DP #24 Engine failure....

[Peter Ash]

Normal?

[Chris "drooze" Wertman]

Originally Posted by Peter Ash

Normal?

I would agree since they are new. What this leads to is an error in a prior conclusion where I "THOUGHT" I saw bluing on the bearings of motor #1 the pics really dont do the blue justice, it looks bright as gun blue. while the brown is crispy looking.

That said not seeing this coating before quite these colors and with taper to the blue that looks to me like its from heat. And to me, and on some others is quite in line with a rotational bluing, it also appears at the edges of the bearings most frequent.

In motor #2 the bluing is left in the parting areas where the bearings had not worn and it looks suspect, the mains as well a mix of blue and brown like that with pretty good dyno time and say 10 passes as well as some other part runs....the coating is still evident in large swaths.

So Im taking all my conclusions on "appearance" with the exception of actual surfaces with a microscope and throwing them away.

Just thought I would share it.

[mtkawboy]

That looks like heat prior to bearing spinning, prior to the rod breaking, prior to a hole in the block with a rod sticking thru it. Remove intake & valve covers, toss rest in dumpster {428}. That was an oiling problem in them. Dont know anything about these new motors except they haul as#

[Chris "drooze" Wertman]

Originally Posted by mtkawboy

That looks like heat prior to bearing spinning, prior to the rod breaking, prior to a hole in the block with a rod sticking thru it. Remove intake & valve covers, toss rest in dumpster {428}. That was an oiling problem in them. Dont know anything about these new motors except they haul as#

I know thats what the LOOK like, Im glad someone else came to that conclusion and Im not just a COMPLETE moron.

Those bearings are BRAND NEW Out of the Plastic !

Its something in the way they are treated. They are ACL Racing Bearings Made in Australia

These are AFTER they were cleaned with tet and scrubbed dry.

The bearings and all their sisters brand spankin in the plastic look the same , except in all there is variation on the coating/heat treating, the backs are BROWN like BURNT heat Brown......

But they are BRAND New....

[art leong]

That is the coating just wash in soap and water and install. Do not try to polish them.

[Chris "drooze" Wertman]

Originally Posted by art leong

That is the coating just wash in soap and water and install. Do not try to polish them.

Thanks Art....yeah no polishing for me, I just wanted to post a pic....

I have not seen that deep a blue around edges before the rod bearings are worse, and not the "brown" ive seen some "odd" coatings, but none that exactly follow the pattern (on one side of the shells) that looks like there was rotational friction and heat.

There in at .0036 across the BOARD ! On the spot double checked....I grabbed some XS for the extra clearance, those are matched set.....and well the crank I got was all B sized Journals....the other one that was in it was like BBCAC....althought the other one in my shop isnt much bett

Cheers

Chris

[Rich Biebel]

Clevitte H's with the ugly looking chemical wash........They didn't alwasy have that blue/ brown look........they were more of a grey/ blue color.

I've tried them all........used those mostly because they are easy to get and reasonably priced and hold up fine....for the most part.

I tried something different in my LT-1 Stocker.....I think they were Federal race bearings......270 degree groove on the mains......that engine went well over 100 runs with no problems and saw over 7000 every run....Car was sold.....

Best bearings I've used on a customers 454 engine.....C&A's.........went hundreds and hundreds of runs with no problems.....and this racer had some failures here and there that was pretty costly. A very heavy car that wheelied all the time.....and could run high 9's.....

[SSDiv6]

Originally Posted by drooze

Those bearings are BRAND NEW Out of the Plastic !

Its something in the way they are treated. They are ACL Racing Bearings Made in Australia

These are AFTER they were cleaned with tet and scrubbed dry.

The bearings and all their sisters brand spankin in the plastic look the same , except in all there is variation on the coating/heat treating, the backs are BROWN like BURNT heat Brown......

But they are BRAND New....

Drooze...what is the date on the packaging or bearings?
Many high performance bearings that contain an aluminum layer, will get surface corrosion if they are stored improperly and have even seen this happen on new boxes were the bearings came wrapped in plastic.

[Chris "drooze" Wertman]

Originally Posted by SSDiv6

Drooze...what is the date on the packaging or bearings?
Many high performance bearings that contain an aluminum layer, will get surface corrosion if they are stored improperly and have even seen this happen on new boxes were the bearings came wrapped in plastic.

4/6/08 feel clean as as a whistle....but good info, didnt know I needed to check my bearings for an expiration date

(Then again you could be like my dad , he drank 2 glasses of milk from 1/1/10 last week......blllleeeeeeaaaahhhhhhh he said "Nah its still good I hadnt opened it".........said it was fine....ugh)

[Tom Goldman]

I've used ACL'S for the last 4 years on my BBC engines. ..They are supposed to look like the picture, they have no overplate like street bearings do. .....ACL's have a slightly wider oil relief band at the parting line,than Speed Pro/ Federal Mogual bearings do..........I've also noticed they maintain their crush in the bore better as well. ..............I havn't used or even seen shiny race bearings in the last 15 years!. ...........Tom