EDIT: Culprit found to be Radiator cap.
http://www.supramania.com/forums/showpost.php?p=652690&postcount=28
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Hey guys. I've been doing a lot of lurking, as with my new work schedule, I haven't had an honest day off in over two weeks- so I have very little time to do much work on the Supra.
I noticed a fairly serious problem the other day that's shown up only recently. After driving the car for an extended period of time, the coolant reservoir tank would start boiling and spitting coolant out the overflow hose. I never once saw the temp gauge needle raise past the half way mark, but this problem was growing to be more and more consistent.
At first, I thought it might be the cheap POS thermostat a friend and I put in a few months back, so I went out and got the best one Kragen stocked and stuffed that in this afternoon, only to find the problem remained.
Here's a link to a video of the problem in question:
http://www.youtube.com/watch?v=yxNSO_oWPQk
In any event, I'm pretty sure this means I've got a Blown Head gasket. I haven't seen any oil in the coolant or vice versa yet- I'm going to drive it up to a friend's place on Wednesday to run a compression test on it, just to be sure.
If it does is in fact turn out to be a BHG, I'll likely stick it in a car port and start the long grueling process of a rebuild over the next 6 months (provided I get some free time away from work).
My question is this: Is there anything else that would cause these symptoms? Is it possible I'm missing something else that could cause this to happen? I'm posting here, already figuring the answer will be a resounding no- but you can't blame a guy for hoping, right?
http://www.supramania.com/forums/showpost.php?p=652690&postcount=28
---------------------------------------------------------
Hey guys. I've been doing a lot of lurking, as with my new work schedule, I haven't had an honest day off in over two weeks- so I have very little time to do much work on the Supra.
I noticed a fairly serious problem the other day that's shown up only recently. After driving the car for an extended period of time, the coolant reservoir tank would start boiling and spitting coolant out the overflow hose. I never once saw the temp gauge needle raise past the half way mark, but this problem was growing to be more and more consistent.
At first, I thought it might be the cheap POS thermostat a friend and I put in a few months back, so I went out and got the best one Kragen stocked and stuffed that in this afternoon, only to find the problem remained.
Here's a link to a video of the problem in question:
http://www.youtube.com/watch?v=yxNSO_oWPQk
In any event, I'm pretty sure this means I've got a Blown Head gasket. I haven't seen any oil in the coolant or vice versa yet- I'm going to drive it up to a friend's place on Wednesday to run a compression test on it, just to be sure.
If it does is in fact turn out to be a BHG, I'll likely stick it in a car port and start the long grueling process of a rebuild over the next 6 months (provided I get some free time away from work).
My question is this: Is there anything else that would cause these symptoms? Is it possible I'm missing something else that could cause this to happen? I'm posting here, already figuring the answer will be a resounding no- but you can't blame a guy for hoping, right?
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