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rdh2

Coolant Leak

13 posts in this topic

:angry: So, 57 miles short of 200,000, I'm running errands and notice the temp gauge heading north. No matter the weather, the temp has never gone above 1/2 scale. I know its getting hot because even the AC is getting warmer.

Driving down the road doesn't help (ram air), so I pull in to Advance where my son is working. I pop the hood and the reservoir is empty. I hear a "hissing" sound from the front of the engine. I carefully removed the cap and it is dry. I add a gallon of coolant and start the car up. Temp was good, but its leaking coolant. At this point I'm looking everything over and see a small stream of coolant - its on the right side of the front of the block and either from an external head gasket leak or from the front cover. Now I am officially pissed. At least there is not water in the oil. I have Matt price out gasket sets just in case.

Throw the cap back on and drive the 5 miles home - all is normal. Park on the street, get out, and coolant is streaming out the bottom of the car. I pop the hood and see it in the same spot on the block.

I'm hoping its the front cover, knowing it probably is a head gasket, and debating what to do. Do I fix the immediate issue of the leak or yank the engine and go through it because of mileage?

Ok, rant over. Thanks for your time.

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if you have the time and resources, i.e. another mode of transport, might as well go ahead and go through it. probly not a bad idea on a 200k car.

if that is not the case, definately fix the immediate issue to prevent causing unnecessary harm to the engine, and go through it when you are able. either way best of luck with her

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Bob, I know you know your s**t with cars.

But, from one tech to another, we've seen crazy, crazy s**t.

A few years ago, had an '88 Mitsubishi Sigma in the shop with the 6G72 3.0L V6.....they knew the head gasket was popped. It was leaking water right there, you could see it plain as day! (I kept pics of this one for a reason)

See? Leaking all over the place, surely coming from the side of the head:

picture002yn.jpg

So, we filled it up, and in true Texas shop style, cracked a beer, and waited for thermostat to open. Holy hell, what do you know!

picture011ek.jpg

Here's my point. If you haven't given the thing a good nuking, or have some reason to believe you threw the head gasket, it probably isn't bad. If the compression is good, and the car runs cool with coolant in it, and you have nothing going out the tailpipe, and nothing filling up the oil pan, it's probably something stupid like this pinhole in the radiator hose.

Tim

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good point, Zorinator

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Have you replaced your Heater Core Bypass yet?

You said you are sure the FRONT of the block? NM then.

Edited by thesavo

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Well, after cleaning the area, things may be looking slightly better.

I am beginning to think the leak might be from the upper aft part of the timing cover. My plan is to get the front cover off and see what I find. The old bull may have some life left yet!

I'll try to remember pics for a writeup. Sometimes I get so wrapped up in the task, I forget the pics.

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i do that all the time with the pics. just get goin on something an next think you know its back together and you didnt take a single photo haha

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front cover they corrode from straight a-freeze OR syraight water, seems worse with a mix, and tap water. i mean NO-ONE uses distilled water right, that's just a myth. basically you're looking at electrolosis. i can't even count how many of these things i've replaced or did a half assed fix, because the customer couldn't/didn't want to buy a new one.

pressure test and see if it sprays or bubbles

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I used distilled water. I bought 4 gallons last week. just to be sure I had enough. Made a 60/40 mix.

Also: I just noticed in Post3. the 2nd pic has straight get of water spaying out. I have looked @ it 4 times, and just noticed the trouble.

Edited by thesavo

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front cover they corrode from straight a-freeze OR syraight water, seems worse with a mix, and tap water. i mean NO-ONE uses distilled water right, that's just a myth. basically you're looking at electrolosis. i can't even count how many of these things i've replaced or did a half assed fix, because the customer couldn't/didn't want to buy a new one.

pressure test and see if it sprays or bubbles

I'm hoping its not corroded. I use distilled water for mixing antifreeze. I have to find a pressure tester - my local Autozone does not have the adapter for our setup in their kit and Advance's rental kit is broke.

Hope to start working on it this weekend.

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Finally got the car done. When I got the timing cover cover off, I was very happy with what I saw. :)

There was hardly any corrosion and the engine was clean.

In the upper corner of the timing cover, you could see where coolant had been leaking past the gasket. I was able to clean up the cover just fine. I think the gasket was just worn out from age/mileage.

So here is what I ended up replacing:

Timing Cover gasket, Crankshaft Seal, Timing Chain and Gears, Oil Pan gasket, Lower radiator Hose, Upper Radiator Hose, Thermostat, Water Pump.

Being that I have nearly 200K on the car, I replaced the timing chain and gears just because. The new ones did not have any less free play than what I took off.

When I pulled the timing cover and oil pan, I was extremely happy with the cleanliness I found. Both the cover and oil pan had a light film covering and absolutely no sludge. The oil pump screen was very clean.

I'll get a couple pics up of where I believe it was leaking - I have to find the camera.

The only issue I had was the upper hose. I bought a Dayco hose at Advance and the diameter of the hose was just large enough to allow the hose to slide right on the thermostat housing and the clamp would not tighten up. Picked up another hose at AutoZone (Dayco also) and it fit ok. I think the first hose was from a bad lot.

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I tightened up the same hose on my taurus today. Every week I was adding about a quart of coolant. Turns out it was just a slightly loose clamp.

It never fails, when I pay someone else to work on the car I end up fixing it again.

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that's why I'm the ONLY one to touch mine. the ghost goes to the shop, but mine, HE LL NAWWW!

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