Just my luck...

whitelightning2 · Posted: Thu Aug 21, 2008 10:40 pm Post subject: Just my luck...

So after my 13.08 @ 105.5 MPH run i noticed a slight knock from the 3500, nothing terrible but it was there..

I kept the RPM's low all the way home and started investigating that night, didn't find anything right away and it seemed to have stopped.. so i drove it to work, was fine in the morning but in the afternoon heat the engine really warmed up and the knock came back.

I pulled the pan tonight to check and found that #1 rod bearing was spun Sad

the rod cap is scratched up a little but the crank looks fine, i'm going to check the crank with the micrometer this weekend. If it's ok and the rod end is still useable i might just toss another bearing in there (i have a set of spares) and hope it lasts.. lol

I have yet to pull the rest of the rod caps but i plan on it, this is on a bottom end with roughly 3K miles running Mobile 1 10W30. Sad

projectcavalierz24sc · Posted: Thu Aug 21, 2008 10:53 pm Post subject:

That sucks.
Why are you not running 5W-30?

daveycav90 · Posted: Thu Aug 21, 2008 10:55 pm Post subject:

hey sorry about that but it could be worse like my other 3400 it spun all the bearing and wrecked the crank, rods, and the block is junk Sad

good luck hope it works for you

whitelightning2 · Posted: Thu Aug 21, 2008 11:09 pm Post subject:

daveycav90 · Posted: Thu Aug 21, 2008 11:46 pm Post subject:

sorry to here that Sad

hope you get it back up and running

cavi_rs_94 · Posted: Fri Aug 22, 2008 5:44 am Post subject:

Man that sucks dave...what are you going to swap in now

whitelightning2 · Posted: Fri Aug 22, 2008 8:39 am Post subject:

cobra17st · Posted: Fri Aug 22, 2008 8:48 am Post subject:

That sucks, Dave.

You still thinking about taking it back to stock after you hit 12s?

slowolej · Posted: Fri Aug 22, 2008 11:49 am Post subject:

Couple Q's...

What rpm do you run to?
Have you measured rod big end ID at 2 points yet?
Does upper bearing have signs of heat discoloration on top of bearing, or is bottom of rod discolored from heat? It's a good idea to try and determine what killed your bearing.

Flushing passages might not be too hard. Remove oil pressure sender and use fuel pump in kerosene, diesel, or engine flush solvent of your choice. Leave oil pan off during flush. Simple, old fashioned oil squirt can with 10-30 will be enough to refill engine passages with oil after flushing. 10-20 pumps will go a long way.

Some people don't realize that synthetic oil doesn't guarantee anything. If you're heating conventional oil up so much it breaks down, maybe you want to reconsider your tune, fuel choice, etc. Conventional engine oils plenty good and changing conventional at 2000 mi still less $$ than running synthetics to 7000. The phrase "...and I was using synthetic" is not uncommon in blowed engine threads.

whitelightning2 · Posted: Fri Aug 22, 2008 12:26 pm Post subject:

oneredry · Posted: Fri Aug 22, 2008 1:45 pm Post subject:

sucks to hear that dude, time for some upgrades????

34blazer · Posted: Fri Aug 22, 2008 2:16 pm Post subject:

aww man that sucks a big fat bag of dix. oil starvation on that bearing at 6K+ rpms maybe? maybe loosen the tolerance on that journal? and maybe a HV oil pump?

91z24 · Posted: Fri Aug 22, 2008 3:03 pm Post subject:

Sucks Dave

Did those bearings are the stock one or did you already took the bottom end apart before ?

tiny1877 · Posted: Fri Aug 22, 2008 3:48 pm Post subject:

Those look like the bearings we took out of the VW motor in our dune buggy back in high school. We forgot about the oil journals on the first bearing and it spun. Oops!

Wondered why it turned over so hard the first time...

forced_firebird · Posted: Fri Aug 22, 2008 4:20 pm Post subject:

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