2 C4 IMS bearing
06-07-2020, 09:40 AM
#46
Rennlist Member
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06-07-2020, 09:56 AM
#47
Racer
The problem is that the heavier grease is displaced by lighter viscosity oil that does not circulate freely in and out of the bearing; it can only seep through the seal. The shaft itself is basically a light gauge hollow tube, and I doubt it can absorb much heat from the bearing. You really need the sealed-in grease or circulating oil; semi-sealed oil is not adequate.
Wheel bearings heat up, but the knuckle they live in is heavy cast steel that is a far better heat sync than the IMS. Also, wheel bearing do not turn the kinds of RPM that the IMSB sees.
Wheel bearings heat up, but the knuckle they live in is heavy cast steel that is a far better heat sync than the IMS. Also, wheel bearing do not turn the kinds of RPM that the IMSB sees.
If we take my laptop, strap the IMS shaft to the CPU as heat sink and then submerge it all into an oil bath. Then it would be rather overkill cooling. Same as the IMS bearing.
If the bearing is in a mode of failing, then yes, the heat goes up drastically. But, look at pictures of failed bearings, they are still not overheated.
06-07-2020, 11:09 AM
#48
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This is a disaster. Shop is responsible. Have them drop the engine and put it on a pallet. Ship it to Flat Six for a rebuild. Take out a second mortgage on your house, you will need it, unless you have a spare 15-20K in your bank account. There really is no other remedy since they attempted to extract the bearing which cannot be extracted. Boy what a screw up! If it were me, I would already have the car out of that shop and would have it shipped directly to Flat Six. Please listen to the experts:
I've read through the multitude of replies and I must add that the shop already compromised the original bearing by pulling on the center race which loads up the ***** to the outer race. To top that off, pushing on the center race will just make this worse. The forces applied to the baring cause brinelling which results in permanent indentations in the races caused by the forced transferred through the *****. Shop messed up royally. Engine disassembly is the only correct course of action.
__________________
Charles Navarro
President, LN Engineering and Bilt Racing Service
http://www.LNengineering.com
Home of Nickies Cylinders, IMS Retrofit, and IMS Solution
I've read through the multitude of replies and I must add that the shop already compromised the original bearing by pulling on the center race which loads up the ***** to the outer race. To top that off, pushing on the center race will just make this worse. The forces applied to the baring cause brinelling which results in permanent indentations in the races caused by the forced transferred through the *****. Shop messed up royally. Engine disassembly is the only correct course of action.
__________________
Charles Navarro
President, LN Engineering and Bilt Racing Service
http://www.LNengineering.com
Home of Nickies Cylinders, IMS Retrofit, and IMS Solution
The following 3 users liked this post by DBJoe996:
06-07-2020, 10:01 PM
#49
Rennlist Member
06-07-2020, 10:05 PM
#50
Rennlist Member
06-08-2020, 01:39 PM
#51
Rennlist Member
I've read through the multitude of replies and I must add that the shop already compromised the original bearing by pulling on the center race which loads up the ***** to the outer race. To top that off, pushing on the center race will just make this worse. The forces applied to the baring cause brinelling which results in permanent indentations in the races caused by the forced transferred through the *****. Shop messed up royally. Engine disassembly is the only correct course of action.
You had a perfectly fine motor and your mechanic ruined it...So sorry you have to go through this.
06-08-2020, 01:48 PM
#52
RL Community Team
Rennlist Member
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If Charles says it needs to be replaced, then it needs to be replaced.
The following 3 users liked this post by TexSquirrel:
06-08-2020, 08:37 PM
#55
Rennlist Member
06-08-2020, 08:48 PM
#57
Rennlist Member
An extreme example of a trunk job would be a car that comes into the shop in pieces, with the engine already disassembled in boxes on a pallet, but sometimes in the trunk or in the interior, hence where the name came from. Not something I coined :-)
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Scott at Team Harco (06-09-2020)
06-08-2020, 08:52 PM
#58
Burning Brakes
Have the shop buy it from you for what is was worth before they fuched it up. A full rebuild is what, $25k or so?
06-08-2020, 09:04 PM
#59
Instructor
Comment on the bearing seal. My car also has an 05 replacement engine with the large bearing, discovered the large bearing while replacing the clutch and RMS.
Following the recommendations here, I removed the real seal of the bearing. The way I did this was by very carefully inserting a dentist pick and pulling on the seal. When it came off it sounded like when you open a soda can, so it had pressure, either high or low but its internal pressure was different from the outside. The inside of the bearing was very dry, it had no oil and no grease whatsoever. Engine had around 45k miles at the time.
Following the recommendations here, I removed the real seal of the bearing. The way I did this was by very carefully inserting a dentist pick and pulling on the seal. When it came off it sounded like when you open a soda can, so it had pressure, either high or low but its internal pressure was different from the outside. The inside of the bearing was very dry, it had no oil and no grease whatsoever. Engine had around 45k miles at the time.
06-08-2020, 09:23 PM
#60
RL Community Team
Rennlist Member
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I worked for a shop back in the 90s that took in a couple of trunk jobs.
They never were warrantied, and they never turned out well.
Literally the parts were unmarked in boxes.
The customers had torn down the engines themselves and dumped the parts in boxes.
These were the same people who didn’t want to buy any new parts.
I would NEVER take on a trunk job.
This one at least is not disassembled yet!
They never were warrantied, and they never turned out well.
Literally the parts were unmarked in boxes.
The customers had torn down the engines themselves and dumped the parts in boxes.
These were the same people who didn’t want to buy any new parts.
I would NEVER take on a trunk job.
This one at least is not disassembled yet!