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Head Cover

Part Number: 12310-Z8A-000
HondaBriggs and StrattonToro
Availability: 13 in stock
Price: $14.49
Ships within 1 business day

*This part replaces obsolete part #: 12311-ZL8-D00 (Serial# (1000001-9999999)), 12310-Z0J-000 (Serial# (1212617-9999999)), 12311-ZL8-000 (Serial# (1000001-1468766)), 12310-Z8B-000, 12310-Z0J-000, 12311-ZL8-000 and 12311-ZL8-D00.

Product Information
Manufacturer: Honda, Briggs and Stratton, Toro
Product Number: 12310-Z8A-000
Classification: Part
Weight: 0.27 lbs.
Shipping: Ships Worldwide
Description:
This genuine item is supplied directly from the original equipment manufacturer for use with Honda engines commonly installed on a variety of lawn and garden equipment. It is the main cover for the cylinder assembly. The part helps to protect the internal components from dust and other contaminants. If your cover is damaged or is missing, this will provide an identical replacement for the original component that was installed on a new unit. This high-quality head cover is made of durable metal and is sold individually. Note, the hardware to secure it is sold separately. You will need a wrench to perform this repair.
Compatibility

This part is compatible with the following machines:

Honda
GC135 (Type VXP5)(VIN# GCAJ-1000001-9999999) Small Engine
GC135 (Type WKT2)(VIN# GCAJ-1000001-9999999) Small Engine
GC135 (Type WME2)(VIN# GCAJ-1000001-9999999) Small Engine
GC160 (Type PHA)(VIN# GCAH-1000001-9999999) Small Engine
GC160 (Type PXA)(VIN# GCAH-1000001-9999999) Small Engine
GC160 (Type QBC)(VIN# GCAH-1000001-9999999) Small Engine
GC160 (Type QHA)(VIN# GCAH-1000001-9999999) Small Engine
GC160 (Type QHA1)(VIN# GCAH-1000001-9999999) Small Engine
GC160 (Type QHA2)(VIN# GCAH-1000001-9999999) Small Engine
GC160 (Type QHAJ)(VIN# GCAH-1000001-9999999) Small Engine
GC160 (Type WKT2)(VIN# GCAH-1000001-9999999) Small Engine
GC160 (Type WME2)(VIN# GCAH-1000001-9999999) Small Engine
GC160A (Type DEAF)(VIN# GCAHA-8000001) Small Engine
GC160A (Type DHAF)(VIN# GCAHA-1000001-3599749) Small Engine
GC160A (Type MEA2)(VIN# GCAHA-8000001-9999999) Small Engine
GC160A (Type MHA2)(VIN# GCAHA-1000001-3599749) Small Engine
GC160A (Type PHA)(VIN# GCAHA-1000001-3599749) Small Engine
GC160A (Type QBC)(VIN# GCAHA-1000001-3599749) Small Engine
GC160A (Type QDE)(VIN# GCAHA-1000001-3599749) Small Engine
GC160A (Type QHA)(VIN# GCAHA-1000001-3599749) Small Engine
GC160A (Type QHA1)(VIN# GCAHA-1000001-3599749) Small Engine
GC160A (Type QHA2)(VIN# GCAHA-1000001-3599749) Small Engine
GC160A (Type QHAF)(VIN# GCAHA-1000001-3599749) Small Engine
GC160A (Type QHAJ)(VIN# GCAHA-1000001-3599749) Small Engine
GC160A (Type VHA)(VIN# GCAHA-1000001-3599749) Small Engine
GC160A (Type VXA)(VIN# GCAHA-1000001-3599749) Small Engine
GC160LA (Type DHAF)(VIN# GCAHA-3599750-8000000) Small Engine
GC160LA (Type MHA2)(VIN# GCAHA-3599750-8000000) Small Engine
GC160LA (Type MHAB)(VIN# GCAHA-3599750-8000000) Small Engine
GC160LA (Type QHA1)(VIN# GCAHA-3599750-8000000) Small Engine
GC160LA (Type QHA2)(VIN# GCAHA-3599750-8000000) Small Engine
GC160LA (Type QHAF)(VIN# GCAHA-3599750-8000000) Small Engine
GC160LA (Type QHAJ)(VIN# GCAHA-3599750-8000000) Small Engine
GC160LA (Type QHC)(VIN# GCAHA-3599750-8000000) Small Engine
GC160LA (Type VHA)(VIN# GCAHA-3599750-8000000) Small Engine
GC160LA (Type VXA)(VIN# GCAHA-3599750-8000000) Small Engine
