2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Weird overheating

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Old Nov 26, 2005 | 02:36 PM
  #1  
Kenteth's Avatar
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From: Rapid City, SD
Weird overheating

It all started when we installed an electric can. It became an easy turn off while working in the engine bay, just remove it and reinstall later. Well, I reinstalled it one of those times and forgot to hook the power supply back up to it, anyhow, yeah the car overheated while idling in the driveway. We let it cool down and the car seemed fine after that.

Well after installing new motor mounts today, i took the car out for a spirited drive. I noticied it was missing often, but all guages reported ok-- no problems with heat, says the two temp guages.

As I pull into the driveway, I see a bit of steam coming from the engine bay, I knew at that point it was heat causing the misses. But both stats still reported being at normal temp.

Only thing I can think of is a bad coolant/water mix.

The coolant was being spit out the overflow hose the overflow tank. It had a bit of frothness to it, but probably because it had been boiling for a bit.

I'm not in a position to rebuilt yet, but its been on the todo list for some time.

Suggestions?
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Old Nov 26, 2005 | 06:03 PM
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From: Mont Alto, PA
Originally Posted by Kenteth
It all started when we installed an electric can. It became an easy turn off while working in the engine bay, just remove it and reinstall later. Well, I reinstalled it one of those times and forgot to hook the power supply back up to it, anyhow, yeah the car overheated while idling in the driveway. We let it cool down and the car seemed fine after that.

Well after installing new motor mounts today, i took the car out for a spirited drive. I noticied it was missing often, but all guages reported ok-- no problems with heat, says the two temp guages.

As I pull into the driveway, I see a bit of steam coming from the engine bay, I knew at that point it was heat causing the misses. But both stats still reported being at normal temp.

Only thing I can think of is a bad coolant/water mix.

The coolant was being spit out the overflow hose the overflow tank. It had a bit of frothness to it, but probably because it had been boiling for a bit.

I'm not in a position to rebuilt yet, but its been on the todo list for some time.

Suggestions?
If it was "boiling" you should have seen an indication of that in your water temp gauge. So, I would suggest you check for a blown coolant seal in the engine. Start the engine cold and remove the radiator cap, rev the engine and see if you get bubbling. If you do, there's a good chance a seal is blown.

As I'm sure you know, overheating one of these engine can kill it pretty quick.
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Old Nov 26, 2005 | 10:22 PM
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From: Rapid City, SD
Originally Posted by Go48
If it was "boiling" you should have seen an indication of that in your water temp gauge. So, I would suggest you check for a blown coolant seal in the engine. Start the engine cold and remove the radiator cap, rev the engine and see if you get bubbling. If you do, there's a good chance a seal is blown.

As I'm sure you know, overheating one of these engine can kill it pretty quick.
Mmm, yeah. Well, the gauges never reported overheating. Hate to think the seal finaly went
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Old Nov 27, 2005 | 02:13 PM
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Sounds like you learned a valuable lesson. These engines do not tolerate overheating as well as other engines. Sorry to hear about your situation but it sounds like you are in for a teardown.

Why did mess with the stock cooling system? I doesn't sound like you upgraded it by your experience.
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Old Nov 27, 2005 | 05:40 PM
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Sigh. This is true I suppose.
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Old Sep 14, 2006 | 11:07 PM
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From: Rapid City, SD
Rebuild fixed this.

Kent
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