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Looking good. It is easy to forget when panels are removed, it can take many hours to get thr alignment right. Also on a frame off like this, you are probably shooting for better than factory panel gaps.
Great work, Exotec, - Outstanding, even! Your attention to detail is awesome.
I've missed a few updates so am going back through your thread. I notice on the picture below from your May 19 update, that the brake backing plate-to-axle housing bolts appear to be in backward. I don't know about Omegas, but on A body cars they go in from the backside of the axle housing and protrude outboard through the backing plate. You may want to take another look at this. They are oriented that way so that the oval head of the bolt can bear against the axle housing, thus preventing it from turning while the nuts are loosened or tightened.
Your picture.
My passenger side during disassembly. The nuts have been removed, but the bolts are still in place.
no, it‘s a 1973 Olds one. I got a rebuild kit from Cliff Ruggles to concert it into an ohc6 one
Cliff won't steer you wrong on jetting and overall tune. A later carb is better for reliability, a 76 and up Qjet would have been more ideal but you probably don't need the extra cfm for your OHC 6. The 2.85 first gear 3 spd should help launch without first being too steep. Similar to a TH2004R for gear ratios, first and second just slightly steeper, should be near perfect and a whole lot of fun.
with the help of some members it looks like we found the correct color I wanted! 1970 Oldsmobile Aspen green 45 - tomorrow my mate will paint a sample.
ordered the MOMO Etna wheels in 18x8.5 with 35mm offset and 6.1BS - should go with 245/40R18 Falken tries. most likely I'll need to run a 20mm adapter per side. was a Black Friday buy 3 get 1 for free. shipping to Austria will last....
But what I received already is a small color touch to the ThreeOnTheTree
Making progress I was never a big Nova/Omega fan but yours is really going to be nice. I like the stance in your drawing ! Certainly an unusual combination with the OHC 6 and three speed.
When Franz was looking at the cam he said: wau, this is a sharp one, very steep! Will be a challenge to turn the cam. And he was right.
his first inline 6 he was working on back in the seventies was the Datsun/Nissan Laurel 2.8 and with the hundreds of rebuild engines since then, he can’t remember such a hard to turn only the cam like the ohc6
My brother still was not happy with how the cam turned around. So we installed the accessory housing, the crank cog pulley and the belt. With the first turn the snout neatly and completely snapped right off!
Ok, cam tower must go off again. Let’s measure some numbers according to the rebuild guide Jeff B. Hamlin once provided us.
✅ Cam tower rail surface and top of the valve steams 0.850 and within the tolerance!
✅ Lash adjuster can be compressed all the same value!
🛑 Valve lift exhaust 0.444 and intake 0.375 --> this is much to less!
Then let’s uninstall the valve springs and see what’s the reason for. Unfortunately, the motor shop didn’t take care about the valve lift when they installed new valve guides. They installed the new ones to be flush in the head on the camber side but didn’t check the lengths on the spring side.
We called the shop owner and discussed our findings. My brother and the motor shop founder a friends since ages, his twins (run the shop meanwhile) and my nephew as well – the engine shop does a lot of motor overhaul for my brothers business. The shop is closed till January 3rd, then my brother will stop by and they will fix the valve guide length.
Motor shop cut the valve guides to the correct length and my brother and I could proceed with the assembly of the Pontiac ohc6 sprint with Holley Sniper for my 73 Oldsmobile Omega!
June 19th, 2021, 05:41 AM
I was never a big Nova/Omega fan but yours is really going to be nice. I like the stance in your drawing ! Certainly an unusual combination with the OHC 6 and three speed.