GC160LE (Type VXA)(VIN# GCABE-1000001) Small Engine
GC190A (Type DHAF)(VIN# GCAAA-1000001) Small Engine
GC190A (Type MEA2)(VIN# GCAAA-8000001-9999999) Small Engine
GC190A (Type QEAF)(VIN# GCAAA-8000001-9999999) Small Engine
GC190A (Type QHA)(VIN# GCAAA-1000001-7999999) Small Engine
GC190A (Type QHA1)(VIN# GCAAA-1000001-7999999) Small Engine
GC190A (Type QHA2)(VIN# GCAAA-1000001-7999999) Small Engine
GC190A (Type QHAD)(VIN# GCAAA-1000001) Small Engine
GC190A (Type QHAF)(VIN# GCAAA-1000001-1496156) Small Engine
GC190A (Type VBA)(VIN# GCAAA-1000001-7999999) Small Engine
GC190A (Type VXA)(VIN# GCAAA-1000001) Small Engine
GC190LA (Type MHA2)(VIN# GCAAA-1496157-8000000) Small Engine
GCV135 (Type A1A)(VIN# GJAF-1000001-9999999) Small Engine
GC190LA (Type QHAF)(VIN# GCAAA-1496157-8000000) Small Engine
GCV135 (Type A1D)(VIN# GJAF-1000001-1011083) Small Engine
GCV135 (Type A2A)(VIN# GJAF-1000001-9999999) Small Engine
GCV135 (Type A2D)(VIN# GJAF-1000001-1000165) Small Engine
GCV135 (Type A2R)(VIN# GJAF-1000001-9999999) Small Engine
GCV135 (Type N7E2)(VIN# GJAF-1000001-9999999) Small Engine
GCV135A (Type N1A)(VIN# GJAFA-1000001-9999999) Small Engine
GCV135A (Type N5A)(VIN# GJAFA-1000001-9999999) Small Engine
GCV160 (Type A1A)(VIN# GJAE-1000001-9999999) Small Engine
GCV160 (Type A2A)(VIN# GJAE-1000001-9999999) Small Engine
GCV160 (Type A2R)(VIN# GJAE-1000001-9999999) Small Engine
GC135 (Type PHA)(VIN# GCAJ-1000001-9999999) Small Engine
GC135 (Type PXA)(VIN# GCAJ-1000001-9999999) Small Engine
GC135 (Type QHA)(VIN# GCAJ-1000001-9999999) Small Engine
GC135 (Type QHA1)(VIN# GCAJ-1000001-9999999) Small Engine
GC135 (Type QHA2)(VIN# GCAJ-1000001-9999999) Small Engine
GC135 (Type VHA)(VIN# GCAJ-1000001-9999999) Small Engine
GC135 (Type VXA)(VIN# GCAJ-1000001-9999999) Small Engine
GCV160 (Type N7A1)(VIN# GJAE-1000001-9999999) Small Engine
GCV160A (Type A1A)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type A1AE)(VIN# GJAEA-1000001) Small Engine
GCV160A (Type A1AF)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type A1AS)(VIN# GJAEA-1000001) Small Engine
GCV160A (Type A2A)(VIN# GJAEA-1000001-6699999) Small Engine
GCV160A (Type A2R)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type A3A)(VIN# GJAEA-1000001-6699999) Small Engine
GCV160A (Type BHH)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type E1A2)(VIN# GJAEA-8000001-8018819) Small Engine
GCV160A (Type R3A1)(VIN# GJAEA-8000001-8018819) Small Engine
GCV160A (Type RTL1)(VIN# GJAEA-1000001) Small Engine
GCV160A (Type S1A)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type S1A1)(VIN# GJAEA-1000001-6699999) Small Engine
GCV160A (Type S1M)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type S3A)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type S3A2)(VIN# GJAEA-1000001) Small Engine
GCV160A (Type S3H)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type STA1)(VIN# GJAEA-1000001-6699999) Small Engine
GCV160A (Type STL1)(VIN# GJAEA-1000001) Small Engine
GCV160A (Type E5A4)(VIN# GJAEA-8000001-8018819) Small Engine
GCV160A (Type EHHB)(VIN# GJAEA-8000001-8018819) Small Engine
GCV160A (Type N1A)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type N1AF)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type N5A)(VIN# GJAEA-1000001) Small Engine
