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Spark Plug Hole Protective Cap
MFR Model# VC937-16 BLK
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Overview
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Note: These are not for 18mm plugs. #9721 Spark Plug Hole Caps. Seal your Spark plug hole openings with these inexpensive tapered fit plastic caps. Prevent debris from accidentally entering ports and creating damage or mischief. Ideal for sealing for winter storage, preventing moisture from corroding internal engine parts. Also can be used to seal ports for leak testing, an important procedure that locates potential air leaks before they cause costly engine damage. Tapered fit provides positive seal for either vacuum or pressure testing, Tapers from 0.482" to 0.526". |
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WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. |
Reviews
Verified Purchase
Spark Plug Hole Protective Cap
Purchased the spark plug hole cap for use on a Ford small block 351W engine. Plug hole is 14mm and the caps fit perfectly.
Verified Purchase
Spark Plug Hole Protective Cap
Product exactly what I was looking for. Great service, product and pricing,
Verified Purchase
Spark Plug Hole Protective Cap
These fit my small block Chevy (after-market heads) spark plug holes perfectly, in preparation for painting of the newly finished engine. My order was filled immediately, and the parts arrived MUCH sooner than I expected. THANK YOU.
Spark Plug Hole Protective Caps are way to small they came loosely packed in a small plastic bag unsealed, twist tie around it. I ordered 30 received 28. Would appreciate a refund. Thank you. Order # VC937-16-BLK
Verified Purchase
Spark Plug Hole Protective Cap
Guys, change the description! I wish I would have read the reviews first, no they dont even come close to fitting an 18mm spark plug hole, which is why I wanted them for shipping engines. No I need to scramble to find some that do fit!
These plug hole caps do not fit aircraft engine spark plug holes (18mm)
If you order these, you will receive T-5 Cap Plugs (Stock No. 04-00048), these will probably work on the spark plug holes in a Ford 289, but not on an O-320! T-8 Cap Plugs are O.K. ( Stock Number 04-00050) work with the 5/8-24 spark plug holes, typical of most engines.
Way way too small for the typical 18mm spark plug hole common in aviation. Might work for 14mm, but if you’ve got a typical Lycoming or Continental, don’t bother with these.
Too small for 18mm spark plug holes.
Q&A
Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
