04-17-2014, 11:19 AM | #26 |
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Re: Overheating issue
Sure about that?
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04-17-2014, 07:01 PM | #27 |
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Re: Overheating issue
I disagree with your statment. My lower radiator hose has wire running through it to keep it from colapsing, from that "water sucker" pumping coolant through the engine.
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04-17-2014, 10:57 PM | #28 |
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Re: Overheating issue
You're wrong! And it's simple to prove yourself wrong by removing your radiator cap, start the engine and let it warm up so the t-stat opens, and you will clearly see the direction of flow. As mentioned in this thread, there's a reason the lower hose has a coil wire inside it...and it's not there to add minerals to your coolant
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04-17-2014, 11:39 PM | #29 |
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Re: Overheating issue
The top hose should be empty when the thermostat is closed. When the thermostat OPENS, the pressure maintained/created by the water pump forces the heated coolant to pass by the thermostat (via engine) and enters into the radiator through the top hose -thereby causing the cooled coolant previously in the radiator to enter the engine via the bottom hose. When that cool coolant enters the engine, the thermostat recognizes and closes - allowing the newly heated coolant in the radiator to cool. Rinse, repeat.
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04-18-2014, 08:53 AM | #30 |
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Re: Overheating issue
Picture is worth a thousand words , YOU NEED A SHROUD , will solve your problem
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04-18-2014, 10:29 AM | #31 |
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Re: Overheating issue
That's it... I am calling my Dad...
I wonder what else he has taught me that is wrong... hahaha myyamr7 & litew8... thank you for clarifying/correcting me... that makes perfect sense. sjburk, sorry if I caused a lot of confusion.
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04-18-2014, 10:34 AM | #32 |
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Re: Overheating issue
This last quote is incorrect. The picture with the arrows was correct.
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04-18-2014, 10:42 AM | #33 |
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Re: Overheating issue
Ive got similar problem, been told my alternator isn't providing enough power to my electric fan, and I don't have a shroud. new 4 core hoses, thermostats, caps,
only thing I haven't done is a heat gun. bout ready to let the shop tinker with it as I'm tired of driving with the heater on and its 115F out. (just got an original rear slider window, talk about a/c 8D ) |
04-18-2014, 10:49 AM | #34 | |
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Re: Overheating issue
Quote:
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04-18-2014, 02:21 PM | #35 |
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Re: Overheating issue
Not sure it's the root cause but should definitely help.
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04-18-2014, 02:23 PM | #36 | |
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Re: Overheating issue
Quote:
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project: "my happy mess" Last edited by litew8; 04-18-2014 at 02:30 PM. |
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04-18-2014, 02:39 PM | #37 | |
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Re: Overheating issue
Quote:
Jeff
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04-18-2014, 08:43 PM | #38 |
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Re: Overheating issue
The comment about the shroud is partly true, but a 6 cylinder shroud is almost more of a fan protector than a shroud, it's not going to help a lot. You can see the black shroud on top of the radiator in this picture.
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04-18-2014, 09:35 PM | #39 |
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Re: Overheating issue
Interesting
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04-19-2014, 02:04 AM | #40 |
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Re: Overheating issue
If we can't laugh at ourselves, who can we laugh at. all good
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04-19-2014, 06:57 PM | #41 |
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Re: Overheating issue
I've had good luck in the past with drilling the t-stat base. 1/8 hole seems to allow the air to pass back the to radiator without allowing too much coolant to pass. . Any bigger than 1/8 I think would defeat the purpose of the t-stat.
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04-19-2014, 08:49 PM | #42 |
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Re: Overheating issue
I had the same problem as described at the beginning of this thread on my '66 250 CID: first cycle of the thermostat would peg the gauge. It was very concerning. Replaced every thing multiple times, nothing fixed it. Even thought of air bubble/pocket. Nothing worked until I did exactly as Curtm220 mentioned..., 1/8 hole in base of thermostat. That was 6 years ago and never a problem again. BTW, 6 cylinders didn't come with a shroud - no such thing.
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04-19-2014, 09:01 PM | #43 |
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Re: Overheating issue
No such thing because they weren't invented yet? Or just because there isn't enough heat generated to justify the need?
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04-19-2014, 09:07 PM | #44 |
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Re: Overheating issue
I doubt that,since all 67-72 L6s came from GM without a shroud.
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04-19-2014, 10:00 PM | #45 |
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Re: Overheating issue
Here's one on 60-66's, but he's got A/C and it's a 66. This is what I imagined it might look like, but I guess it was only for trucks (66 only?) equipped with a/c. Strange GM would eliminate the shroud, it looks dangerous without.
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04-19-2014, 10:05 PM | #46 |
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Re: Overheating issue
If the OP is still following along, I wonder if the problem is due to having replaced the thin two core radiator with a thicker 3 core radiator, and, not having a shroud.
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04-19-2014, 10:23 PM | #47 |
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Re: Overheating issue
There is a metal finger shield mounted
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04-20-2014, 04:54 PM | #48 |
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Re: Overheating issue
I was also thinking it may have something to do with that, I still have my old radiator and ive been considering having it restored my grandfather says he knows a guy and he will ask soon. And about that drilling a hole in tstat, can i see a pic of exactly where you drilled the hole?
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04-20-2014, 09:28 PM | #49 | |
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Re: Overheating issue
Quote:
Google "drilled thermostat" and look at the images tab. Many thermostats now come new with a relief machined into the base to remedy the exact problem you're describing.
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04-20-2014, 09:52 PM | #50 |
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Re: Overheating issue
Wholly thermostat Batman! I wonder why the L6s that never had the drilled thermostat never had this issue all those years
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