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| Northstar rebuild: Will style (Page 18/119) |
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Will
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OCT 02, 11:19 AM
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The manual calls for 140-170 psi cranking pressure and my engine has 190-200.... I think the gapless ring concept works... just needs some ironing out.
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Will
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OCT 13, 01:34 PM
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Allen Cline is of the opinion that there's enough reversion at part throttle to lift oil into the intake ports, where it would pool on top of the valves at shut down. This is what I was experiencing. I tried shutting the engine down at WOT once and after pulling the intake found no oil on the valves, however after a shut down from idle the valves would have half a teaspoon or so of oil on the back of EACH one. Talked with Total Seal and the machine shop who originally honed my block...
The block was honed with 400 grit stones, almost certainly silicon carbide. This does not work well with the Northstar as the hard silicon carbide stone against the hard cylinder liner produces a very shallow pattern. TS recommended an aluminum oxide stone not finer than 280 grit. In an amusing note, the Haynes manual for overhauling Chevies said to hone the block to 400 grit for cast or moly rings, but not finer than 280 for chrome faced rings. The TS rings are chrome faced. So even Haynes says it's wrong... <chuckle> The plant where my dad works has a profilometer which we can use to measure the cylider finish on the bores. That way I will have hard data to use in working with TS to get this engine to seal. I'll be pulling the engine and tearing it back down in the next couple of weeks. ------------------
Turn the key and feel the engine shake the whole car with its lope; Plant the gas pedal and feel in your chest neither a shriek nor a wail but a bellowing roar; Lift and be pushed into the harness by compression braking that only comes from the biggest cylinders while listening to music of pops and gurgles. Know that you are driving an American V8. There are finer engines made, but none of them are this cool.Luck, Fate and Destiny are words used by those who lack the courage to define their own future
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ryan.hess
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OCT 13, 03:48 PM
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Sounds like you got a winner!
| quote | Originally posted by Will:
So even Haynes says it's wrong... <chuckle>
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aaronrus
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OCT 14, 01:20 AM
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| quote | | Originally posted by Will:
Jstricker: what TSB's will I need to properly overhaul a '95 engine?
Thoughts? |
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i have a question for you.. is this a VIN 9 or a VIN Y ? if its a VIN Y, i have a set of VIN 9 heads and camshafts for sale, i'll sell them to you dirt cheap, as i need to get them out of my garage to make room for some 4.9L heads to work on for my 4.9L caddy. they are out of a 2000 seville STS, and only have 16K miles on them.
[This message has been edited by aaronrus (edited 10-14-2004).]
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Nashco
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OCT 14, 03:26 PM
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Very interesting Will. Dang... a profilometer, now that's blingin' measurement equipment! This is definitely one hell of a troubleshooting session you've been through so far, good research and good contacts! Bryce
88 GT
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Will
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OCT 15, 09:06 AM
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| quote | | Originally posted by aaronrus: i have a question for you.. is this a VIN 9 or a VIN Y ? if its a VIN Y, i have a set of VIN 9 heads and camshafts for sale, i'll sell them to you dirt cheap, as i need to get them out of my garage to make room for some 4.9L heads to work on for my 4.9L caddy. they are out of a 2000 seville STS, and only have 16K miles on them. |
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Are you still trying to sell those heads? 
I'll stick with the flat tappet valvetrain until I can get my hands on a VVT engine...
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Nashco
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NOV 02, 05:06 PM
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| quote | | Originally posted by Will: I'll be pulling the engine and tearing it back down in the next couple of weeks. |
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Your friendly neighborhood pest here to see if you've figured anything out yet....yes/no? Thanks. Bryce
88 GT
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ryan.hess
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NOV 02, 05:20 PM
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Will
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NOV 02, 08:29 PM
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No work was done on the Fiero since Friday 22 OCT, as I was on a brief float with the Kearsarge last week.
However, today I got the engine down on the ground and will tear it down tomorrow and get the cylinder surface finish checked and maybe get it rehoned by the weekend...<mental note: call Total Seal and get the P/N of that stone you it can be ordered tomorrow>
<mental note 2: find out about reusing N* head bolts with time serts wrt difference between $50 each GM gaskets with bolts and $30 fel pro gaskets without>
<mental note 3: order said gaskets in addition to new front and rear main seals and new w/p gasket which was missing last time>
<mental note 4: order more Loctite 518 (anaerobic goo for case half seal)> ------------------
Turn the key and feel the engine shake the whole car with its lope; Plant the gas pedal and feel in your chest neither a shriek nor a wail but a bellowing roar; Lift and be pushed into the harness by compression braking that only comes from the biggest cylinders while listening to music of pops and gurgles. Know that you are driving an American V8. There are finer engines made, but none of them are this cool.Luck, Fate and Destiny are words used by those who lack the courage to define their own future
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ryan.hess
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NOV 02, 08:42 PM
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| quote | Originally posted by Will:
<mental note 2: find out about reusing N* head bolts with time serts wrt difference between $50 each GM gaskets with bolts and $30 fel pro gaskets without>
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The N* head bolts need to be replaced if the head(s) are ever removed. That's why GM includes them in their gasket kits. Is saving $20 worth having do do this yet again? 
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