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Old 08-13-2009, 11:21 AM   #1
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Default coolant leak? where?

Ok, so I put in the mbc and turned it up to about 9.5psi and did a little tuning this morning: HOLY WOW this thing loses traction in 1st and 2nd without any effort at all couldnt WOT 3rd due to clutch slipping (haven't replaced it yet). It basically hauls like a raped ape


ANYWHO, on to my problem:
This morning after driving it around normally for a few minutes I pull into the gas station, pop the hood, and notice coolant droplets all over the front of the engine, on the fans, and a few drops on the charge pipes. WTF

I wipe it all off, drive home, pop the hood again and again there are droplets of coolant all over the place. I look underneath, look from the top, sides, look all over and I ABSOLUTELY CAN NOT FIND THE SOURCE!!

Inspected the rad: looks to be in decent shape and no cracks/holes. Weird thing is: the splatter droplets are just random and there is not one place where It looks like a leak/source. Just random coolant in places. Not a lot of it, but enough to get me worried.

Any ideas? Water pump maybe? I checked the rad hoses and both are dry/no leaks.

I'm completely lost
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Old 08-13-2009, 11:52 AM   #2
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What the hell kind of tires are you running that you've got wheelspin in second with a GT25 and a torsen at 9.5 PSI?
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Old 08-13-2009, 11:55 AM   #3
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Quote:
Originally Posted by Joe Perez View Post
What the hell kind of tires are you running that you've got wheelspin in second with a GT25 and a torsen at 9.5 PSI?
+1, I have no traction issues at 16 psi with my 2871.


As for the coolant leak, just keep looking. That's all you can do.
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Old 08-13-2009, 11:57 AM   #4
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Quote:
Originally Posted by Joe Perez View Post
What the hell kind of tires are you running that you've got wheelspin in second with a GT25 and a torsen at 9.5 PSI?
Crappy ones
Goodyear Eagle LS all season 205/55/16 with a treadwear of 360.

My turbo is a bit larger than a standard t25 as well as ball bearing, or so I think.
Specs:
HKS GT2535 - 340 PS Output
COMPRESSOR:
-Wheel- 56 Trim - 51.6 Inducer / 69.0 Major
-Housing- 60 Inlet / 50 Outlet - 0.60 A/R
TURBINE:
-Wheel- 76 Trim - 53.8 Major / 47.0 Exducer
-Housing- GT25/T3 inlets / Outlet specs:
Skyline Type; 0.64 A/R


Any suggestions on my coolant issues? I'm a complete and need your guidance
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Old 08-13-2009, 12:09 PM   #5
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Ok, I feel better now. At 14 PSI I can get a little wheelhop out of my RE-01Rs in first gear after 4,000 RPM or so, but that's it.

[/hijack]

Sucks about your coolant problem. Maybe a UV leak detector?
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Old 08-13-2009, 12:17 PM   #6
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let the car idle. once the system starts to pressurize it should become very evident. I'm guessing pinhole leak in a hose.
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Old 08-13-2009, 12:36 PM   #7
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Sounds like a plan. Will report back. Thanx
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Old 08-13-2009, 01:06 PM   #8
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Not sure, but a crappy rad cap could allow a little over the top.

Took me a long time to find a pin-hole leak in the "oil cooler" water line from the back of the head.... (the heater core that split at the gap.... was another story).

You're probably just going to have to keep looking. Could the hoses from the TB be leaking, and then it's getting thrown around with the belts?

Dave,
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Old 08-17-2009, 12:13 AM   #9
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Ok, so here is what I have so far:
-Its not the radiator cap. I put on a brand new one and it didn't change anything.
-Its not the rad hoses or the rad since I idled it for EVER and the rad/hoses were dry no matter how many times I squeezed it or poked at it.
-When the car runs/idles there is absolutely no coolant ANYWHERE. It is dry everywhere without so much as a single drop of coolant showing or coming from anywhere.

Now check out these pictures (they're shitty quality, sorry)


-The coolant ONLY appears after spirited/high rpm driving. ONLY
I can let it sit there and idle for days and it will not leak.
-The coolant seems to be coming from the engine/timing belt cover. Its not the turbo coolant lines, or anything else. It seems to be coming from behind one of the pulleys. 1st and 3rd picture show it best.

So,


WATER PUMP?
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Old 08-17-2009, 12:36 AM   #10
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Water pump is certainly located in the area you are taking pics.
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Old 08-17-2009, 01:42 AM   #11
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There's the water pump gasket, the shaft seal, the thermostat neck sealed to the head (I believe with an o-ring), all in that area.

I'd say its the seal on the water pump shaft. Its getting out, getting on the pulley, and being flung everywhere. That theory fits, but it sounds strange for a 2000.
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Old 08-17-2009, 02:46 AM   #12
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Yeah it does. Didn't think I'd be touching the water pump at 57k miles only about 300 of which were turbocharged

Well I'll be putting in a new clutch next weekend or the one after, so I guess I'll be doing timing belt + water pump + gaskets along with it
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Old 08-17-2009, 09:41 AM   #13
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Default coolant leak

Had that. Was the thermostat gasket at the stud. Only leaked on the highway. Coolant dripped on the belts and pulley. Threw it everywhere.
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Old 08-17-2009, 09:56 AM   #14
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+1
Check the coolant (ALL) lines in this picture for rupture of bad clamps. When driving hard, pressure is much higher so it's a tiny leak somewhere. Drive it very hard hard hard, then pull over and pop the hood. Should be visible then.
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Old 08-17-2009, 10:14 AM   #15
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I'll say it again:

UV Leak Detector.

Wash down the engine bay real good. Put the magic dye into the cooling system, and then drive the car just long enough to get a tiny bit of coolant pumping out. Park it, and get into CSI mode.


Here's an example of what I'm talking about: Interdynamics UV-1 Professional UV Leak Detector Kits You should be able to get these locally.
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Old 08-17-2009, 10:33 AM   #16
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my guess is that gray silicone hose....

with that amount of spray, you should easily be able to pinpoint the leak at idle.
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Old 08-17-2009, 04:18 PM   #17
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Quote:
Originally Posted by Joe Perez View Post
I'll say it again:

UV Leak Detector.

Wash down the engine bay real good. Put the magic dye into the cooling system, and then drive the car just long enough to get a tiny bit of coolant pumping out. Park it, and get into CSI mode.


Here's an example of what I'm talking about: Interdynamics UV-1 Professional UV Leak Detector Kits You should be able to get these locally.
To be honest I had no Idea stuff like this even existed. I'll try to find some locally. Thanx
Quote:
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my guess is that gray silicone hose....

with that amount of spray, you should easily be able to pinpoint the leak at idle.
Yeah, but believe it or not I idled the car for a good 30 minutes or so, then had my wife get in and rev the **** out of it while I looked around with a super bright light and everything was dry as can be. Then I drive it and go WOT for a few moments, pull over, pop hood = this ****. I'll keep looking and try Joes method though.
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Old 08-17-2009, 04:33 PM   #18
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Quote:
Originally Posted by hx1966 View Post
Had that. Was the thermostat gasket at the stud. Only leaked on the highway. Coolant dripped on the belts and pulley. Threw it everywhere.
This looks promising. Try wrapping the thermostat joint with duct tape, take a quick drive, peel off tape. If wet inside tape, you found your leak. Free and quick check.
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Old 08-17-2009, 04:38 PM   #19
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Doing that /\ in a few hours when I get some free time.
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