• Wishlists
  • 877-477-7823
  • Contact Us
 
 
FREE SHIPPING ON ORDERS OVER $350 (USA ONLY - SOME EXCLUSIONS APPLY) | 877-4-SPRUCE

SPARK PLUG HOLE PROTECTIVE CAP

$0.24/Each
Quantity
Add to Wishlist
Part# 15-06003
MFR Model# VC937-16 BLK

Overview

#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".
  • Customers Also Viewed
  • Frequently Purchased With

Reviews

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.

Brian E
December 31, 2018

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.

Greg W
June 22, 2018

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.

Morgan
January 30, 2018

Too small for 18mm spark plug holes.

Zane J
December 16, 2017

Q&A

View in Catalog

View Image View in Catalog