roller lifters with 2.8

[trotterlg]

That is so common with the hollow cam with pressed on lobes. When they fail at the last bearing every thing keeps running except the oil pump. Larry

[3400-95-Modified]

Yeah and with no oil pump running odds of the bearings spinning on the cam journals are very high... I wonder if this block is any good for him.

[1988GTU]

Nice that GM designed high mileage displacement on demand for these motors...

Check that block over real good, might just be a boat anchor.

[trotterlg]

When it quit is looks like it was running on cylinders 1,2 and 3 only, so I doubt he ran it long like that. Larry

[1988GTU]

Those cam bearings are def going to neeed replacing. Hope they didn't spin in the bore.

[trotterlg]

At least we know that half of them didn't spin. Larry

[Guest]

I came into possession of a similar engine, 3400, where the came split in the middle so cylinders 1,2 and 3 were still working. The block appeared fine, as in the came bearings didn't seem to spin in the bores. I was told that the engine lost power and shut off, though it would still run with no load.

I ended up keeping only the pistons, and a few other parts from it, since I had a much cleaner block sitting in the corner, just missing some pistons and a couple other parts.

This block may be fine, if it went the same way the one I had did, that would stall when put into gear, unless you revved the shit out of it before dropping it in.

[veekuusi]

Just like Mr 1988GTU said: a boat anchor.
Thats what the "new" Lumina block was.
The camshaft was break and the cam bearings had spin in the bore.
The block was no good .

I took the crankshaft main bearing caps from that block and machine shop did a
main line honing to the old block.
The result was satisfying.

And some pictures how the new crossram intake looks today.

[Mach 5]

looks great!! cant wait for next video. one question Are you stacking washers on your main studs??

[veekuusi]

looks great!! cant wait for next video. one question Are you stacking washers on your main studs??

The ARP main stud kit has too long bolts or too little thread in them.
I had cut them shorter with a hacksaw .
But the machine shop seems to put now one extra washer , that you can see in the picture.
One thicker washer would be better than two, I suppose.

[ForcedFirebird]

Glad to see the project going again.

Curious to see exhaust gas temperature for the middle cylinder of each side.

[Purple pit]

I'm not to sure about this one. I like the runner length though. If there is a way you can do it a shape like a horn on the plenum end of the runner helps "signal strength" to the carbs(for the next intake). Also has a nice little ram effect.
Plenum total size seems to be close to stock. Your throttle changes alot and I'd think you are going to need more. Enough has been said on the middle runner problem, so I'll hold off on that. What happend to the cross ram idea?

[Mach 5]

I had this question so I called ARP and they said that it will act as a bearing. Ill have to call my machinist for the correct part # for better studs that are the right length that I used on my engine. I will let ya know. I just don't want to see you have another main failure

[ForcedFirebird]

I had this question so I called ARP and they said that it will act as a bearing. Ill have to call my machinist for the correct part # for better studs that are the right length that I used on my engine. I will let ya know. I just don't want to see you have another main failure

You should read the whole thread. The failure came from oil starvation due to RTV bits stuck in the dry sump.

[3400-95-Modified]

I had this question so I called ARP and they said that it will act as a bearing. Ill have to call my machinist for the correct part # for better studs that are the right length that I used on my engine. I will let ya know. I just don't want to see you have another main failure

That is also the only stud option that they sell that fits our setup without going into asking them to design a new bolt length/thread combo. Trust me I think Ben has looked through it many of times trying to get the right length since he was the one that sourced these bolts. They are not "kits" they are simply chosen bolt lengths that work with washers. If your that concerned go find some tool steel and make a spacer so its one solid part, or weld the washers together so it acts as one.