How to Prepare a Piston Ring Set for Side Clearance Check, End Gap Measurement, and Engine Assembly on a Subaru Outback?

When preparing the pistons and new ring sets, make sure they are matched in order to allow checking of their side clearance, end gap measurement and engine assembly. Before putting the rings on it, ensure that the piston ring side clearance is right by inserting some new rings into each groove and employing a feeler gauge to test the spaces between them at various points around every groove. Distinct clearances exist for different rings; compression rings ordinarily have a clearance of about 0.0015 to 0.004 inches. Then, confirm that the ring end gaps fall within specifications by slightly dragging feeler gauges through the ring ends. The standard ring gap (compression ring) is 0.010" - 0.020". Smaller gaps can be adjusted by careful filing of ring ends. Avoid extremely large gaps over 0.040". Subsequently, mount the rings correctly on each piston starting with oil control ring as it has three parts namely spacer/expander, upper side rail and lower side rail which must be carefully inserted into their respective grooves without using a piston ring installation tool.Then make sure that both upper and lower rails can rotate smoothly.Putting number two(middle)ring in place there should be an identification mark pointing up while number one(top)ring should also face upwards with its mark repeating these steps for remaining pistons ensuring accurate installation for each.

Genuine Subaru Outback Piston Ring Set

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51 Piston Ring Sets found

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Subaru Outback Piston Ring Set
Part Number: 12033AB340
$161.57 MSRP: $236.22
You Save: $74.65 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Manufacturer Note: STD
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2012 Subaru Outback | 2.5GT Limited, 2.5GT Premium, 2.5i, 2.5i Base, 2.5i Limited, 2.5i Premium, Baja-B, Base, GT, GT Limited, XT Limited | 2.5L H4, 2.5L H4 SOHC, 2.5L H4 Turbo
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Subaru Outback Piston Ring Set
Part Number: 12033AC180
$201.61 MSRP: $294.75
You Save: $93.14 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Manufacturer Note: STD
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2010-2019 Subaru Outback | 3.6R, 3.6R Limited, 3.6R Premium, 3.6R Touring | 3.6L H6
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Subaru Outback Piston Ring Set Std
Part Number: 12033AA210
$160.87 MSRP: $235.18
You Save: $74.31 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Piston Ring Set; Piston Rings, Ring Set
- Manufacturer Note: STD
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1996-1998 Subaru Outback | Brighton, L, LS, Out Back, Post | 2.2L H4 , 2.2L H4 (New EVAPO)
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Subaru Outback Piston Ring Set
Part Number: 12033AB360
$161.57 MSRP: $236.22
You Save: $74.65 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: OS 0.50
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2012 Subaru Outback | 2.5GT Limited, 2.5GT Premium, 2.5i, 2.5i Base, 2.5i Limited, 2.5i Premium, Baja-B, Base, GT, GT Limited, XT Limited | 2.5L H4, 2.5L H4 SOHC, 2.5L H4 Turbo
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Subaru Outback Piston Ring Set
Part Number: 12033AC250
$141.26 MSRP: $206.52
You Save: $65.26 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Manufacturer Note: OS 0.25
- Replaced by: 12033AC940
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2013 Subaru Outback | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Touring | 2.5L H4 DOHC
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Subaru Outback Piston Ring Set
Part Number: 12033AC240
$146.54 MSRP: $214.23
You Save: $67.69 (32%)
Ships in 1-2 Business Days
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Product Specifications
- Manufacturer Note: STD
- Replaced by: 12033AC930
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2013 Subaru Outback | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Touring | 2.5L H4 DOHC
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Subaru Outback Piston Ring Set
Part Number: 12033AC90A
$43.42 MSRP: $62.93
You Save: $19.51 (31%)
Ships in 1-2 Business Days
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Product Specifications
- Manufacturer Note: STD
- Replaces: 12033AC810
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2015-2019 Subaru Outback | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4
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Subaru Outback Piston Ring Set Std
Part Number: 12033AA760
$178.10 MSRP: $260.38
You Save: $82.28 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Piston Ring Set
- Manufacturer Note: STD
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1996-1999 Subaru Outback | GT, LS-I, Out Back, SUS | 2.5L H4
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Subaru Outback Piston Ring Set
Part Number: 12033AC92A
$83.50 MSRP: $121.02
You Save: $37.52 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Manufacturer Note: OS 0.50
- Replaces: 12033AC830
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2015-2019 Subaru Outback | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4
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Subaru Outback Piston Ring Set
Part Number: 12033AC91A
$83.50 MSRP: $121.02
You Save: $37.52 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: OS 0.25
- Replaces: 12033AC820
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2015-2019 Subaru Outback | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4
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Subaru Outback Piston Ring Set
Part Number: 12033AC200
$201.61 MSRP: $294.75
You Save: $93.14 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: OS0.50
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2010-2019 Subaru Outback | 3.6R, 3.6R Limited, 3.6R Premium, 3.6R Touring | 3.6L H6
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Subaru Outback Piston Ring Set
Part Number: 12033AC190
$201.61 MSRP: $294.75
You Save: $93.14 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: OS0.25
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2010-2019 Subaru Outback | 3.6R, 3.6R Limited, 3.6R Premium, 3.6R Touring | 3.6L H6
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Subaru Outback Piston Ring Set
Part Number: 12033AD72A
$67.64 MSRP: $98.03
You Save: $30.39 (31%)
ADD TO CART
Product Specifications
- Other Name: RING SET-PISTON
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2023-2025 Subaru Outback | 4 Cyl 2.4L
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Subaru Outback Piston Ring Set
Part Number: 12033AD47A
$66.61 MSRP: $96.53
You Save: $29.92 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Ring Set-Piston
- Manufacturer Note: STD
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Outback | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4 DI
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Subaru Outback Piston Ring Set
Part Number: 12033AD49A
$82.06 MSRP: $118.93
You Save: $36.87 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Ring Set-Piston
- Manufacturer Note: OS 0.50
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Outback | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4 DI
View related parts
Subaru Outback Piston Ring Set
Part Number: 12033AD48A
$82.06 MSRP: $118.93
You Save: $36.87 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Ring Set-Piston
- Manufacturer Note: OS 0.25
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Outback | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4 DI
View related parts
Subaru Outback Piston Ring Set
Part Number: 12033AD74A
$134.77 MSRP: $195.32
You Save: $60.55 (31%)
ADD TO CART
Product Specifications
- Other Name: RING SET-PISTON
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2023-2025 Subaru Outback | 4 Cyl 2.4L
View related parts
Subaru Outback Piston Ring Set
Part Number: 12033AD73A
$134.77 MSRP: $195.32
You Save: $60.55 (31%)
ADD TO CART
Product Specifications
- Other Name: RING SET-PISTON
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2023-2025 Subaru Outback | 4 Cyl 2.4L
View related parts
Subaru Outback PB000811 Ring Set
Part Number: 12033AB010
$183.81 MSRP: $268.73
You Save: $84.92 (32%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Piston Ring Set
- Manufacturer Note: STD
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2000-2001 Subaru Outback | Base, Brighton, Cold Weather, GT, L, Limited, SUS Limited | 2.5L H4
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Subaru Outback Piston Ring Set
Part Number: 12033AB270
$197.30 MSRP: $288.45
You Save: $91.15 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: OS,0.50
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2002-2004 Subaru Outback | Baja, Baja-S, Base, Brighton, Cold Weather, GT, L, Limited, L-S, SUS Limited | 2.5L H4