GCV160A (Type N5AF)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type N5MF)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type N5R)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type N7A1)(VIN# GJAEA-1000001-5386302) Small Engine
GCV160A (Type NBL1)(VIN# GJAEA-1000001) Small Engine
GCV160LA (Type A1AF)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type A2R)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type BHH)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type E1A2)(VIN# GJAEA-8018820) Small Engine
GCV160LA (Type N1A)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type N1AF)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type N5AF)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type N5MF)(VIN# GJAEA-5386303) Small Engine
GC160 (Type VHA)(VIN# GCAH-1000001-9999999) Small Engine
GC160 (Type VXA)(VIN# GCAH-1000001-9999999) Small Engine
GC160A (Type QEA)(VIN# GCAHA-8000001) Small Engine
GC160A (Type QEA2)(VIN# GCAHA-8000001-9999999) Small Engine
GC160A (Type QEAF)(VIN# GCAHA-8000001-9999999) Small Engine
GC160LA (Type QBC)(VIN# GCAHA-3599750-8000000) Small Engine
GC160LA (Type QDE)(VIN# GCAHA-3599750-8000000) Small Engine
GC160LA (Type QHA)(VIN# GCAHA-3599750-8000000) Small Engine
GC190A (Type MHA2)(VIN# GCAAA-1000001-1496156) Small Engine
GC190A (Type QEA)(VIN# GCAAA-8000001-9999999) Small Engine
GC190A (Type QEA2)(VIN# GCAAA-8000001-9999999) Small Engine
GCV160 (Type N1)(VIN# GJAE-1000001-9999999) Small Engine
GCV160 (Type N2)(VIN# GJAE-1000001-9999999) Small Engine
GCV160A (Type E1A4)(VIN# GJAEA-8000001-8018819) Small Engine
GCV160A (Type E1G7)(VIN# GJAEA-8000001-8018819) Small Engine
GCV160A (Type R1A)(VIN# GJAEA-8000001-8018819) Small Engine
GCV160A (Type R3A)(VIN# GJAEA-8000001-8018819) Small Engine
GCV160LA (Type A1A)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type N5R)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type N7A1)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type N7S1)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type R3A)(VIN# GJAEA-8018820) Small Engine
GCV160LA (Type S1A)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type S1M)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type S3A)(VIN# GJAEA-5386303) Small Engine
GCV160LA (Type S3H)(VIN# GJAEA-5386303) Small Engine
GCV160LA0 (Type A2R)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type A1A)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type BHH)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type A1AF)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type E1A2)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type N1A)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type N1AF)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type N5AF)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type N5MF)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type N5R)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type N7A1)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type N7S1)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type R3A)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type S1A)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type S1M)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type S3A)(VIN# GJARA-1000001) Small Engine
GCV160LA0 (Type S3H)(VIN# GJARA-1000001) Small Engine
GCV160LE (Type A7H1)(VIN# GJAAE-1000001) Small Engine
GCV160LA0 (Type S3T)(VIN# GJARA-1000001) Small Engine
Expand the 150+ compatible machines
Products Compatibility

