How to replace broken Rocker Shaft Spring Kit and Valve Stem Oil Seal without removing the cylinder heads on 4.3L V6 engine on GMC Jimmy?

To replace broken valve springs or defective Valve Stem Oil Seals without removing the cylinder heads, keep these steps in mind, First, take off the valve cover(s), and both should be removed if all Valve Stem Oil Seals are to be replaced. For all seals replacement, remove the spark plug from the cylinder having problem or remove all of them. Turn the crankshaft until the affected piston is brought to top dead center on compression stroke. Start by cylinder number 1 in case of replacing all seals and follow through with cylinders following the firing order. An adapter is threaded into the spark plug hole and an air hose connected to a compressed air source, holding closed valves. Insert shop rags into cylinder head holes to keep debris from dropping into the engine. With a valve spring compressor, compress spring/damper assembly and remove keepers. Lift out spring retainer/oil shield/valve spring assembly along with intake valve's O-ring seal on valve stem and umbrella type guide seal. Wrap a rubber band or tape around the valve stem to avoid it falling into combustion chamber and release pressure of air. Check that there are no damages on valve stem and make sure it moves freely in guide. Lubricate valve stem and fit new intake valve umbrella-type guide seal for intake valves insertion point where it's stuck at top position around a piece of dowel pin that fits inside of it via available range at bottom of spring retainer channel. Install d/spring/damper assembly & shield compressing it enough for you then install n/O-ring seal over v/stem; Position either v/spring retainer or rotator; place "keepers" using dab of grease for retention till pressure is taken off s/tool; Disconnect air hose; put rocker arm(s) & pushrod(s) then that may be followed by reinstallation of valv/e covers; Reinstall spark plug(s) & wires, start engine and run engine also check for any oil leakage or any unusual sounds around the valve cover area. Be advised that these procedures require specialized tooling and should be performed with caution.

Genuine GMC Jimmy Valve Stem Oil Seal

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11 Valve Stem Oil Seals found

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GMC Jimmy Seal, Exhaust Valve Stem Oil
Part Number: 12564852
$12.60 MSRP: $15.33
You Save: $2.73 (18%)
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Product Specifications
- Other Name: SEAL, Engine Valve; Valve Seal
- Replaces: 12558674
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2001 GMC Jimmy | 2 DOOR, 4 DOOR | 6 Cyl 4.3L
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GMC Jimmy Seal,Valve Stem Oil
Part Number: 10212810
$4.99 MSRP: $7.97
You Save: $2.98 (38%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: SEAL, Engine Valve; Valve Seal, Valve Seal Kit
- Replaces: 00460483, 460483
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-2001 GMC Jimmy | 2 DOOR, 4 DOOR | 6 Cyl 4.3L
- 1985-1989 GMC Jimmy | 1/2 TON | 6 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L
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GMC Jimmy Seal, Exhaust Valve Stem Oil
Part Number: 23502552
$13.05
ADD TO CART
Product Specifications
- Other Name: SEAL, Engine Valve; Valve Seal
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1991 GMC Jimmy | 1/2 TON | 8 Cyl 6.2L Diesel
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GMC Jimmy Seal,Valve Stem Oil
Part Number: 10114119
$12.60 MSRP: $15.01
You Save: $2.41 (17%)
ADD TO CART
Product Specifications
- Other Name: SEAL, Engine Valve; Valve Seal
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1990-1991 GMC Jimmy | 1/2 TON
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GMC Jimmy Seal,Valve Stem Oil
Part Number: 10214034
$1.71 MSRP: $2.72
You Save: $1.01 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: SEAL, Engine Valve; Seal Ring, Valve Seal, Valve Seal O-Ring
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1995 GMC Jimmy | 1/2 TON, 2 DOOR, 4 DOOR | 6 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel
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GMC Jimmy Seal Kit,Valve Stem Oil
Part Number: 12511890
Product Specifications
- Other Name: SEAL KIT, Engine Valve; Valve Seal, Valve Seal Kit
- Replaces: 14033546, 10132715
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-1995 GMC Jimmy | 2 DOOR, 4 DOOR | 6 Cyl 4.3L
- 1985-1988 GMC Jimmy | 1/2 TON | 6 Cyl 4.3L
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GMC Jimmy Seal, Exhaust Valve Stem Oil
Part Number: 10147883
Product Specifications
- Other Name: SEAL, Engine Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1986 GMC Jimmy | 1/2 TON
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GMC Jimmy Seal, Exhaust Valve Stem Oil
Part Number: 10147882
Product Specifications
- Other Name: SEAL, Engine Valve; Valve Seal
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1988 GMC Jimmy | 1/2 TON | 6 Cyl 4.3L
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GMC Jimmy Seal, Inlet Valve Stem Oil (Free Of Asbestos)
Part Number: 460527
Product Specifications
- Other Name: SEAL, Engine Valve; Valve Seal
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1991 GMC Jimmy | 1/2 TON
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GMC Jimmy Seal Assembly, Inlet Valve Stem Oil .030" Oversize (Free Of Asbestos)
Part Number: 14037716
Product Specifications
- Other Name: SEAL, Engine Valve; Valve Seal
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-1995 GMC Jimmy | 2 DOOR, 4 DOOR | 6 Cyl 4.3L
- 1985-1989 GMC Jimmy | 1/2 TON | 6 Cyl 4.3L
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GMC Jimmy Seal Assembly, Intake Valve Stem Oil .015" Oversize (Free Of Asbestos)
Part Number: 14037715
Product Specifications
- Other Name: SEAL, Engine Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-1995 GMC Jimmy | 2 DOOR, 4 DOOR | 6 Cyl 4.3L
- 1985-1986 GMC Jimmy | 1/2 TON | 8 Cyl 5.0L, 8 Cyl 5.7L