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1-20 of 51 Results

Subaru Outback Piston Ring Set

The Subaru Outback Piston Ring Set ensures that cylinder compression is maintained, allowing for high combustion power and minimal oil burning. The Piston Ring Set fits around the piston. It also seals the combustion chamber, transfers heat to the cylinder walls, and scrapes excess oil back to the sump. Thus, the crankshaft receives clean, strong motion. The Piston Ring Set in older Outback engines featured thicker cast iron bands. Later designs moved to ductile iron or steel with plasma moly or chromium faces. Performance versions adopted narrower 1 millimeter tops and 2 millimeter oil rings that reduced friction and clung more closely to the bore. The Piston Ring Set must always stay well lubricated due to its continuous sliding, which constitutes roughly 25 percent of mechanical drag. However, modern surface treatments prevent it from binding. The updated Subaru block continues to build a three ring stack per cylinder, two compression plus one oil control ring. The recent Piston Ring Set is a refined design that allows the recent Subaru Outback to accelerate smoother, save fuel, and resist blow-by better than previous equivalents.

Our website stands as the go-to online destination for OEM Subaru Outback Piston Ring Set. With complete lines of genuine Subaru Outback Piston Ring Set available at unbeatable market prices, we ensure top quality, reliability, and durability. Each part comes backed by the manufacturer's warranty, reinforcing your trust in our offerings.

Subaru Outback Piston Ring Set Parts Questions & Experts Answers

Piston Ring Set
12033AB340
Q: How to Prepare a Piston Ring Set for Side Clearance Check, End Gap Measurement, and Engine Assembly on a Subaru Outback?
A:
When preparing the Pistons and new ring sets, make sure they are matched in order to allow checking of their side clearance, end gap measurement and engine assembly. Before putting the rings on it, ensure that the piston ring side clearance is right by inserting some new rings into each groove and employing a feeler gauge to test the spaces between them at various points around every groove. Distinct clearances exist for different rings; compression rings ordinarily have a clearance of about 0.0015 to 0.004 inches. Then, confirm that the ring end gaps fall within specifications by slightly dragging feeler gauges through the ring ends. The standard ring gap (compression ring) is 0.010" - 0.020". Smaller gaps can be adjusted by careful filing of ring ends. Avoid extremely large gaps over 0.040". Subsequently, mount the rings correctly on each piston starting with oil control ring as it has three parts namely spacer/expander, upper side rail and lower side rail which must be carefully inserted into their respective grooves without using a piston ring installation tool.Then make sure that both upper and lower rails can rotate smoothly.Putting number two(middle)ring in place there should be an identification mark pointing up while number one(top)ring should also face upwards with its mark repeating these steps for remaining pistons ensuring accurate installation for each.