This item works with the following types of products:

  • • Engine
Questions & Answers

No questions have been asked yet
Repair Instructions: Submitted by Customers Like You
3 of 3 people found this instruction helpful
Tool Type:
Lawn Mower
Parts Used:
Head Cover - 12310-Z8A-000
RING SET, PISTON - 13010-ZL8-003
Valve, In. - 14711-ZL8-000
Valve, Ex. (C8E) - 14721-ZL8-000
Repair Difficulty:
Medium
Time Spent Repairing:
1-2 hours
Tools Used:
Screwdriver, Wrench Set, Nutdriver, Electrical screwdriver
Rings wore out
1. Prep engine for work. (drain oil, remove trim, remove from mow deck, etc)
2. Remove valve cover
3. Open crankcase
4. Remove flywheel with puller (try to mark locations on timing belt)
5. Remove crankshaft and piston (lose markings on timing belt)
6. Remove valve rockers and Springs then valves
7. Order new parts and wait for them to come
8. Install new valves and Springs and rockers (using online diagrams for exact part locations)
9. Install new rings on piston.
10. Install piston using recently purchased ring compressor
11. Install crankshaft
12. Refer to Internet for timing (quite simple)
13. Reinstall flywheel
14. Put rest if motor back together as best I can.
15. Try to figure why choke isn't working like should, no luck
16. Put in oil and gasoline and celebrate when it fires up and runs.
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3 of 4 people found this instruction helpful
Tool Type:
Engine
Parts Used:
Head Cover - 12310-Z8A-000
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Screwdriver, Pliers
Valve cover was leaking due to damage.
1. Unscrewed valve cover.
2. Used pliers to pull valve cover off which damaged.
3. Cleaned off all sealant from head portion that valve cover mounts on.
4. Put grey sealant on the new valve cover which was recommended by others. (There was no gasket.)
5. Installed new valve cover and hand tightened screws per instructions.
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1 of 1 people found this instruction helpful
Tool Type:
Lawn Mower
Parts Used:
Head Cover - 12310-Z8A-000
Repair Difficulty:
Easy
Time Spent Repairing:
30-60 minutes
Tools Used:
Socket set
My cover had a puncture hole so I needed to replace it.
1. Drained what left of the oil.
2. Removed the old cover.
3. Applied a gasket maker compound.
4. Placed my new cover on.
5. Hand tightened the bolts but not fully.
6. Allowed gasket compound to dry for a bit.
7. Came back and tightened all the way for a good seal.
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1 of 1 people found this instruction helpful
Tool Type:
Lawn Mower
Parts Used:
Air Cleaner Element - 17211-ZL8-023
Head Cover - 12310-Z8A-000
Spark Plug - 98079-56846
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Socket set, Wrench Set
Valve cover was leaking oil!
Removed valve cover. Cleaned off old gasket material. Applied new gasket rtv and installed new valve cover
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Tool Type:
Lawn Mower
Parts Used:
Head Cover - 12310-Z8A-000
Repair Difficulty:
Medium
Time Spent Repairing:
15-30 minutes
Tools Used:
Screwdriver, Socket set
I somehow punched a small hole in the aluminum valve cover. So it was releasing minute oil smoke
Took the 4 bolts out an thought I could just remove the cover. Wrong... it is sealed with liquid gasket material. So you will likely bend and make useless the one you're removing. For me it was no problem as I was replacing it anyway. Be sure to note the instructions for the gasket material. Mine said do not use for 24 hours to allow a full cure.
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Tool Type:
Lawn Mower
Parts Used:
Head Cover - 12310-Z8A-000
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Socket set, form a gasket
Valve cover was bent preventing the valves from working
removed. And replaced valve cover
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Tool Type:
Engine
Parts Used:
Head Cover - 12310-Z8A-000
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Nutdriver
Timing belt kept jumping off the pulley.
Removed the rocker arm cover.
Removed the rope starter assembly.
Move the flywheel to the magnets meet the magneto.
Move the cam sprocket so the timing marks line up.
Re-install the belt onto the cam sprocket.
Put the new rocker arm cover on. (Has a retainer to keep the belt from jumping.)
Re-install the rope starter assembly.
Log Splitter started on second pull.
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Reviews
5
Average Rating (out of 5):
7 Reviews
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  • Perfect Fit
    The part was original part at a great price. Speedy delivery
    Guest - July 5, 2022 Verified Purchase
    Easy fix
    Wasn’t sure why my lawnmower just died and wouldn’t restart. I didn’t realize that I dented the valve cover while mowing around a fire hydrant. Once I figured it out, I ordered a new one from ereplacementparts. Arrived fast and perfect condition as always. First place to check when you need a part.
    Guest - April 30, 2022 Verified Purchase
    Easy repair
    Was in great condition
    Guest - November 18, 2020 Verified Purchase
    Arrived quickly, identical to original part, quick fix.
    The parts arrived quickly and the quality was excellent. The head cover is not designed to use a pre-made gasket. This is true for the original part too.You will need to get a tube of “Permatex” and follow the directions on the tube. Be sure to use the high heat type. You put a line of permatex on the lip of the new head cover and let set per tube instructions. Works perfectly. Be sure to tighten the 4 screws evenly to insure the permatex is pressed down and seals evenly. Torque screws per instructions to insure the screws stay tight.
    Charles - August 4, 2020 Verified Purchase
    Easy part and install
    Ok original packing.
    Guest - June 22, 2020 Verified Purchase
    Original Part
    Ordered this part for my Honda engine pressure washer. Part arrived very quickly and fit perfectly. Installation was quick and easy.
    Guest - July 15, 2019 Verified Purchase
    Quality and fit
    Good quality and price delivered in timely manner.
    James - May 27, 2019 Verified Purchase
    Verified Purchase
    eReplacementParts Team
    • Highest Rating
    • Most Recent
    < PREV
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    NEXT >
    Product Information
    Manufacturer: Honda, Briggs and Stratton, Toro
    Product Number: 12310-Z8A-000
    Classification: Part
    Weight: 0.27 lbs.
    Shipping: Ships Worldwide

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