GMC Jimmy Valve Stem Oil Seal

The GMC Jimmy Valve Stem Oil Seal prevents engine oil from oozing past the valve guides and into the combustion chambers, maintaining power and limiting smoke. Sitting snugly around each valve stem, the Valve Stem Oil Seal meters just enough lubricant to prevent metal-to-metal wear but blocks excess fluid that will dilute the air and fuel mix. It supports the constant opening and closing commanded by cam lobes, lifters, pushrods, and rocker arms on traditional OHV layouts as well as the direct cam on bucket action of OHC heads, so whatever type of valvetrain the GMC sport utility carries, the same basic Valve Stem Oil Seal duty is unchanged. Over long miles and rising temperatures, worn seals can mimic weak valve springs by allowing the oil to foul the chambers and cause misfires and lost compression, which is why a fresh Valve Stem Oil Seal will often restore crisp throttle response in a high-mileage Jimmy engine. Factory data does not show separate generations, but each Valve Stem Oil Seal was sized to fit the cylinder heads applied in successive GMC and Jimmy model years, ensuring proper seating pressure and clean exhaust.

Each OEM GMC Jimmy Valve Stem Oil Seal we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

GMC Jimmy Valve Stem Oil Seal Parts Questions & Experts Answers

Seal,Valve Stem Oil
10212810
Q: How to replace broken Rocker Shaft Spring Kit and Valve Stem Oil Seal without removing the cylinder heads on 4.3L V6 engine on GMC Jimmy?
A:
To replace broken valve springs or defective Valve Stem Oil Seals without removing the cylinder heads, keep these steps in mind, First, take off the valve cover(s), and both should be removed if all Valve Stem Oil Seals are to be replaced. For all seals replacement, remove the spark plug from the cylinder having problem or remove all of them. Turn the crankshaft until the affected piston is brought to top dead center on compression stroke. Start by cylinder number 1 in case of replacing all seals and follow through with cylinders following the firing order. An adapter is threaded into the spark plug hole and an air hose connected to a compressed air source, holding closed valves. Insert shop rags into cylinder head holes to keep debris from dropping into the engine. With a valve spring compressor, compress spring/damper assembly and remove keepers. Lift out spring retainer/oil shield/valve spring assembly along with intake valve's O-ring seal on valve stem and umbrella type guide seal. Wrap a rubber band or tape around the valve stem to avoid it falling into combustion chamber and release pressure of air. Check that there are no damages on valve stem and make sure it moves freely in guide. Lubricate valve stem and fit new intake valve umbrella-type guide seal for intake valves insertion point where it's stuck at top position around a piece of dowel pin that fits inside of it via available range at bottom of spring retainer channel. Install d/spring/damper assembly & shield compressing it enough for you then install n/O-ring seal over v/stem; Position either v/spring retainer or rotator; place "keepers" using dab of grease for retention till pressure is taken off s/tool; Disconnect air hose; put Rocker Arm(s) & Pushrod(s) then that may be followed by reinstallation of valv/e covers; Reinstall spark plug(s) & wires, start engine and run engine also check for any oil leakage or any unusual sounds around the valve cover area. Be advised that these procedures require specialized tooling and should be performed with caution.

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