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-   -   2.7 Rebuild – To bore or not to bore and other questions (http://forums.pelicanparts.com/911-engine-rebuilding-forum/1082219-2-7-rebuild-bore-not-bore-other-questions.html)

Matthew_VA 09-05-2025 07:44 PM

what an amazing and informative thread! Great work!

Anglocanadian 09-06-2025 08:33 AM

I think you should go a little easier with the "blue", apply with a stencil brush and just colour the surface.

draw 10-09-2025 07:48 PM

Quote:

Originally Posted by Matthew_VA (Post 12527963)
what an amazing and informative thread! Great work!

Thanks, much appreciated!

Quote:

Originally Posted by Anglocanadian (Post 12528113)
I think you should go a little easier with the "blue", apply with a stencil brush and just colour the surface.

You're absolutely right...I took that pic after I globbed it on. I used an acid brush to remove the excess before I inserted the valve.

draw 10-09-2025 08:09 PM

After backtracking for nearly three months to modify my cam housings, I'm almost back to where I was.

But this gave me some time to make my own top dead center tool. Cost $20, worked perfect...

http://forums.pelicanparts.com/uploa...1760064706.jpg

I also had time to fabricate my own digital degree wheel. The rotary encoder was $50 and another $20 for the aluminum "fixturing"...

http://forums.pelicanparts.com/uploa...1760064706.jpg

Used the TDC tool to find calculated TDC...

http://forums.pelicanparts.com/uploa...1760064706.jpg

Set the DC43X-102 cams at 4.6mm lift at overlap for the 1-2-3 side...

http://forums.pelicanparts.com/uploa...1760064706.jpg

I was able to hit 4.58mm lift at overlap for the 4-5-6 side...

http://forums.pelicanparts.com/uploa...1760064706.jpg

Onward...

TheBrokePilot 10-11-2025 11:20 PM

Would you be willing to write up a DIY on how you made the tools? I'm sure I could figure it out but a guide is always nice.

Rosco_NZ 10-17-2025 04:42 PM

This should be the definitive build guide for a Mg case engine.

draw 10-19-2025 04:50 PM

Quote:

Originally Posted by TheBrokePilot (Post 12545977)
Would you be willing to write up a DIY on how you made the tools? I'm sure I could figure it out but a guide is always nice.

Sure, happy to share! The digital degree wheel is still mounted to the engine so I can't show that right now, but here's how I made the TDC tool...

I bought a TDC tool from Amazon. It's got an internal thread of 3/8"-16 tpi...

http://forums.pelicanparts.com/uploa...1760914121.jpg

Removed the "stock" screw and tacked it to an 8" length of 3/4" diameter DOM tubing. Nothing magical about this, it just happened to be in front of me at the hardware store. A schedule 40 steel pipe would have been cheaper...

http://forums.pelicanparts.com/uploa...1760916056.jpg

On the other end, I tacked a washer and a 3/8" nut so I could snug the tool down. I drilled out the threads so the threaded rod could move freely...

http://forums.pelicanparts.com/uploa...1760916056.jpg

Last is a 12" threaded rod with a slight chamfer at the piston end with a 3/8"-16 tpi nut welded on the other end. I had planned to use another 3/8" nut as a locknut, but I didn't need it. Plus, I forgot to buy one...

http://forums.pelicanparts.com/uploa...1760916056.jpg

Overall, this contraption cost about $20. I could've made it for $15 if I was more frugal.

I'll post the degree wheel when I have a chance...

draw 10-19-2025 04:51 PM

Quote:

Originally Posted by Rosco_NZ (Post 12548932)
This should be the definitive build guide for a Mg case engine.

Thanks, much appreciated!

snbush67 10-20-2025 08:02 PM

Quote:

Originally Posted by draw (Post 12544907)
I also had time to fabricate my own digital degree wheel. The rotary encoder was $50 and another $20 for the aluminum "fixturing"...

http://forums.pelicanparts.com/uploa...1760064706.jpg
..


Nicely done! I tried to make this but failed to get the 3mm threaded shaft on the angle finder connected before I mangled the circuit board. I ended up with some scrap. I did have a nice magnet attachment to the crankshaft though, did you use a magnet?



Shane

TheBrokePilot 10-21-2025 11:28 AM

Quote:

Originally Posted by draw (Post 12549944)
Sure, happy to share!

I'll post the degree wheel when I have a chance...

Thank you very much and please do!

draw 10-21-2025 03:23 PM

Back to where I was three months ago...

Rockers installed, valve lash set...

http://forums.pelicanparts.com/uploa...1761083453.jpg

Lower gasket installed...

http://forums.pelicanparts.com/uploa...1761083453.jpg

Lower valve cover installed, modified for twin plug by Henry at Supertec...

http://forums.pelicanparts.com/uploa...1761083453.jpg

Upper gasket installed...

http://forums.pelicanparts.com/uploa...1761083453.jpg

This is my engine. There are many like it, but this one is mine.

Valve covers installed. Cerakoted "Barrett Bronze" by Shaun at Tru6...

http://forums.pelicanparts.com/uploa...1761083453.jpg

Custom cam housing oil lines by Brad at 911rennen.com...

http://forums.pelicanparts.com/uploa...1761083453.jpg

http://forums.pelicanparts.com/uploa...1761083453.jpg

http://forums.pelicanparts.com/uploa...1761083453.jpg

Long block basically done!

Updates will be slow in coming for a while. Onward...


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