Oct 13th, 2022

WATCH NOW (PRE-RECORDED): RACE INDUSTRY NOW Tech Webinar with Kyle Fickler, Epartrade Director of Sales and Business Development and Charles Navarro, President & Co-Founder, LN Engineering LLC. Hosted by Jeff Hammond from SiriusXM ch 90.

Our model specific billet 6061 aluminum valve covers for Porsche Porsche 911 930 and 964 are a direct replacement for your old leak-prone factory covers with a design that pays homage to the factory parts, duplicating appearance as closely as possible to the originals. We have added the much needed rigidity to the gasket area while still keeping the covers nice and light. 930 covers include custom o-rings (at no extra charge) for sealing rather than factory paper gaskets, all while still keeping our covers nice and light.

These covers are machined to fit the OE factory seal (sold separately). Covers feature a black-anodized finish and fit all factory hardware. Available as a complete set of four: 2 upper and 2 lower covers. Made in the USA in our in-house manufacturing facility. Other finishes/colors are available special order.

T52140000 Billet Aluminum Porsche Cylinder Hold Down Nut w/ Delrin Inserts

Last year when we were rebuilding our own 2.7 engine and after putting the base shims with sealant on the engine, we used the traditional aluminum hold downs to secure each cylinder until we were ready to install the heads. We didn’t like how the aluminum on aluminum was scuffing the surfaces, so we came up with hold downs that feature replaceable delrin plastic inserts to solve this issue.

LN Engineering Billet Aluminum Cylinder Hold Down Nut featuring replaceable Delrin inserts. Threads onto the 10mm head stud to hold cylinders in place until you fit the cylinder heads. Sold as a set of 6 including a six replacement Delrin inserts. Features knurled ends and a matte clear anodized finish.

Air-cooled engine rebuild tips: make sure you're using the right sealant.

When rebuilding your air-cooled Porsche engine, it’s important to use the right sealant on the cylinder bases, even if you are using base gaskets or the cylinder is o-ringed, and especially when using shims to correct deck height. Although Elring Curil T or even K2 has been the choice for many engine builders, we’ve heard great things about Dow Corning 730 other than how expensive it is, so it’s certainly worth a look.

As most aircooled engines do not have head gaskets or flame rings to positively seal combustion pressure, it’s critical that the cylinder head sealing surface is properly resurfaced during the rebuild. Although our Nickies aircooled cylinders all have precision machined surfaces, some choose to lap the cylinders into their heads and many use Permatex’s Copper Spray-A-Gasket high temp sealant to lightly coat the sealing surfaces on the heads to help form a carbon seal.

If you haven’t read our engine assembly guides, we certainly recommend downloading them before embarking on any rebuild. There is a lot of great information provided there to help ensure a successful rebuild for your Porsche engine.