spun a bearing

[spazz33]

when i took apart my engine the front bearing behind the pully was seized up and spinning with the crank. before i get a new bearing and fix that problem, i wanna know is there a reason y it spun or is it just happens ? so i can fix that problem and hopefully dont have to do this again
-thanks

[busdaddy]

You'll need alot more than just a new bearing, have the case and crank measured as the odds are good one or both will need resizing.
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Rust NEVER sleeps and stock never goes out of style.

Wanted, 68-73 westy OG plaid curtains, singles OK.

[Desertbusman]

Evidently you'll need another main bearing dowel to replace the one that evidently was missing.
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The best thing that anyone can do for their Bay is get the Volkswagen of America Official Service Manual published by Robert Bentley. Without it the bus is pretty much doomed.

[spazz33]

the dowel pin was still in there and i just rebuilt the engine prior to it happening it maybe had less then 25 miles on it when it spun out. there doesnt seem to be an y damage to the case or crank the bearing looks like it molded to a oval and spun breaking a lil off the dowel. shouldnt the little hole on the bearing be able to blow through?

[spazz33]

spoke to soon i went to look at the dowel pin hole on the case and sure enought its now a oval. need a new case?

[SGKent]

no, It should capture the dowel and encase it so it can't drift into the crank.

You need to have your case checked and probably alignbored. The crank will need to be turned. If really bad both may need replacing.
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Steve aka Merlin the Wrench

formerly Steve's Racing and Engine Blueprinting. Wrenching since 1967.

bdamico on GF wrote

[Wildthings]

Did you have the case checked before you put it together and make sure that that it wasn't resized for oversize bearings? If you case had previously been bored and you installed standard bearings, they would fit loosely and soon spin.

[bigbore]

If it was a fresh rebuild and this happened you may have put the bearing in wrong. It can be installed wrong by putting the pin in wrong spot on that bearing so no oil gets to the hole and sezed on the crank. I have seen it happen there is a spot it will go and its wrong. Most likely you will need to linebore the block.

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where its cold and snowy

[spazz33]

everything was put in right. it was a defective bearing the oil hole on the bearing wasnt drilled all the way through so no oil was going to the crank thus spun. kinda makes me mad cuz i spent over a week rebuilding it and cleaning every little part on the engine and repainting it. than a defective part ruins it all

[Amskeptic]

[bigbore]

Iam paranoid and I miss very little but it comes at a cost like I don't get paid for the time Iam paranoid and look over things time and time again to make sure I don't have a come back. I can't aford them so I spend too much time making sure I didnt miss anything but don't get paid for extra time for it but I don't have mad customer's as a result and I have very loyal customer's. My wife dosen't under stand why I can't paid for all that extra time I spend maybe I should sometime's but with all the screwed parts out there even when you think you bought name brand and the best parts then BAM it gets you.
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where its cold and snowy

[Amskeptic]

There is a front-to-back orientation with those #4 bearings also.
That can wreak havoc with lubrication as well.
Colin
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[Desertbusman]

Let's see some pics of that bearing
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The best thing that anyone can do for their Bay is get the Volkswagen of America Official Service Manual published by Robert Bentley. Without it the bus is pretty much doomed.

[SGKent]

[spazz33]

ill post pics in one hot second

[spazz33]

theres the input oil hole




and no out put oil port

[bigbore]

Do you happened to know the brand?
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where its cold and snowy

[Jake Raby]

Ummn, these are factory defect bearings! We noted this during a build 6 months ago and pulled EVERY bearing off our shelves and checked them.

Since then we have checked every set and have only found one more that has had the issue. We noted this because we use the same parts that we sell, no one else has noted this to date, except this failure and one 35 year veteran who should have retired because he became totally complacent and cost someone a lot of money.

I started to make a post on my forums about it, but we weren't concerned because we recalled all the bearings we'd sold and made sure they were good.

I have extensive pictures of these issues on my server, maybe I'll make a post about it.

What has occurred with these bearings is they have been misboxed. Type 1 engines use a single oil passage in the #4 bearing on the 3-4 case half. The Type 4 engine oils the #4 bearing from the opposite case half. due to this the #4 bearing in a TIV engine has a second oil passage and that's the ONLY thing that separates it from a Type 1 bearing. To be expected, because they'd probably never assembled a TIV engine in their life and were probably walking around in a warehouse listening to their damn Ipod and didn't give a damn!

The jackass at the factory gave you a bearing that should have been packaged in a Type 1 bearing set. The person that sold you the bearings never looked at them prior to selling them to you, or they didn't know the difference or the fact that the two bearings have certain characteristics. So much for quality assurance.

Sometimes that cheaper price really gets expensive...

That sucks.. Been there.

BTW_ thats not an oil output port thats missing, its the port that charges the bearing with oil in the TIV application.. The #4 bearing is universal between a TI and TIV except for this one characteristic. With that passage missing the #4 bearing in a TIV application gets ZERO oil.

The last sets we saw that were AFU were GERMAN Kolbenschmidt! Welcome to the world of impossibly shitty parts...
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Jake Raby
Raby Engine Development
www.rabyenginedevelopment.com
"I've never given anyone Hell, I just told them the truth and they thought it was Hell"

[bigbore]

say Jake I saw a photo of one of your type2 bus set up and it has CIS injection. I saw that and said to my self thats the shit! is there a thread on that setup?
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where its cold and snowy

[Jake Raby]