My turbo is in for a rebuild and it appears the rear bearings have overheated. I had an incident early on where the crank angle sensor was picking up an incorrect signal and throwing out my timing resulting in a red hot manifold and turbo. I'm guessing this is when I did the damage.

BUT, my water supply for cooling is a reroute of the water supply to the stock oil warmer/cooler which I have removed. Is this source adequate? Is the water flowing all the time or only once the thermostat opens?

I'm spending $1375 rebuilding my turbo and would hate for this to happen again if it wasn't due to the timing issue.

 

holy shit. 1375 could just buy you a brand new turbo... what are you rebuilding?

i am pretty sure the coolant lines running around the oil cooler stay filled with liquid at all times.

i would think a red hot manifold would cause some issues - did you ever get that sorted out?

you could also check for signs of leaks anywhere, although coolant doesnt really always leave too many signs behind...

 

Talk about a spendy turbo rebuild. What kind is it?

 

you could always run the water line off the top and bottom of the radiator... i just copied mine off inline's car

 

I've posted this before, this is what I've done for coolant routing on a tracked turbo car:




1. Coolant flows to the turbo from the outlet on the side of the block that used to feed the sandwich plate for the stock oil "cooler" (although it probably does more to warm the oil on cold days than cool the oil once the car is running).



2. Then, I plugged the hard metal line that runs across the front of the block, as that was the old passage by which the coolant that flowed through the oil cooler and go back to the block. It enters the block near the thermostat housing (which is why I argue it's more of an oil heater than cooler).



3. I then routed the return line from the turbo to the upper radiator hose using a t-fitting.

 

Slow, I know we've talked about this before, but why did you choose to return the coolant via the top radiator hose and not the return for the sandwich block?

As for the cost or repair, keep in mind that is in pacific pesos so equates to about $USD825. And new turbo is $400 more.

 

The upper hose is routing "hotter" coolant to the radiator. The "cooled" coolant is from the lower hose.

 

Slows2k - You got any pics? I can see the routing of the coolant supply from the sandwich supply to the turbo. And plugging the hard line on the front of the block (where the coolant line wraps around the corner).

I do not understand the following:

1) If you are re-directing the coolant supply from the oil cooler to the turbo, and are returning that coolant to the top radiator hose, how is the oil cooler getting coolant?

2) The line that runs out of the oil cooler, and around the block, where does that go, if the hard line is plugged?

Here is a pic of how I have it setup:

Coolant supply for the oil cooler sandwich is re-routed to the turbo. Turbo return line goes into oil cooler sandwich supply side. Rest of the lines are like OEM (oil cooler return line crosses the corner of the block into the hard line).

How is you setup different? As far as I can tell from your description, the supply is the same, but the turbo drain line is going directly to the top radiator hose. This does not explain how the oil cooler is getting its coolant... And if you cap the hard line, where does the oil cooler sandwich coolant return?

John

 

John, I'm going to assume he has a new oil cooler setup and therefore eliminated the stock cooler setup.

As for your setup, I would consider rerouting it. You're running coolant through the turbo first heating it up, and then through the oil cooler. So now you have hotter coolant going through the oil cooler than originally which will compromise the ability of the oil cooler to reduce the temps of the oil.

Maybe you can T-off from the line feeding the oil cooler to feed the turbo, so it feeds both at the same time. Then T the turbo drain into the oil cooler drain. Just a thought!

 

^ Yeah, I have it setup like AUS2000...

I am not at a really high level of boost, so my turbine does not get as hot as some of these other guys' setups. 6.5-7# peak boost now. I run around mostly off-boost, as it is my daily driver... I put the kit together with the point of not being in boost all the time, to make is DD friendly.

It will be changing this upcoming weekend, though, when I swap in a Laskey Racing engine... Just trying to research better ways to do the coolant line routing. I will ask my mechanic what he thinks, when we get it done this weekend...

I need to keep the OEM radiator (due to thickness constraints of the IC pipe routing), and I don't think you can weld any bungs onto the OEM one...

I was thinking about putting a T-fitting on the oil cooler line, and returning it to somewhere else, but isn't the top radiator hose WAY above the level of most turbo coolant drains (its good bit above mine)? Not sure how the coolant would return once the car/water pump is shut-off.

Also, would T'ing off of the coolant supply to the oil cooler provide sufficient flow to both (turbo and cooler)? Or would it end up starving one, or even both with reduced flow?

Thanks!

John