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  #21  
Old 11-30-2007, 01:14 PM
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Quote:
Originally Posted by bmartin9122 View Post
As a follow-up, 0.5mm difference is very little. In fact, 1mm is roughly the thickness of a dime. So imagine 1/4 the thickness of a dime added to the outside edge of the thermostat. It is just not very much, and it is readily accommodated by the rubber gasket without any threat of damage.

Of course, some will claim this is a problem, so grind away if you must.
That .5mm difference may not seem like a lot but it's certainly enough to tear the flimsy rubber gasket (it did on mine) which is enough to cause a leak. Thankfully mine let go in my own driveway (after a 2 hr drive believe it or not) as evidenced by the significant coolant trail left behind. Had it burst on the road there's a very good chance I wouldn't have noticed until damage to the cylinder heads due to overheating occured.

Good thread, good pics, good info. Just take the extra time to do it right, that's all.

Last edited by GotStroke?; 11-30-2007 at 01:29 PM.
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  #22  
Old 11-30-2007, 01:16 PM
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Just to be clear on this, if we were to grind we would be grinding down the diameter of the T stat not the seat where it sits?
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  #23  
Old 11-30-2007, 01:17 PM
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Originally Posted by guyrobert View Post
Just to be clear on this, if we were to grind we would be grinding down the diameter of the T stat not the seat where it sits?
The outside circumference of the T-stat itself, where the gasket seats against the T-stat.
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  #24  
Old 11-30-2007, 02:38 PM
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Quote:
Originally Posted by GotStroke? View Post
That .5mm difference may not seem like a lot but it's certainly enough to tear the flimsy rubber gasket (it did on mine) which is enough to cause a leak. Thankfully mine let go in my own driveway (after a 2 hr drive believe it or not) as evidenced by the significant coolant trail left behind. Had it burst on the road there's a very good chance I wouldn't have noticed until damage to the cylinder heads due to overheating occured.

Good thread, good pics, good info. Just take the extra time to do it right, that's all.
I am sorry to hear of your bad experience. I can honestly say this is the first time I've heard of that happening. How long did it last before failure?

Like I mentioned before, I had no problems with my Mag in the 2 years I ran like this. In fact, I even swapped the t-stat twice - the first time with a 170 then later with a 180. The gasket looked fine with no apparent damage.
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  #25  
Old 11-30-2007, 02:58 PM
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Quote:
Originally Posted by bmartin9122 View Post
I am sorry to hear of your bad experience. I can honestly say this is the first time I've heard of that happening. How long did it last before failure?

Like I mentioned before, I had no problems with my Mag in the 2 years I ran like this. In fact, I even swapped the t-stat twice - the first time with a 170 then later with a 180. The gasket looked fine with no apparent damage.
Around 4-5 mos. before letting go. No condolences necessary, it was a learning experience.
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  #26  
Old 11-30-2007, 03:45 PM
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I've cleaned up the thread a bit more and added GotStroke?'s comments.
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Old 12-05-2007, 11:02 AM
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Quote:
Originally Posted by bmartin9122 View Post
I've cleaned up the thread a bit more and added GotStroke?'s comments.

Awesome pics and write up and follow up comments for us wrench noobs. Thanks bmartin and GotStroke.
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  #28  
Old 12-05-2007, 11:14 AM
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I did mine this morning before going to work.

Found the black rubber hanging off the old thermostat, I am very glad I caught it before it broke loose.

Used sand paper to grind down the new tstat in about 5 minutes. It was not going in without some reduction...

Thanks again for the great writeup...
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  #29  
Old 12-05-2007, 11:46 AM
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Bmartin, I am on my work computer and can't see your pictures, about how much coolant comes out, so what size of a bag do I need. After work I am going straight to the shop to put my CAI on and want to do this at the same time. If I lose that fluid, will I have to get some more right away????
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  #30  
Old 12-05-2007, 11:59 AM
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Sorry.... a one-gallon HEAVY DUTY freezer bag holds the spillage nicely. It will only get about half full, and the extra bag thickness will thwart most attempts by sharp edges to rip it open.

The overflow reservoir has plenty enough extra to tolerate spilling all of it without causing any problems.

Thanks for your comments - I've added a bit more clarification to the step-by-step.

Last edited by bmartin9122; 12-05-2007 at 12:06 PM.
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