Collapsible push rod tubes are lifesaver when you've damaged one of your original push rod tubes. They allow you to remove the damaged tube, and replace it without pulling the cylinder head which would take you the better part of a day. They are a spring-loaded, two-piece design that seals with an o-ring in the middle.
They are very simple to install, but can be expected to "weep" oil over time being they are not a one-piece design like the original. If you have several bad push rod tubes, you might be better off pulling the head and replacing them with original style one-piece tubes. They are far less leak-prone, and much cheaper.
• Aluminum outer sleeve, stainless inner sleeve. Spring-loaded with sealing o-ring.
• Inner and outer seals sold separately.
Suitable for 1.9L and 2.1L Vanagons, 1983.5-91