-
19th May 2012, 01:03 PM
#1
Freelander big end bearing help
Hi all,
I am posting this for a work friend. He purchased a Freelander with the 1.8, 16V motor and has found that the motor has done a big end bearing. It looks like this poor motor never had an oil change in it's life.
My question is where can he get new big ends from ? I've spoken to a couple of shops and the insist there is a blue/red/yellow dot on the bearing that tells me what it is. All there is on the bearing is a stamped G D then DD then the number LFB10023/Y
Does the letter Y relate to Yellow ?
Cheers,
Peter
-
21st May 2012, 06:46 PM
#2
Here is the procedure to check bearing selection on big ends
1. Record big-end journal code letters from
crankshaft rear web.
First letter is number 1 big-end bearing.
Record big-end bearing bore code numbers;
this will be 5, 6 or 7, located on the connecting
rod bearing cap.
2. Check crankshaft big-end journal diameters:
Big-end journal diameter = 47.986 to 48.007
mm
Maximum out of round = 0.010 mm
Big-end journal tolerance:
Grade A = 48.000 to 48.007 mm
Grade B = 47.993 to 48.000 mm
Grade C = 47.986 to 47.993 mm
Clearance in bearings = 0.021 to 0.049 mm
Big-end/connecting rod end-float = 0.10 to 0.25
mm
3. Select the appropriate big-end bearing shells
from the table.
4. Replace crankshaft if outside tolerance.
Big-end bearings size
Big-end bore
Grade A Grade B Grade C
Crankshaft big-end journals
Grade 5 BLUE - BLUE RED - BLUE RED - RED
Grade 6 BLUE - YELLOW BLUE - BLUE RED - BLUE
Grade 7 YELLOW - YELLOW BLUE - YELLOW BLUE - BLUE
Colour code on edge of bearing
Thickness progression:
YELLOW - Thin
BLUE - Intermediate
RED - Thick
If two bearing colours are to be used, thicker bearing
must be fitted to big-end bearing cap.
No the Y doesn't mean yellow LFB10023100L is blue LFB10023200L Red LFB10023300L is yellow.
What's the condition of the journal like, if the big end bearing has collapsed the crank will be no good.
Posting Permissions
- You may not post new threads
- You may not post replies
- You may not post attachments
- You may not edit your posts
-
Forum Rules
Search AULRO.com ONLY!
|
Search All the Web!
|
Bookmarks