200
Cyl 4: 200
Cyl 5: 180
Cyl 6: 180
Cyl 7: 200
Cyl 8: 200

90k Miles
Castrol 5/40 Oil

Test carried out hot and wet (Fuel Supply Not Disabled)

90k Miles
Castrol 5/40 Oil

Test carried out hot and wet (Fuel Supply Not Disabled)

Year of the S4: 2005 B6 S4
Motor size: OEM 4.2 BHF
Mileage: 87,000
Oil Type/OCI: Mobil 1 0W-40 / 5,000mi
Consumption: ~half a quart every 5k

Compression: Leakdown%:
Cyl 1: 155 N/A
Cyl 2: 160 N/A
Cyl 3: 151 N/A
Cyl 4: 152 N/A
Cyl 5: 153 N/A
Cyl 6: 151 N/A
Cyl 7: 159 N/A
Cyl 8: 160 N/A

Year of the S4: 2005 B6 S4
Motor size: OEM 4.2 BHF
Mileage: 73,372
Oil Type/OCI: Castrol Syntec 5W-40 / N/A
Consumption: N/A

Compression: Leakdown%:
Cyl 1: 145 2
Cyl 2: 150 2
Cyl 3: 145 2
Cyl 4: 140 2
Cyl 5: 145 2
Cyl 6: 145 2
Cyl 7: 145 2
Cyl 8: 140 2

Year of the S4: 2005 B6 S4
Motor size: OEM 4.2 BHF
Mileage: 87,000
Oil Type/OCI: Mobil 1 0W-40 / 5,000mi
Consumption: ~half a quart every 5k

Compression: Leakdown%:
Cyl 1: 155 N/A
Cyl 2: 160 N/A
Cyl 3: 151 N/A
Cyl 4: 152 N/A
Cyl 5: 153 N/A
Cyl 6: 151 N/A
Cyl 7: 159 N/A
Cyl 8: 160 N/A

Year of the S4: 2005 B6 S4
Motor size: OEM 4.2 BHF
Mileage: 73,372
Oil Type/OCI: Castrol Syntec 5W-40 / N/A
Consumption: N/A

Compression: Leakdown%:
Cyl 1: 145 2
Cyl 2: 150 2
Cyl 3: 145 2
Cyl 4: 140 2
Cyl 5: 145 2
Cyl 6: 145 2
Cyl 7: 145 2
Cyl 8: 140 2

2005 B6 S4 Base
OEM 4.2L
Mileage: 163,000

Car was at temp
15 cranks per cylinder
Pulled the fuel pump fuse after car shut down

150 [4] ---- [8] 148
142 [3] ---- [7] 154
147 [2] ---- [6] 143
140 [1] ---- [5] 145

2005 B6 S4 Base
OEM 4.2L
Mileage: 163,000

Car was at temp
15 cranks per cylinder
Pulled the fuel pump fuse after car shut down

150 [4] ---- [8] 148
142 [3] ---- [7] 154
147 [2] ---- [6] 143
140 [1] ---- [5] 145

Compression test courtesy of b6dolphinS4!

Year: B7, 2006 S4
Motor: OEM 4.2
Mileage: 99,000

Cyl 1: 150
Cyl 2: 155
Cyl 3: 148
Cyl 4: 153
Cyl 5: 155
Cyl 6: 153
Cyl 7: 160
Cyl 8: 165

Oil Change: Liqui Moly 5w40

Compression test courtesy of b6dolphinS4!

Year: B7, 2006 S4
Motor: OEM 4.2
Mileage: 99,000

Cyl 1: 150
Cyl 2: 155
Cyl 3: 148
Cyl 4: 153
Cyl 5: 155
Cyl 6: 153
Cyl 7: 160
Cyl 8: 165

Oil Change: Liqui Moly 5w40

Year: 2004 S4
Motor: OEM 4.2
Mileage: 51300

1 = 127
2 = 138
3 = 129
4 = 129
5 = 109
6 = 111
7 = 125
8 = 122

Just purchased car, no idea on history. Today is not burning massive oil, 1qt per 3k miles. Normally does not have startup rattle.

Year: 2004 S4
Motor: OEM 4.2
Mileage: 51300

1 = 127
2 = 138
3 = 129
4 = 129
5 = 109
6 = 111
7 = 125
8 = 122

Just purchased car, no idea on history. Today is not burning massive oil, 1qt per 3k miles. Normally does not have startup rattle.

Year: 2005 S4
Motor: OEM 4.2
Mileage: 110,000

Engine warm, fuel pump fuse pulled, accelerator pedal held down, 8 cranks per test. Wet test results:

1 = 130
2 = 150
3 = 135
4 = 145
5 = 145
6 = 160
7 = 150
8 = 160

Year: 2005 S4
Motor: OEM 4.2
Mileage: 110,000

Engine warm, fuel pump fuse pulled, accelerator pedal held down, 8 cranks per test. Wet test results:

1 = 130
2 = 150
3 = 135
4 = 145
5 = 145
6 = 160
7 = 150
8 = 160

Year: 2007 B7 RS4
Engine: OEM BNS 4.2 FSI, JHM tune for Milltek exhaust
Mileage: 98,348

Results, fuel pump fuse pulled, cold engine:
Cylinder 1 - 145 psi compression, 0 percent, e.g. 100 psi @ 100 psi
Cylinder 2 - 143 psi compression, 1 percent, e.g. 99 psi @ 100 psi
Cylinder 3 - 140 psi compression, 4 percent, e.g. 96 psi @ 100 psi
Cylinder 4 - 152 psi compression, 0 percent, e.g. 100 psi @ 100 psi
Cylinder 5 - 145 psi compression, 6 percent, e.g. 94 psi @ 100 psi
Cylinder 6 - 140 psi compression, 4 percent, e.g. 96 psi @ 100 psi
Cylinder 7 - 145 psi compression, 1 percent, e.g. 99 psi @ 100 psi
Cylinder 8 - 153 psi compression, 0 percent, e.g. 100 psi @ 100 psi

Borescope looked good in each cylinder.

Seems like a fairly healthy engine.

Year: 2007 B7 RS4
Engine: OEM BNS 4.2 FSI, JHM tune for Milltek exhaust
Mileage: 98,348

Results, fuel pump fuse pulled, cold engine:
Cylinder 1 - 145 psi compression, 0 percent, e.g. 100 psi @ 100 psi
Cylinder 2 - 143 psi compression, 1 percent, e.g. 99 psi @ 100 psi
Cylinder 3 - 140 psi compression, 4 percent, e.g. 96 psi @ 100 psi
Cylinder 4 - 152 psi compression, 0 percent, e.g. 100 psi @ 100 psi
Cylinder 5 - 145 psi compression, 6 percent, e.g. 94 psi @ 100 psi
Cylinder 6 - 140 psi compression, 4 percent, e.g. 96 psi @ 100 psi
Cylinder 7 - 145 psi compression, 1 percent, e.g. 99 psi @ 100 psi
Cylinder 8 - 153 psi compression, 0 percent, e.g. 100 psi @ 100 psi

Borescope looked good in each cylinder.

Seems like a fairly healthy engine.

Any reason you did with engine cold? Typically you see these done with the engine warmed up. Just curious. Consistent results across the board though.