Thread: What do you engine guys see here?

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Those ring filers are pretty slick. Found the KD one mentioned above here for around 58 bucks, hope this helps.
Save on KD Tools 870 at ToolTopia.com

I would tear it apart before anything else to see what happened. I've used plasma ceramic rings with good success.

Don i've used one of these Speedway type for years without any problems.

This one works good, i also have the electric version.

Precision Piston Ring Filer - Speedway Motors, America's Oldest Speed Shop

Originally Posted by Itoldyouso

Thanks Bob. Roger sent me a PM too, telling me how to find previous posts. Once you guys explained how it was pretty simple.

Pat, thanks for that info on the rings. Is it preferable to buy the ones you have to file to fit over the ones that you don't? I think I will buy a ring filer and do them with that. I saw them using one on one of the car shows on TV and it didn't look super expensive, but it was better than using a hand file.

Today when Dan gets off work we are meeting the guy who is selling the bare 455 block. Sure hope it looks good and if it does I'll drop it off at the machine shop tomorrow.

Don

you should not just think a set of drop in rings have the right end gap .many times they do not...... but its better to file off 002 to 004 set of drop in rings them to buy file fit rings . you need to check end gap.... ring tools are not much money for many years i used hose clamps and clamp a file sicking off one of the arms off a engine stand and file many many sets this way.... .i use a adjustable square set it at one inch then check ring in the wall in 3 spots then check your end gap i use a fine stone to break all sharp spots off the ring after filing them .if you fail to do this you will phuck up the cylinder walls

Pat, when we get to the point of installing rings I'll be back with more questions for you guys.

Thanks,


Don

even if it does`nt clean up 100 % it will still be ok .. my 351 has a few cylinder scratches and run just fine .. 98% seal is good also

Looks to me like one of the ring lips on the piston could have broken off also.

I've been wondering if that is what we are going to find also.



Don

a ring land could of busted . i never look at your piston numbers.. but pistons tops and ring lands do bust out from piston rings with no end gap . hyper pistons will bust the land out as most need more end gap. i got in to checking all my ring gaps many years ago so i knew all the rings were the right size for bore like a 040 over in a 030 ring box seen rings mixup missing and chiped and bent in new ring box it happens .i never assume any new parts are right or they fit .some guys think its all new and fresh machined just bolt it up ? i know many storys of stuff not fitting i sure jerry know s some to .. of stuff not fitting or a guy not checking a parts for fit .the one you do not check is the one that bite you in the ass .

Pat, here is what Sealed Power quotes about these pistons:

Forged Piston 0.142 Dish, 4.125 Bore, 4.250 Stroke, 6.735 Rod, 455 Oldsmobile
$53.99Part Number: L2323F
SKU: L2323F
Brand: Sealed Power
Price: $53.99
TRW Power Forged pistons have become the standard by which pistons

are compared. The complete piston manufacturing proceess, from the

raw materials to the finished product is directly handled by TRW.

From OE type replacement to all out racing motors, Power Forged

pistons provide the same dependable performance experienced by

winners of countless races every week! *Compression ratio is

figured with 70.0cc heads.




Forged Piston 0.142 Dish, 4.125 Bore, 4.250 Stroke, 6.735 Rod, 455 Oldsmobile (L2323F) Specifications
Forged Piston 0.142 Dish, 4.125 Bore, 4.250 Stroke, 6.735 Rod, 455 Oldsmobile (L2323F) Specifications
Bore Diameter (in.): 4.125
Compression Ratio: 10.0:1
Dish / Dome Volume (cc): -18
Pin Height (in.): 1.735
Ring Package: 5/64 5/64 3/16
Rod Length (in.): 6.735
Stroke (in.): 4.250
Weight (grams): 672
Wrist Pin Type: Pressed


Don

well don long as you know that new pistons can be smaller then were they should be see it all the time .so lets say he put the piston in at.0025 or less piston to wall if you have a smaller piston by .001 and that piston he fit it to the bore it could be .003 les on end gap . so you could at or less then .014 for end gap thats way to small for a top ring heat makes them grow

If EVERY set of pistons you have used vary that much I got a few tips for you---

Get a better measuring tool-----
Get someone else to measure them---
buy a different brand of pistons---

I doubt that the 4.030 pistons measured anywhere near 4.029-4.031(maybe 4.025---)

Originally Posted by jerry clayton

If EVERY set of pistons you have used vary that much I got a few tips for you---

Get a better measuring tool-----
Get someone else to measure them---
buy a different brand of pistons---

I doubt that the 4.030 pistons measured anywhere near 4.029-4.031(maybe 4.025---)

Ooops! I stand corrected. My example was bad. Cylinder bore may have been within that range but forgot about piston to cylinder wall clearance and true diameter of piston.

Originally Posted by jerry clayton

If EVERY set of pistons you have used vary that much I got a few tips for you---

Get a better measuring tool-----
Get someone else to measure them---
buy a different brand of pistons---

jerry you must remember them old trw s i have had sets of pistons that were.001 smaller in a set.i had one set had to wait for them for two month KBs one was 001.5 . i used it and fitted it to the hole she was going in do it all the time some guy will walk in with blow up pistons and no money and clean the skrits and bore/hone them to each hole...jerry your just use to work with nice pistons .i get lucky some times was week 3 cylinder ford sleeved 3 holes honed it to day for new mahle pistons and sunday a 4.611 bore bbc diamond pistons both sets were good for size

Originally Posted by pat mccarthy

jerry you must remember them old trw s i have had sets of pistons that were.001 smaller in a set.i had one set had to wait for them for two month KBs one was 001.5 . i used it and fitted it to the hole she was going in do it all the time some guy will walk in with blow up pistons and no money and clean the skrits and bore/hone them to each hole...jerry your just use to work with nice pistons .i get lucky some times was week 3 cylinder ford sleeved 3 holes honed it to day for new mahle pistons and sunday a 4.611 bore bbc diamond pistons both sets were good for size

I used to use alot of TRW forged pistons for my builds back in the day and what you say here is true. I see that sealed power or federal mougal owns them now. Also it's been near 30 years since I've built engines. Really out of touch with the newer stuff and the apparent improvements in manufacture tollerances of parts and pieces now days.