1979 SC Chewed a Valve - Total Rebuild

[Flat6pac]

The 964 cam carriers were in the mix at the 89 production run, maybe even 88.
Get the cylinder dividers powder coated and never be concerned in the future.
Bruce

[mikedsilva]

Originally Posted by OsoMoore

Sandblasting cleared off the rust? What did it cost you to get the blasting plus coating done?

dont buy new ones. Total waste of money. Powdercoaters will blast and coat those for a pretty small amount of money.
If you aren't too bothered, just get some flat black paint from your autostore and have at it. Don't overthink this part of your build. Unless you are building an "instagram engine"....

[Henry Schmidt]

Originally Posted by Flat6pac

The 964 cam carriers were in the mix at the 89 production run, maybe even 88.

I'm confused. What is the relevance of that comment? Were you commenting on my conversion?

[Flat6pac]

I was just saying the 964 cam carriers were in production in 89 for the 3.2 so the change was worked in pre 964 runs.
I didn’t recall in 225 postings your conversion was involved

Bruce

[OsoMoore]

Originally Posted by mikedsilva

dont buy new ones. Total waste of money. Powdercoaters will blast and coat those for a pretty small amount of money.
If you aren't too bothered, just get some flat black paint from your autostore and have at it. Don't overthink this part of your build. Unless you are building an "instagram engine"....

I'm just having a little difficulty finding someone to do it. I messaged three different companies which I discerned from Google searching did blasting and didn't get any replies. I'm going to get on the phones on Monday I guess.

This is currently holding up my rebuild progress.

[mikedsilva]

Originally Posted by OsoMoore

I'm just having a little difficulty finding someone to do it. I messaged three different companies which I discerned from Google searching did blasting and didn't get any replies. I'm going to get on the phones on Monday I guess.

This is currently holding up my rebuild progress.

https://www.yelp.com/search?cflt=powdercoating&find_loc=Milwaukee%2C+WI

[Henry Schmidt]

Originally Posted by Flat6pac

I was just saying the 964 cam carriers were in production in 89 for the 3.2 so the change was worked in pre 964 runs.
I didn’t recall in 225 postings your conversion was involved

Bruce

We build a lot of engines from scratch (no core) so sourcing things like good/usable 49mm cam housings is becoming more and more difficult. This conversion is just another option.
We are also line boring 47mm 3 and 4 bearing housings to 49 mm to alleviate some of the sourcing issues.

[911 Rod]

Originally Posted by OsoMoore

I'm just having a little difficulty finding someone to do it. I messaged three different companies which I discerned from Google searching did blasting and didn't get any replies. I'm going to get on the phones on Monday I guess.

This is currently holding up my rebuild progress.

That's because shops that do this kind of thing are slowly fading away.
I think I paid $300 and they had to weld up some holes from sandblasting.

[OsoMoore]

Originally Posted by 911 Rod

That's because shops that do this kind of thing are slowly fading away.
I think I paid $300 and they had to weld up some holes from sandblasting.

Called 4 places, ended up finding the guy the local Porsche shop uses.

The clue was when I texted pictures of the baffles on my bench he recognized the engine just by the baffles. Its costing $250 here in Milwaukee.

[OsoMoore]

Cleaning cam towers with 800 grit dremel this morning, coming out well. Pics later.
Picking up powder coat baffles tomorrow. Maybe I can put together this top stuff this weekend!

[PeteKz]

Maybe just me, but powder coating seems over the top for tin baffles--not like anyone is gonna see them! If I need to paint/recoat mine, I'll try electro-galvanizing them. I can do that in my shop, and it's more corrosion resistant than paint.

[mikedsilva]

Originally Posted by PeteKz

Maybe just me, but powder coating seems over the top for tin baffles--not like anyone is gonna see them! If I need to paint/recoat mine, I'll try electro-galvanizing them. I can do that in my shop, and it's more corrosion resistant than paint.

I build engines for other people (not as many as some others have, but they are all successful and leak -free builds under my belt now).
They are usually the sort of owners that want to do it once, do it right, and have something they can share photos of with their mates; something to brag about and be proud.
For a couple hundred bucks, I get all engine tins powder coated.

I also get parts vapour blasted, cerakoted, zinc plated etc. Lots of stuff cannot be seen afterward. But during the process of assembly, I take hundreds of photos and progress vids for the owners. They appreciate it, write me nice testimonials and tell their friends.

I agree, a lot of items won't be seen again, but it's a nice 'journey' and experience for the average owner who only wants to do it once.

[OsoMoore]

I was in the position where I needed them at least blasted, because I couldn't get the rust off myself. And once you blast it, my understanding is you need to get it coated immediately or it will flash rust.

I might have been able to get it sandblasted and then immediately paint it, but I didn't see a good way to get there. So while I wish I could have a few bucks on an invisible part, I am content.

[PeteKz]

If you're content, that's what matters.

Mike, I get the reason you powder coat the baffles for your customers. I think gold colored zinc plating would look pretty trick too.

[OsoMoore]

Pretty baffles are back. I'm gearing up to put together the top end this weekend.

How do you all clean the inner journals of the cam towers? I can't reach my fingers down there, so the best I've managed is a cloth on the end of a stick, or the tip of a very long brush.

[OsoMoore]

Worked on those journals with a long brush and some twisted fingers. Now the baffles are on... hoping tomorrow morning I can get the uninterrupted time to do the headers and cam towers!

[OsoMoore]

Watched some more videos to prep and saw people using "wavy washers" for the cam-to-head nuts.

I don't have any of those... do I need to get some?

[ammonman]

I may have missed it somewhere along the way but did your shop remove, clean, and re-install the oil spray tubes in the cam carriers? If so, be sure to verify the spray holes in the tubes are correctly oriented to spray on the rockers.

[OsoMoore]

Originally Posted by ammonman

I may have missed it somewhere along the way but did your shop remove, clean, and re-install the oil spray tubes in the cam carriers? If so, be sure to verify the spray holes in the tubes are correctly oriented to spray on the rockers.

Yes, spray tubes were redone and all clear. I also tested them with compressed air before assembling.

Cool pics in a second, but question first: the nuts holding the cam towers to the heads are nylock nuts, but some studs in the heads are short enough they don't emerge to fully lock into thy nylock band.
Am I using washers that are too thick? The washers came in my giant "washers and gaskets" kit. The nuts I bought on McMaster Carr.

Here are some pics of the ones that didn't stick out as far.



That aside, here is the engine starting to look a bit like a real 911 engine again!

[dannobee]

No nylocks on the cam carrier to heads. Use standard nuts and spring/wave washers. And there should be 3 barrel nuts on each side. Total of 6 barrel nuts (901 111 271 00) and 34 standard M8x1.25mm nuts (900 076 064 02). The washers and nuts you used look like those for the valve cover gaskets.