Tear Down and Reassemble Unstarted 1.7 built to 2270, 1.7 to 2270 Unstarted 10 Year Old Build Options

[Robroe]

Moved from topic of first start of 10 year old build to tear down, inspect and reassemble. The 10 year old build is from a 73 1.7 to a 2270. Stroked to 78 mm and 96 mm cylinder diameter. Heads are Ham/RAT with 36 mm exhaust and 44 mm intake. Both are nicely ported.

Have torn it down to the case and checking crank end play before I split the case and pull the cam and crank. So far, everything is new and looks in good order. I'm concerned about oil passages being blocked with old assembly lube so a complete tear down and reassemble is happening. Discovered stacked cylinder spacers (4) totaling .150". So looking to replace those with single spacers. So far I can only find .160" spacers from type 4 store and may just use them as impact on compression appears minimal. Was shocked to discover crank end play is .450"! Sure glad I didn't try to start this thing. Will check again in the morning to make sure I'm checking it correctly, but I'm doing the same thing on the videos such as Ian Carrs YouTube engine builds so pretty sure I'm checking it correctly. Now to figure out what to do about that huge end play.

Any thoughts about what to watch out for?

[technicalninja]

OK, that was weird...

Got a message that that link was current under attack/taken over and my security suite wouldn't let me connect.

It also said this type of trouble was usually temporary and the site would work properly later.

I've never hit that before???

I believe Raby gathers crankcase pressure data a bunch. I've seen multiple posts from him mentioning it. He uses it to judge ring sealing performance mostly (I think).

Dry sump usually SOLVES all of your crankcase pressure issues.
Most of the systems I've messed with have dedicated vacuum relief valves to NOT allow too low an internal engine pressure.
If I'm remembering properly those valves have "low" settings. They vent at 3-5" of vacuum.
I haven't messed with OEM dry sump at all with the exception of 911 stuff.

Most of "my" cars didn't rate dry sump from the get-go.