Porsche 912 Cylinder Heads Rebuild With A Sneaky Surprise! Part 2

[@GarageTimeAutoResto]

Don't forget to LIKE ---> COMMENT -->. SHARE -->. SUBSCRIBE 😃

[@polloloci21]

Awesome stuff. Gives me some insight into what my mechanic had to do when I sent my 912 heads for a rebuild.

[@GarageTimeAutoResto]

Cool, more to come on these heads

[@1ocean515]

Impressed you took on those guides yourself!

[@GarageTimeAutoResto]

Hopefully, all goes ok. I want to be sure they are sized okay before I press them in

[@dominicmccartan8427]

Hi Tom, the spacers for the test stand finally turned up, so all going well I should have it running this weekend. Thanks very much.

[@GarageTimeAutoResto]

Shipping has been really slow recently. Forget about sending anything to France!

[@mattedwards4164]

Real enjoying your channel, very helpful content. It has inspired me to tackle, to my wife's despair, my own outlaw 911 rust bucket barn find restoration. 👍

[@polloloci21]

Paramatt Edwards 😂 “wife’s despair” 🤣

[@GarageTimeAutoResto]

Awesome Paramatt! Any questions, let me know. I still have a wife so far.

[@grantroberts4231]

cool to see this process. 🍿 bummer about that cracked head but oh well.

[@GarageTimeAutoResto]

That air injection system to reduce pollution is to blame. Or maybe I jinxed it there in the beginning?

[@fgjf1079]

Amazing work, knowledge and bravery. I would be too afraid of doing anything major involving the heads, and I would send them in to be handled by the pros.

[@GarageTimeAutoResto]

I might end up at the pros too, ha ha. I'm going to take it as far as I can, learn and share. Fingers crossed🤞

[@jockellis]

Those sodium filled exhaust valves are more expensive than those on a 930. I have a complete ‘68 912 engine except the valve train which I accidentally left when I moved. One of my three ‘81 Ford Escorts had a cracked head. I took it to the huge machine shop in town that did lots of work for the railroad shops. They were too busy so I took to a small shop beside the locomotive dead line. The manager said the crack couldn’t be fixed. I said, “Over at (the other shop) they said you couldn’t do it.” He grabbed it, Studies it and told me to take it to a nearby radiator shop to be welded. I took it back and he machined it. I had my typesetter’s husband install the head. I got another 50,000 mikes out of it.

[@GarageTimeAutoResto]

I'll probably get this crack welded by someone with a more powerful welder than mine. As long as the engine is t treated too badly it shouldn't re-crack. Good story about your heads! Thanks.

[@roundtailrestoration]

Good video, Tom. All of that math..that's required. If you're going to build an engine, you need to take those measurements!

[@GarageTimeAutoResto]

For sure

[@snowbumspaz]

Wish I saw this vid 6months ago when I was doing my valves

[@GarageTimeAutoResto]

Oh man, I hope yours turned out ok!

[@Kevin7563]

Goodness! you look for work to do

[@williamgrzesiak4500]

Rebuilding my '65 C engine now and glad I came across this. I have Pellow's videos but he sends his heads out and they magically come back perfect. Question: could several taps be used to weaken the valve guides, obviously being extremely careful not to contact the head? Seems like a lot of fabrication to build that stand (not that I don't think it's cool, but I couldn't make that).

[@GarageTimeAutoResto]

I think several taps might push the guides tighter into their bores. Not sure though as I've never done it that way. You are probably better off with a piloted reamer to drill straight holes. It's important that the head bores don't get messed up.

[@williamgrzesiak4500]

@@GarageTimeAutoResto As I read your reply, I think I mis-stated my question. When I said "Taps" I meant from a tap & die set. Shave a little more each time. BTW I bought your engine startup kit the other day. Can't wait to use it.

[@robertklutts]

Just wondering what size is your adjustable reamer is and also the ball hone? I am getting ready to rebuild my 1967 912 heads and these videos are awesome! Thanks Rob

[@GarageTimeAutoResto]

Hi Rob, I'll have a look at these and get back to you. The adjustable reamer only gets it close. I highly recommend a fixed reamer for the finish pass.

[@garyholznecht6737]

What are the number on the Nuway cutters you used?

[@GarageTimeAutoResto]

Sorry for the delay, I had to go look. 609 & 212 You will need an extra set of the long cutting blades or switch them back and forth.

[@garyholznecht6737]

Thank you. Would it be better to use three cutters instead so the two so the 70 degree cut (lowest cut) does not touch the valve guide?

[@GarageTimeAutoResto]

Ahh good question. I think two are enough. When I did the second head off camera I realized that the steel sleeve can be repositioned in the aluminum cutter housing for more clearance. I wasted my time making those loose guides. Hopefully this saves you some time, ha ha.

[@R.E.HILL_]

Cool video... Only one suggestion.. go metric.. for everything...

[@GarageTimeAutoResto]

I hear you. Metric is better. Unfortunately some of my tools aren't digital and don't read in metric

[@seanlyon2989]

well it is a metric car.

[@GarageTimeAutoResto]

A size is a size, no big deal. Unless you are giving me the greenlight to buy more tools😀

[@seanlyon2989]

@@GarageTimeAutoResto yeah buy more tools , a good valve spring compressor would be top of my list after watching your Heath Robinson contraption. It made me wince

[@GarageTimeAutoResto]

Have you seen the factory tool? Same

[@scottlagro1598]

Why didn't you just buy a valve spring compressor? It would have given touch better access to the valve parts.

[@GarageTimeAutoResto]

What's done is done, I made this 10 years ago and it's modelled after the factory spring compressor.

[@openhighwayproductions]

Great catch on the guides being sloppy. She might have been a smoker...

[@GarageTimeAutoResto]

For sure. Combustion chambers were full of smokey deposits