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Posted: 7/1/2010 6:08:32 AM EST
Out of my 1995 Corolla, 1.6 liter.   Jasper engine has about 90,000 miles on it.   Didn't like the fraction of a second on initial start (sounded the worse after engine was at operating temperature, shut engine off, and then restart after 15 minutes or so) that it sounded like there wasn't any oil in the engine.    Guessing the "worse time" when starting was when the engine was warm, the oil was warm, and it had leaked passed the bearings.  

Engine still runs good, and hardly uses any oil, but damn, now what do I do?    Can I put new bearings in it and call it "fixed"?     Crank looks "good" yet, with a tiny bit of wear.  

Oil pump side is the best looking bearing, with the space between the bearings is where the center bearing should be.    Left the center bearing in (cracked it loose) since I was afraid all the guts of the engine would fall out.    

vmax84




Link Posted: 7/1/2010 6:17:42 AM EST
[#1]
I've seen better bearings come out of the block of a dragster that didn't make it to the finish line.




You KNOW what the right answer is.





Fix it right, fix it ONCE.  Fix it WRONG,  you'll fix it again...or trash it.
Get QUALITY bearings in the first undersize that will work and have your automotive machine shop grind the crank to match.





The block needs a full inspection as well.  Oil passages, coolant passages,  etc...check the oil pump,  all that stuff.
Do it right and you'll feel good about it.  That engine should have a LOT of life left on it...if this is done right.
CJ




 
Link Posted: 7/1/2010 6:27:19 AM EST
[#2]
Quoted:
I've seen better bearings come out of the block of a dragster that didn't make it to the finish line.

You KNOW what the right answer is.

Fix it right, fix it ONCE.  Fix it WRONG,  you'll fix it again...or trash it.


Get QUALITY bearings in the first undersize that will work and have your automotive machine shop grind the crank to match.

The block needs a full inspection as well.  Oil passages, coolant passages,  etc...check the oil pump,  all that stuff.


Do it right and you'll feel good about it.  That engine should have a LOT of life left on it...if this is done right.


CJ
 


I need to run and pick up another jug of whiskey  , but any idea why this would happen?    When Jasper redid the engine, did the machine shop put the wrong bearings in it, too "tight" of a bearing, or, too "loose" of a bearing to do something like this.

But you're right with your pull the engine and fix it right.........  it's a really good car, and it is worth fixing.

vmax84

Link Posted: 7/1/2010 10:36:02 AM EST
[#3]
ive had a jasper motor before...in my trans am, its what the warranty company order and i had no say...
i personally broke down that motor once i got it and it looked ALOT better than that thing...they generally
are easy to deal with...see what they will do
Link Posted: 7/1/2010 11:01:23 AM EST
[#4]
Quoted:
ive had a jasper motor before...in my trans am, its what the warranty company order and i had no say...
i personally broke down that motor once i got it and it looked ALOT better than that thing...they generally
are easy to deal with...see what they will do


It's out of warranty.    I'm thinking somewhere along the way, the previous owners did something stupid with the engine, damaging it.    Who knows, doesn't matter now.  It's a good car and I'll fix it.

vmax84

What do these numbers mean off the crank bearing?
Thanks again.




You can click on the image to make it larger if you are having a hard time reading the numbers.

Link Posted: 7/1/2010 11:04:16 AM EST
[#5]
My guess is .50 mm oversize and the other number is probably a set matching number.  The other bearing in the pair probably bears that same number and no other bearing pair in that engine uses that same number.  Each pair has its own number.    Am I right?





CJ


Link Posted: 7/1/2010 11:10:32 AM EST
[#6]
And, here's a pic of a connecting rod bearing and the numbers on the back.    Again, what do those numbers mean?  

vmax84





Link Posted: 7/1/2010 11:15:43 AM EST
[#7]
Quoted:
My guess is .50 mm oversize and the other number is probably a set matching number.  The other bearing in the pair probably bears that same number and no other bearing pair in that engine uses that same number.  Each pair has its own number.    Am I right?


CJ


I think you're spot on with the ".50mm" number......I'm guess that's the oversize as well.    As for the other numbers, you're probably right on that, too.     This would be a lot more fun if it were someone elses engine.    

vmax84
Link Posted: 7/1/2010 11:34:10 AM EST
[#8]
IMO, this engine has seen oil starvation and on more than one occasion.
Link Posted: 7/1/2010 11:42:20 AM EST
[#9]
Quoted:
IMO, this engine has seen oil starvation and on more than one occasion.


Hmmmmmmmm............when I got the car a year ago, I did notice the temperature guage was reading low (cool).    I changed the thermostat and the guage went to the middle of the display (it now reads exactly like my other Corolla's temp. guage, right in the middle of the display).    So, the engine had run "cold" for some period and never was warming up to correct operating temperature.    Could this have anything to do with it?

vmax84

Link Posted: 7/1/2010 11:46:14 AM EST
[#10]
I sell a lot of marine Jasper long blocks I have only had one go bad and it was a cam/distributor gear issue.
Link Posted: 7/1/2010 11:48:08 AM EST
[#11]
Quoted:
I sell a lot of marine Jasper long blocks I have only had one go bad and it was a cam/distributor gear issue.


I guess in all fairness to Jasper, it probably wasn't their fault, but the lack of maint. on this engine which has lead to this.

vmax84
Link Posted: 7/1/2010 12:20:15 PM EST
[#12]
Quoted:
IMO, this engine has seen oil starvation and on more than one occasion.





yep

Link Posted: 7/1/2010 12:21:33 PM EST
[#13]
Quoted:
Quoted:
IMO, this engine has seen oil starvation and on more than one occasion.


Hmmmmmmmm............when I got the car a year ago, I did notice the temperature guage was reading low (cool).    I changed the thermostat and the guage went to the middle of the display (it now reads exactly like my other Corolla's temp. guage, right in the middle of the display).    So, the engine had run "cold" for some period and never was warming up to correct operating temperature.    Could this have anything to do with it?

vmax84



That will cause problems but I don't think it would cause what you're looking at on those bearings. That engine has seen inadequate lubrication / low or no no oil pressure. I bet if you call Jasper and send them the pics they'll tell you the same thing.

My son runs a parts story that sells Jasper. They're never had a bad one but they're a small store so they don't sell that many.

The markings on the bearings are the oversize as someone said before.

Edit: One other possibility that tracks with your thermostat troubles. Has the head gasket been blown and then replaced?. That will often kill a thermostat if it was overheated. That might also mean it had some anti-freeze get into the oil at some point. That will wipe out bearings pretty quickly.
Link Posted: 7/1/2010 4:07:15 PM EST
[#14]
So which bearings should I put back in it?     Which is the more durable brand?

vmax84
Link Posted: 7/1/2010 4:31:31 PM EST
[#15]
Your going to have to have the crank machined to go along with the new bearings.  You need a machine shop.  And if you don't know what your doing then you will probably be doing this twice.
Link Posted: 7/1/2010 4:48:00 PM EST
[#16]
Quoted:
Your going to have to have the crank machined to go along with the new bearings.  You need a machine shop.  And if you don't know what your doing then you will probably be doing this twice.


That's how I normally do things...........at least twice.    

vmax84
Link Posted: 7/21/2010 10:51:14 AM EST
[#17]
Quoted:
So which bearings should I put back in it?     Which is the more durable brand?

vmax84


I would guess that none of them are going to be durable without oil.  Federal Mogul comes to mind, but lots of these parts companies have bought up smaller companies, so there isn't really a good way to tell what you are getting anymore.  Make sure that after they turn the crank it gets a polish.  It should look like a mirror when done correctly.

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