S400 Bit the dust tonite

[othrgrl]

Ive only heard ATS claim that. One company isnt going to convince me. Turbos dont need a garden hose of oil.

As has been said if the cam bearing spins it will completely cut off oil supply. Turbo's don't NEED a garden hose but on a journal bearing turbo it surely won't hurt anything either. I get oil from the rail in the side of the block.

 

[durallymax]

As has been said if the cam gear spins it will completely cut off oil supply. Turbo's don't NEED a garden hose but on a journal bearing turbo it surely won't hurt anything either. I get oil from the rail in the side of the block.

Ya i forgot about the cam bearing issue.

I might tap mine in over there like ATS does.

 

[durallymax]

If you keep trying to run 4th gear and bog it down below 3000rpm like that, bent stock rods are going to be the norm. To keep them striaght you need to keep as far a way from peak torque as you can. If you want to keep hanging 4th rods should be on your short list.

Ive only run it 3 times this year. Once just to see if I could do it then another time when i knew i could pull it off, and then on this track because its usually a great track for speed.

 

[KEVINL]

How often does this cam bearing issue actually happen?


Does it wipe out the cam to?


It seems like there are alot of trucks running from 150,000-400,0000 miles using the stock oiling loaction

 

[duramax215]

sorry to hear this vinny!!! i hope it's back up soon.. but i'd be down for a bunch of d-maxs and union grove.

 

[Gmclbz]

If the camshaft bearing spins on the stock oil feed which it is known to do, poof there goes the oil supply. My oil feed comes off the oil filter housing so I am guaranteed to never lose oil supply unless the entire system loses oil pressure.

I had heard that but haven't seen anyone post about it so didn't think it was a real issue...

 

[Brayden]

S472 1.00 A/R

I have an air shutoff to prevent runaways. Everybody said you dont need it blah blah but this is the reason i have it.

The oil comes off the stock location. The blue smoke at the end wasnt normal So it must have been leaking some oil in there somehow but idk how it wouldve without running away.

There's your problem... Feeding from the factory location.

Call me in the AM and I can have a bearing kit for the S400 out tomorrow. You'll also want a remote oil feed kit that I have in stock as well. It uses -4 AN Line from the oil galley on the side of the block. It comes with a blockoff for the factory location.

If you're in a hurry to get it back running again that is

 

[durallymax]

There's your problem... Feeding from the factory location.

Call me in the AM and I can have a bearing kit for the S400 out tomorrow. You'll also want a remote oil feed kit that I have in stock as well. It uses -4 AN Line from the oil galley on the side of the block. It comes with a blockoff for the factory location.

If you're in a hurry to get it back running again that is

Thanks brayden but ive got all winter. I think im just going to go ahead and build the motor especially if it did spin the bearing. Havent even looked yet. Plus the compressor wheel and housing is chewed up. Havent see the exhaust side yet.

Tim at SJD is going to find out which injectors are cracked for me so i dont have to replace all 8, then ill most likely send them out to go bigger a touch.

Im thinking what happened was the cracked injectors diluted the oil possibly causing the cam to spin the bearing cutting off oil to the turbo causing it to fail. Or the diluted oil just outright caused the turbo to fail and the bearing never spun.

 

[othrgrl]

How often does this cam bearing issue actually happen?


Does it wipe out the cam to?


It seems like there are alot of trucks running from 150,000-400,0000 miles using the stock oiling loaction

The higher the power (and faster reving) the motor is the more likely it will be to spin a cam bearing - so the stock/fairly stock motors that aren't raced and pulled aren't going to be near as likely to have the problem. Cam bearings are one piece, not split like rod and main bearings so it won't typically wreck a cam like you might expect when you hear the words "spun a bearing". But it will cut off the oil supply from that cam journal and would eventually heat and score the cam and bearing.

 

[durallymax]

update

cam bearing never spun.

3 injector nozzles were bad and three other injectors had cracked bodies

The turbo was pretty much trashed, its rebuilt now

the oil pump was shot as well, it just simply didnt spin very freely