The engine ( a completely stock 1990 L98 Automatic transmission) is in pieces.
Heads are like new!
I must replace:
Crankshaft, Rods, Water pump, oil pump, rings and maybe a set of new pistons.

I must stay in a low budget, so I’m searching on low budget good replacement parts.
This is my first and the most important question:
Could I use a SCAT stock replacement Cranckshaft (1 piece rear seal P.N.
9-10526) ?
see: http://www.scatcrankshafts.com/stock...tcranks02.html
It is advertised as Standard replacement factory balanced and ‘READY to mount out of box’.
Is this a correct cranckshaft to use in my L98?
I need also a set of rods in the $200 / $250 range. Eagle rods are a good choice? SCAT Rods are best?
Wich bearings ??
I need also a set of std. Rings.
If I need a new set of pistons, wich pistons are the best to achieve performance and reability?
Wich water pump?
Wich oil pump?
I need also a set of gaskets with heads gaskets (correct thikness and correct material to stay between iron and aluminium), manifold gasket, oil pan gasket, water pump seals, and all seals, oring, gaskets engine related.
Where I can buy all these parts?? Salle Chevrolet? Summit racing?…. I need to buy all parts only from one seller due to freight charges from USA to Italy.
Thanks
Beppe.

 

.. I have to add to the list a timing chain kit ..... and .. all parts you think I need...:confused:
Thanks
Beppe.

 

Why a new crank? What happend to the original?

 

take a peek at the lingenfelter website under packages and take a look at the L98 crate engines. That will give you a nice recipe from which to begin your parts search.

 

a spoon bearing......... :mad

 

The L98 crate engines section has removed.....
I need an answer about the cranckshaft.....
the Scat 9-10526 -1 piece rear seal- is good for my L98????????:cry :confused:

 

Why not just take your crank to a good machine shop and have it turned? You could use the money saved for other parts. I have done this on quite a few engines and only had a problem once. That was with a '55 forged crank and they were know for having cracking problems.

 

What about a partial crate engine? If all you need is the bottom end you can get a ZZ4 shortblock (block, crank, pistons, rods) assembled with a warranty. Just swap your heads and accesories over onto it. It runs about $1900 complete.

 

You can try Northern Auto Parts, they usually adviertise in Car Craft, Hot Rod, plus they have a web catolog, sure I don't have the address. My car spun two rod bearings and I was able to re-use my crank, rods, and pistons. If had the budget at the time I would have went with some upgrades, but I was in the same boat as you. NOthing is wrong with stock corvette rods, save your money, and just have them magnafluxed and have new bolts put in.

 

Thanks to all for replies, but ... I cant afford a $2000 ZZ4 partial block, The Crankshaft can't be reworked.... (The bearing has turned in the rod race and milled over 0.13" on the crankshaft! ) ...YES 0.13" !!!! So I have to change rods and crank...
My question is allways the same...: Could I use a SCAT Stock replacement Crankshaft? You can se this crank at: http://www.scatcrankshafts.com/stock...tcranks02.html
part is 9-10526 1 piece rear seal.
Thanks

 

I would ask the machine shop you are planning to use what they recommend. I would also suggest looking for an engine kit for the rebuild from summitracing or Jeg's. Buying a stock type rebuild kits will help with you budget.

Spend a few bucks on good valve springs that are matched for the cam you want to run.

 

I dont know anything about that crank but if it is a CHEVY STOCK REPLACEMENT CRANKSHAFTS then I would think it is ok
Summit is selling a line of cranks from CAT they are OEM parts too, the cast crank is $190 and the rods are $190 but again I dont know anything about them use mostly Eagle or other brands.
The LT1-LT4 rods are really good rods too and they dont cost that much.
Clevite77 are good bearings, I would say that the hypereutectic pistons are what you wont they are a little better then stock.
I would call Summit Racing I think they have all you want in a rebuild kit, it may not be the Scat crank and rods because they have a line them self but sometimes you can ad to the kit and take out of it too.

Hope this helps a little.

Jay

 

doing the same thing and have the cheap but good route down, speedpro hyper pistons, off ebay $75, moly rings, summit $90, eagle rods off ebay $199, scat crank...from anyone $200 the engine shop will supply the rest, arp main studs are very smart. i'll keep the forum posted on my progress but with any luck i'll have a balanced & blueprinted bottom end with the above parts, all done on new sunen equipment for around $1500-1900

 

SummitRacing has a line of crankshafts, but they haven't cast crankshaft 86-later (1 piece rear seal) . I need a 1 piece rear seal....
Beppe.

 

I haven't heard of a crank that's "factory balanced"; they probably mean neutral balance. But since you're changing rods and/or pistons, you must always balance the rotating assembly. You might consider buying a complete balanced package of crankshaft, rods, pistons, rings, bearings.

In addition to Summit, I'd check out www.flatlanderracing.com as they have everything you need and some nice rotating assembly packages starting at $500.

Crankshaft- The Scat crank is a really good choice if you're on a budget; they have a good reputation. The 9000 series is a nice upgrade from their stock replacement line.

Rods- Eagle, Scat, Proline forged I-beams are all decent. If you change pistons also, I'd go for 6" rods.

Pistons- cast or hypereutectic from TRW or KB depending on budget, pressed pin. You didn't say what kind of mileage you have, but as long as its apart I'd replace the pistons. Have you checked cylinder bore size / roundness?

Rings- Sealed Power moly

Bearings- Clevite 77 P-series

Oil Pump- Melling, Milodon, etc; as long as you've heard of them. Use standard volume, high pressure

Gaskets- can't go wrong with Felpro; use the 1010 head gasket with copper rings for alum heads.

Water Pump- Stewart, Proline, or GM; make sure it's reverse rotation for serpentine belt.

Bolts- get new ARP head and main bolts.

Timing Set- Milodon, TruRoller; make sure it's for 87+ engine with roller cam!





[Modified by gcrouse, 9:27 AM 5/29/2002]

 

What's Jeg's? Do you have an address or web site?

Thanks,

 

http://www.jegs.com

 

Last time I checked they did. they had a 3.48 and a 3.75 stroke. I dont know about the balancing though....

found the part number for the 383 crank which is listed at $349.95 (I know, I know, it is not the cheap $200 crank)
ses-3-51-05-002
1986 and up 350 with 1 piece rear main seal.

I would have to look into an older summit catalog to find the part number for the 350 crank.



[Modified by bill mcdonald, 11:10 AM 5/29/2002]

 

dyno-flo.com has the scat crank you want