9.7x22.5x6 mm Cylinder Head Cover Bolt Seal Ring 436.010 ACM, Metal-Insert Washer Seal

Product Overview

A 9.7 x 22.5 x 6 mm seal ring sits under a cylinder head cover bolt, around the bolt shank and inside the boss in the cover. Its job is to stop oil creeping up past the bolt thread and out onto a hot cylinder head, which shows up as an oil stain around the bolt heads. This one is a black rubber ring bonded to a metal insert washer, and the insert limits how far the rubber is compressed when the bolt is tightened.

At a glance:

9.7x22.5x6 mm | ACM (acrylate rubber) with a bonded metal insert washer | black, single piece ring for a bolt boss | made in Xingtai, Hebei, China | working range -30 C to +150 C

VKEFOT produces this ring in Xingtai, Hebei, China for engine rebuilders and parts distributors. It is not a rotary shaft seal, so the fit is decided by the bolt shank diameter, the recess diameter in the cover and the depth of that recess, all of which are easy to measure on the cover in front of you.

Key Features & Benefits

• Stops oil at the bolt boss: The ring seals around the bolt shank and under the bolt head, which is where a valve cover weeps oil down onto the exhaust side of the head.
• Bonded metal insert washer: The insert controls the compression of the rubber as the bolt is torqued, so the ring seats the same way at every bolt and does not split or flatten out.
• ACM for hot engine oil: Acrylate rubber keeps its sealing force in hot oil and covers -30 C to +150 C, which suits the temperature around a cylinder head bolt boss.
• Sized for a cover recess: 9.7 mm bore, 22.5 mm outside diameter and 6 mm height match the counterbore in the cover, so the ring sits flat instead of tilting under the bolt head.
• Repeatable on a rebuild: One ring per bolt keeps the job simple, and a set of the same part number covers the full run of bolts on the cover.
• Easy to check before fitting: The bore diameter and the insert are visible on inspection, so a workshop can confirm the ring against the bolt and recess before assembly.

Dimensions & Specification

Specification	Value
Inner Diameter (ID)	9.7 mm
Outer Diameter (OD)	22.5 mm
Width / Height	6 mm
Material	ACM (acrylate rubber)
Colour	Black
Structure	Rubber seal ring bonded to a metal insert washer, single piece bolt boss seal
Seal Type	Bolt seal ring
OEM Reference	436.010; AL11983474
Marking	436.010
Continuous Service Temperature	-30 C to +150 C
Brand	VKEFOT
Origin	Xingtai, Hebei, China

Dimensions are nominal production values written as bore diameter x outside diameter x overall height. The recess in the cylinder head cover and the bolt shank diameter decide the fit, so measure the cover as well as the old ring before ordering.

Material & Construction

This ring is moulded from ACM (acrylate rubber), an oil resistant rubber chosen for hot engine oil service, and it is bonded to a steel insert washer. ACM holds its sealing force from -30 C to +150 C and resists the aged, additised oil found around a cylinder head, where a general purpose nitrile would harden faster. The insert washer limits compression so the rubber is not crushed when the cover bolts are torqued down. Where the duty is cooler and the oil is mineral, the same ring can also be quoted in NBR, but ACM is the material used for this position.

Quality Control and Inspection

• Incoming: compound hardness checked before release to production.
• In process: bond strength between rubber and insert, bore concentricity, section height and rubber hardness checked at set intervals.
• Final: dimensional check on bore diameter, outside diameter and overall height, hardness, visual check of the rubber surface, insert seating and marking, then packing count verification.
• Traceability: inspection results for each batch are recorded and kept; the inspection scope can be agreed before order confirmation.

Inspection records are kept per production batch and can be traced to the delivered shipment. Third-party inspection before shipment can be arranged on request.

Customization and OEM Service

packaging and logo available upon request

Packaging, Carton and Delivery

Standard packing is individual polybag, inner carton, then export carton. Carton marks, labels and barcodes are printed to buyer specification.

Lead time for standard sizes is typically 7 to 15 working days after order confirmation, and longer for sizes that are not held as standard stock. Minimum order quantity depends on whether the size is a stocked standard or made to order. Pricing, MOQ, freight and trade terms are confirmed in the written quotation. Send an RFQ with quantity and destination port.

How to Order

The more of this you include, the faster and more accurate the quotation:

1. Size or OE number: 9.7 x 22.5 x 6 mm, or the number stamped on your current seal ring.
2. Quantity and destination: required quantity, destination country and port.
3. Material requirement: ACM as supplied for this position, or advise the oil temperature if another compound is needed.
4. Packaging requirement: carton marks, label data and barcode requirement.
5. Sample photo or drawing: where the ring is matched from a removed original.
6. Operating conditions: engine family, oil temperature and bolt size, if known.

Frequently Asked Questions

How do I confirm this seal fits my assembly?
Measure the bolt shank diameter, the recess diameter in the cover and the recess depth, then compare them with the ring you removed. Those three values, plus the section height, decide whether it will seat.

What are the exact dimensions of this oil seal?
9.7 mm bore diameter, 22.5 mm outside diameter and 6 mm overall height. Check these against your own sample or the cover recess, because boss depths differ between engine families.

What is the minimum order quantity?
MOQ depends on whether the ring is a stocked standard or produced to order. State the quantity you need and the MOQ and price steps are confirmed in the quotation.

What is the lead time, and can you ship by sea or air?
Orders are normally produced and packed within 7 to 15 working days after confirmation. Sea and air freight are both arranged, with cost and transit time quoted for the destination.

Can you supply FKM or HNBR instead of NBR?
This ring is supplied in ACM, which suits hot engine oil at this position. FKM or HNBR can be discussed for the same geometry if your operating conditions call for them; state the duty with the enquiry.

Do you provide samples, and are they free?
Samples for evaluation can be arranged. Sample and freight charges are quoted per request, and on a confirmed bulk order the sample cost is normally set off against the order value.

Can you produce our packaging and logo?
packaging and logo available upon request.

What information do you need to quote?
The OE number or a photo of the old ring, the engine family, quantity, oil temperature, packaging requirement, destination port and preferred Incoterm.

Request a Quotation

Send the OE number or a photo of the ring you are replacing, the quantity, the destination and any branding requirement, and we will reply with MOQ, lead time, packing details and price.

VKEFOT Seals: oil seals, O-rings and custom rubber parts. Xingtai, Hebei, China.