Tangerine Pushrod Tubes & Seals, Did they work for you? Options

[pbanders]

Looking for feedback on the Tangerine pushrod tubes and seals:

http://www.tangerineracing.com/pushrodtubes.htm

Mine leak some, even with new seals, and I don't want to goop up the seals with silicone or whatever to fix it. Anyone else try these? Looking for feedback. My engine is a stock 2.0 L, I assume if I get these I just need the stock length? Thanks.

[Jake Raby]

Leaks are caused by assembly practices when it comes to stock tubes. Most of the time the seals are cut/ injured by a sharp edge or burr inside the bore of the cylinder head. This is usually at the entrance of the pushrod tube bore.

I assemble these using Molybdenum disulfide grease as an assembly lube and very seldom ever have to use sealant. If a sealant is used, make it Hylomar so the tube retains the expansion characteristics. A hardening sealant defeats this purpose.

A more common issue is the PR tubes contacting the exhaust tubing, which transfers heat into the tube and also shifts the tube off center of the bore, both of these will cause a leak.

Pushrod tubes could be made from Titanium to exacting specs, and if the installation practices are botched, you'll still have a leak. I use Viton seals and refurbish original 40+ year old PR tubes using zinc plating. My engines stay so dry underneath that they'll start to rust after a decade.