spun bearing
#1
spun bearing
Hi, "Y-aaawwlll"
Asked a question to a member but as of yet, got no answr.
Spun a bearing on my '01 xj8. found a crank on ebay that mikes to the 10th to the original so its a good match for the other conn rods/bearings. HOWEVER...found a replacement conn rod/piston (don't need the piston) on ebay. the numbers on the rod/cap are different than the # on mine. Ouestion: Does it matter as long as I get the right bearings and/or do a plastigage on the fitting?
Also: I'll find out soon enuf, but can the piston come out the bottom or do I have to ****** the head off? Thanx, Guys. (Gals)
Gimme an old 350 and I can build it blindfolded. These cats are a "different breed"
Steve
PS: WATCH THAT OIL!!!!!!!
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Asked a question to a member but as of yet, got no answr.
Spun a bearing on my '01 xj8. found a crank on ebay that mikes to the 10th to the original so its a good match for the other conn rods/bearings. HOWEVER...found a replacement conn rod/piston (don't need the piston) on ebay. the numbers on the rod/cap are different than the # on mine. Ouestion: Does it matter as long as I get the right bearings and/or do a plastigage on the fitting?
Also: I'll find out soon enuf, but can the piston come out the bottom or do I have to ****** the head off? Thanx, Guys. (Gals)
Gimme an old 350 and I can build it blindfolded. These cats are a "different breed"
Steve
PS: WATCH THAT OIL!!!!!!!
__________________
Buy and sell Cats.
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Maninahat98 (09-29-2013)
#2
#3
Why?
No light, no noise no nuthin. All of a sudden bearing noise. I assume the tolerances are so close that just a little lack of oil will score a bearing/journal. It never used oil but evidently ran low enuf to drain the sump turning a corner or whatever. I don't really kno. The way these engines are built it's even hard to identify the source of the noise. BUT.... there it was. ruined crank/conn rod. 1st journal. It seems to be rather common in these jags when they are oil starved.
No light, no noise no nuthin. All of a sudden bearing noise. I assume the tolerances are so close that just a little lack of oil will score a bearing/journal. It never used oil but evidently ran low enuf to drain the sump turning a corner or whatever. I don't really kno. The way these engines are built it's even hard to identify the source of the noise. BUT.... there it was. ruined crank/conn rod. 1st journal. It seems to be rather common in these jags when they are oil starved.
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#8
Hi, "Y-aaawwlll"
Asked a question to a member but as of yet, got no answr.
Spun a bearing on my '01 xj8. found a crank on ebay that mikes to the 10th to the original so its a good match for the other conn rods/bearings. HOWEVER...found a replacement conn rod/piston (don't need the piston) on ebay. the numbers on the rod/cap are different than the # on mine. Ouestion: Does it matter as long as I get the right bearings and/or do a plastigage on the fitting?
__________________
Buy and sell Cats.
Asked a question to a member but as of yet, got no answr.
Spun a bearing on my '01 xj8. found a crank on ebay that mikes to the 10th to the original so its a good match for the other conn rods/bearings. HOWEVER...found a replacement conn rod/piston (don't need the piston) on ebay. the numbers on the rod/cap are different than the # on mine. Ouestion: Does it matter as long as I get the right bearings and/or do a plastigage on the fitting?
__________________
Buy and sell Cats.
#9
Hey, Allan.
The question is: The stamped numbers on my conn rod/cap are different than the one I've located on ebay. I haven't found out just what the numbers denote but in my limited knowledge of Jag, they mean something, perhaps the size of the race for the bearing. I mentioned plastigage in case I have to fit the ebay conn rod to my crank. I could use pop gauges and mike but i guess plastigage is a kinda "proof" crutch. I haven't quite fuiguered out all those color/size codes yet, but I will.
Thanx, Allan
The question is: The stamped numbers on my conn rod/cap are different than the one I've located on ebay. I haven't found out just what the numbers denote but in my limited knowledge of Jag, they mean something, perhaps the size of the race for the bearing. I mentioned plastigage in case I have to fit the ebay conn rod to my crank. I could use pop gauges and mike but i guess plastigage is a kinda "proof" crutch. I haven't quite fuiguered out all those color/size codes yet, but I will.
Thanx, Allan
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#13
Hey, Allan.
The question is: The stamped numbers on my conn rod/cap are different than the one I've located on ebay. I haven't found out just what the numbers denote but in my limited knowledge of Jag, they mean something, perhaps the size of the race for the bearing. I mentioned plastigage in case I have to fit the ebay conn rod to my crank. I could use pop gauges and mike but i guess plastigage is a kinda "proof" crutch. I haven't quite fuiguered out all those color/size codes yet, but I will.
Thanx, Allan
The question is: The stamped numbers on my conn rod/cap are different than the one I've located on ebay. I haven't found out just what the numbers denote but in my limited knowledge of Jag, they mean something, perhaps the size of the race for the bearing. I mentioned plastigage in case I have to fit the ebay conn rod to my crank. I could use pop gauges and mike but i guess plastigage is a kinda "proof" crutch. I haven't quite fuiguered out all those color/size codes yet, but I will.
Thanx, Allan
#15
No work. I think I let the oil get a little low. (STUPID!!!) My '98 never used a drop between changes. So I assumed........All of a sudden, slight rattle. sounded like an old lifter when they had them but got progressively louder. Tore it down and there it was. Only 1st 1/2 of the journal I "haint never seed nuthin like it".
Steve
Steve
#16
If the acquaintance didn't check the as-installed clearances, that is where he went wrong. As a matter of fact, I can't see how you would check "as-installed" clearances directly with micrometers. You can only measure and extrapolate.
#17
But, that is a production line thing. For a custom build, you would use a inside micrometer in four positions to measure the diameter on the rod and calculate the required shell again.
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