Radiator stop leak
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Cargo Master
Joined: Sep 2004
Posts: 3,430
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From: NH
Radiator stop leak
I am in the middle of changing a timing chain on a Toyta 4 cylinder and when I took the timing cover off I saw a bunch of white chunky stuff in the water passages.
Is my guess correct in thinking it is radiator stop leak?
The radiator is poped and took out the head and head gasket when it went(guy kept driving it after rad poped).
I cleaned out the timing cover and all the stuff I could see in the block with the timing cover off. What else should I check? Should I change the thermostat or should it be fine?
Could I just get the truck running and after it comes up to temp let it idle a few minutes and drain radiator(hot) hoping to get most of the stop leak out?
And what about flushing the cooling system? I have never done that before and this looks like a good candidate to practice on. I have at least 2 other cars overdue for coolant flushes as well. Could I change from orange(in gas car) to green coolant after a flush? I know you can't mix them.
Thank you
Is my guess correct in thinking it is radiator stop leak?
The radiator is poped and took out the head and head gasket when it went(guy kept driving it after rad poped).
I cleaned out the timing cover and all the stuff I could see in the block with the timing cover off. What else should I check? Should I change the thermostat or should it be fine?
Could I just get the truck running and after it comes up to temp let it idle a few minutes and drain radiator(hot) hoping to get most of the stop leak out?
And what about flushing the cooling system? I have never done that before and this looks like a good candidate to practice on. I have at least 2 other cars overdue for coolant flushes as well. Could I change from orange(in gas car) to green coolant after a flush? I know you can't mix them.
Thank you
Senior User
Joined: Sep 2003
Posts: 452
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If it overheated to the point it damaged the radiator, head, and head gasket the white chunky stuff you see is probably oil. Keep in mind that if you had any leakage the other way (coolant into oil) the bearings are probably shot.
Post Fiend
Joined: Feb 2003
Posts: 6,940
Likes: 2
From: Eastern WA
That white chunky stuff could be minerals from the water used when mixing the coolant solution. Yes, replace the thermostat since they are not only cheap but can get screwed up when overheated. I'd also backflush the heater core while you have the system drained, and flush the engine as best as you can before putting the radiator hoses back on. I assume you replaced the radiator.
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Cargo Master
Joined: Sep 2004
Posts: 3,430
Likes: 2
From: NH
Radiator is bran new sitting in garage waiting to be put back on. Hopefully I'll be gettign the new head put on tomorrow.
how do I flush the system? Garden hose???? and backflushing the heater core? Do I take it out to do that?
how do I flush the system? Garden hose???? and backflushing the heater core? Do I take it out to do that?
Post Fiend
Joined: Feb 2003
Posts: 6,940
Likes: 2
From: Eastern WA
I'd garden hose the block and heater core to death until no more debris comes out, then try a little longer for good measure. No need to take out the heater core; just remove the hoses and flush/backflush repeatedly. For the first few days, I'd run it on straight water, watching to see if debris comes loose. Flush and repeat until no more debris is breaking loose. I'd also use a bottle of super flush on the first round too. When it's finally clean, I'd add antifreeze/water.
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