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Print in friendly format Send this term to a friend  Interior Lights
There is one in each door. On the 1984-1989 C4s, the door lights can be turned on and off by pressing them.

There are lights under each knee bols...
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hcbph Checked your radiator lately?
Senior Guru
243 Posts
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2014/4/4 2:24



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I took the time today to remove the cover over the radiator and a/c condenser today, boy was there a lot of crap in there!
I was surprised that the area was probably packed 1/4+ of the way up from the bottom with leaves and other stuff that had accumulated over the years. It turned out to be a lot of fun getting it all out of there, it was packed in there solid. I had a small vacuum cleaner hose that just fit through the gap in the top and was able to eventually get it out. I had to take a L shaped rod and rake it to work all the stuff loose. Once loose, then suck it till the hose plugged up, clean out the hose and do it again till it was all out.


I was amazed at just how much junk had collected over there, then got to thinking that it's probably not been touched since it left the factory 32 years ago.

If you haven't looking at yours, may be time to do just that.


Paul.
Posted on: 2018/5/26 19:46
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bogus Re: Checked your radiator lately?
Grand Imperial Pooh-Bah
San Pedro, CA
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2005/9/7 0:00



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love bottom feed cooling systems... they are part street sweeper.
Posted on: 2018/5/26 21:23
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Education is the best tool to overcome irrational fear. - me

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CorvetteBob Re: Checked your radiator lately?
Master Guru
963 Posts
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2008/10/19 18:34



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This is one of those fixes that so often go overlooked. You made a good catch with this, and it also will hopefully assist someone else in the future that has overheating issues.
Gotta love those free fixes!
Posted on: 2018/5/28 13:56
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Matatk Re: Checked your radiator lately?
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SW Chicago Burbs
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That's a good reminder. Another tip to get the junk out is to use a long blow gun tip with compressed air. I've also seen someone fab up a long piece of thin PVC and attach it to a garden hose to spray it all out.
Posted on: 2018/5/28 15:47
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1989 Corvette...custom 383 stroker, superrammed and cammed, built trans with PeteK 2800 stall. Mustang dyno results: 336 rwhp / 419 rwtq.
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hcbph Re: Checked your radiator lately?
Senior Guru
243 Posts
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I'll pass along a couple of things I found doing this, may make it a little simpler for others.
First off you'll need a 7mm, 10mm & 13mm wrench. You don't have to drain the radiator or pull the fan the way I did it. Don't know if everyone approves of this as I did one little mod, but it worked. Remove the air cleaner assembly off the top and unsnap it from the intake. I pulled the 2 studs off the cover just so I wouldn't lose them.
Unbolt the top 2 bolts off the fan (13mm). Unbolt the cover from the radiator support (a mix of 7mm & 10mm) - 7 mm on the front and 10 on the back side. You also need to unbolt the power steering reservoir off the cover along with the a/c drier. There are retainer clips on the dryer so if you loosen it evenly the bolts will be held on the dryer DAMHIK.
Here's the mod I did so I didn't have to drain the radiator etc to gain access. Pull the wire off the low coolant sensor under the radiator car. You might be able to work it up with just this, I couldn't. There's a hole for that sensor and tranny cooler lines, I took a set to sheetmetal snips and trimmed the tab areas below then so the cover would slide off the passenger side completely. Work the cover up and around the upper radiator hose, you now have complete access through the top.
Mine had a lot of gunk and it was hardened over the years. I took a L shaped rod and went down in there to break it loose. A vacuum cleaner small hose will fit between the radiator and the a/c condenser. Just keep at it till it's all out. I also took an air hose from the back side and blew through the radiator core to insure it was as clean as I could get it.

Reassemble in reverse order and you're ready to hit the road. I probably should have taken some pictures but I didn't. Ironically I was checking engine temp - before and after cleaning out the junk. Ironically it ran around 186-189 degrees before I cleaned it, and it's run 186-190 since but a slightly hotter day - both times were highway driving.

Can't say it helped the engine temp, but it gives me a little better peace of mind now knowing it's cleaned out.


Posted on: 2018/5/29 15:53
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bearcat Re: Checked your radiator lately?
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West Texas
19 Posts
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2012/12/3 16:58



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I noticed the same thing on mine. It gets really hot where I live, and I had some concerns watching the temp climb when it was 106 outside. So I ordered a larger aluminum radiator and dove into pulling the old one.
Also, the old one was leaking at the tanks.

All of the crap in the bottom was probably one reason why the radiator wasn't performing as it should. The dripping at the plastic tanks was another. And the hot Texas weather was another reason still.

It runs a lot cooler, but if you get a thicker radiator, you have to modify the shroud. It's made for the thinner OEM style.
Posted on: 2018/9/10 3:13
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Matatk Re: Checked your radiator lately?
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SW Chicago Burbs
21618 Posts
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The side tanks are a common failure point. I'm assuming you put in a three row, should do just fine.
Posted on: 2018/9/12 3:19
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1989 Corvette...custom 383 stroker, superrammed and cammed, built trans with PeteK 2800 stall. Mustang dyno results: 336 rwhp / 419 rwtq.
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