oh no, not another Vee coolant drip thread! - Page 2 - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
DL1000 from 2002-2012 DL1000 from 2002-2012 (K2-L2)

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post #11 of 27 Old 04-15-2019, 07:58 PM Thread Starter
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Since the O-rings are down near the cylinder heads but I was seeing drips from the thermostat housing, I'm guessing it was the thermostat that was leaking.

Got the T-stat swapped yesterday. The old thermostat looked fine. Its rubber gasket was still pliable, and looked just as good as the new one. Dunno how it was leaking.

Went for a half-hour or so test ride yesterday, and to work today, with no coolant drips so far. But that doesn't mean much - it was an intermittent leak anyway.
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post #12 of 27 Old 04-28-2019, 01:07 PM Thread Starter
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Nearly bi-weekly update: Looks like a new thermostat fixed the drip. Have been on long rides, lots of short rides, several in between rides, no more drips.

I still don't understand it. Old thermostat looked fine; the rubber was in great shape. But there you are.
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post #13 of 27 Old 04-30-2019, 12:12 AM
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I'll keep my fingers crossed for you.
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DL1000K6 Two wheels good; four wheels bad.
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post #14 of 27 Old 05-21-2019, 09:51 AM Thread Starter
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Nevermind, damned thing STILL drips occasionally.

It took a while to work out that it was happening at all. Until last weekend, I never caught it dripping. I'd just find a few white streaks (what evaporated coolant leaves behind) along the top front surface of the stator side of the engine, exactly where you'd expect drips from the thermostat housing to go.

I've tightened the thermostat housing bolts as much as I dare. I really really really do not want to crack the housing. The bolts have blue thread locker on them so they should stay put.

This is so incredibly frustrating. I don't want to have to top off coolant every month, & feel obligated to take extra coolant along on trips. At this point I've replaced all the cooling system rubber, save for the cylinder head O-rings and water pump area (and I'm not getting any leaks from there).

If I still get drips would it be pointless to place a bead of RTV gasket maker along the bottom seam of the thermostat housing? I suppose that might simply redirect the leaking to the top of the housing, but I'm out of answers at this point.

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post #15 of 27 Old 05-21-2019, 12:52 PM
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I guess it's time to do the O-rings. Perhaps it just looks like the thermostat is the source.

DL1000K6 Two wheels good; four wheels bad.
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post #16 of 27 Old 05-22-2019, 08:51 PM Thread Starter
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Before, it looked like I wasn't getting any leaks, but the working theory now is that I get a drippy thermostat housing until the engine warms up sufficiently.

I went for a long-ish ride over the weekend & got home with no evidence of leakage.

T-stat housing bolt torque checked. Service manual calls for only 7.0 lb-ft which is basically "hand-tight."

If the T-stat housing only seals properly once the engine is hot and stays there, that would account for the dripping I've been seeing on more recent, very short rides, and the lack of evidence of leakage after longer rides.

I'm sick of dealing with this, so I've put a bead of RTV (Permatex Optimum Grey) on the seam of the thermostat housing. Giving it a full 24 hours to cure before I ride again. We'll see whether it does anything.

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post #17 of 27 Old 05-26-2019, 01:05 PM
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Any update on this? I think I have the same issue, and I'm curious to see if your solution worked.

Thanks!
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post #18 of 27 Old 05-26-2019, 01:18 PM Thread Starter
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No dripping seen after two short rides (<5 miles each). I think the RTV gasket maker did the trick. Have not been riding much the last week, but will be going on a long-ish ride this afternoon.

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post #19 of 27 Old 05-26-2019, 01:27 PM
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Thanks for the update. Have a great ride, and please update after your ride!
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post #20 of 27 Old 05-26-2019, 08:14 PM Thread Starter
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I'm reluctant to say "it's fixed" given the prior experience, but it hasn't dripped again so far. Did not smell any hot coolant during today's ~4 hours of riding, nor did I observe any dripping from the usual location.

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