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Kpeters Kpeters is offline
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Join Date: Nov 2019
Location: Costa Rica
Posts: 12
Porsche Crest Need help Id'ing custom? bearings

Hi Everyone,

Recently purchased a 1969 Targa L 2.0 which was supposedly ready to be assembled (it's a project) with mostly just aesthetic parts missing.

Well... turns out the engine is in REALLY bad shape, looks like it threw a rod at some point in its life and someone assembled it with VW rods (bent as well) and the crank got scratched so did the case.

To make matters worse seems it was stored for some time without spark plugs so there are several cylinders which have very high corrosion. Also there is one of them that has no corrosion, but for some reason it's cracked. And there was all sorts of junk almost as if mice were living inside the engine. Terrible....

To make the story short, right now I'm looking into the main bearing / rod bearing / re grinding / deal and I have a few questions.

The shop says the Mains will go to 0.25 on the case side (undersize?) and 0.50 (oversize?) on the crank side, and the rods will go to 0.50.

Now to cut to the chase...

The measurements on the mains confuse me a little probably since they have to rebore the mains tunnel and that's something I've never done before.

I live in Costa Rica and import taxes here are terribly high so here's my question.

Are there any guides on the internet, print or whatever I can use to find bearings that will fit the size of the journals and the mains? Even if that means machining the bearings width or machining the crank a bit more or a bit less?

I've been unsuccessful in my pursuit of finding info on the internet so far. I’ve only read something about using 3.0 sized journals with Buick bearings? Nothing about the mains aside from people suggesting I fill them with solder and re bore to use STD. (sounds dangerous)

The original Porsche ones which I think are the ones I need are very very expensive and apparently rare (specially for mains).

Can you please give me some advice? You can imagine we don't have many Porsche specialist engine rebuilders here.

Thanks.
Old 11-25-2019, 10:18 AM
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