Uh oh, found coolant in the rear intake
- Thread starter Sparky
- Start date
Sparky
Well-known member
The oil looks good
Sparky
Well-known member
I didn’t have to remove the distributor
johnneilson
Well-known member
Do you know the history of this engine?
What are the chances it has seats installed for the valves?
Could it be a head gasket, sure, but it could be a lot of other things.
If you haven't removed the head yet, I would pressurize the water system lightly and check in the port. (20-30 psi max)
Have had port rust thru just below the valve seat area, valve seat crack below the seat, crack thru seat into cylinder, you get the point.
Best of luck, John
What are the chances it has seats installed for the valves?
Could it be a head gasket, sure, but it could be a lot of other things.
If you haven't removed the head yet, I would pressurize the water system lightly and check in the port. (20-30 psi max)
Have had port rust thru just below the valve seat area, valve seat crack below the seat, crack thru seat into cylinder, you get the point.
Best of luck, John
Joe K
Well-known member
Possibly the intake port to cylinder wall crack.
Or is that the exhaust port to cylinder wall? And you happen to have caught it before the water got away elsewhere.
The Model B engine was prone to this. My Gordon Smith engine has this crack in cylinder No. 2, but the way the GS head is configured, the "packing" used to reduce the head clearance on the compressor possibly has sealed the leak. At least I've never found any water in the ports or in the oil.
The engine block may have been "chosen" because of this very defect.
While you're apart you can very well check for cracks. EVERYTHING you might need to find/cure a crack at https://goodson.com/collections/crack-detection-repair.
Or before you tear it down you can try one of the "leak check" devices they sell for about $28 at Auto-Zone.
My son has a Toyota Tacoma with 240K miles and an intermittent engine trouble light diagnosis fail on cylinder 1 and 2.
https://www.autozone.com/p/oemtools...roductBrandId=HWQG&productUniqueId=5423627811
Joe K
Or is that the exhaust port to cylinder wall? And you happen to have caught it before the water got away elsewhere.
The Model B engine was prone to this. My Gordon Smith engine has this crack in cylinder No. 2, but the way the GS head is configured, the "packing" used to reduce the head clearance on the compressor possibly has sealed the leak. At least I've never found any water in the ports or in the oil.
The engine block may have been "chosen" because of this very defect.
While you're apart you can very well check for cracks. EVERYTHING you might need to find/cure a crack at https://goodson.com/collections/crack-detection-repair.
Or before you tear it down you can try one of the "leak check" devices they sell for about $28 at Auto-Zone.
My son has a Toyota Tacoma with 240K miles and an intermittent engine trouble light diagnosis fail on cylinder 1 and 2.
https://www.autozone.com/p/oemtools...roductBrandId=HWQG&productUniqueId=5423627811
Joe K
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Synchro909
Well-known member
These motors are notorious for cracking from the exhaust valve seat in either #2 or #3 cylinders across to the cylinder and then, if you leave it long enough, down the cylinder wall till the engine doesn't run any more. About 3 years ago I was 2,500 miles from home when the engine blew the manifold right at the back of the block. When I took the manifold off, I found droplet of coolant in the front port. I was in a tiny town with no parts shop (no shops at all) so I rang a couple of friends who were coming along behind us and asked them to bring some Chemiweld. I doubt you guys have that brand but I'm equally sure you will have something similar by another name. I added it to the cooling system hoping it would get me home. Now, 3 years and many thousands of miles later, that engine is still going just fine in another car.The product cures when it reaches fresh air and seals a leak well. My Father in Law used to tell me of the time he used in it his truck as a last resort. It was still there when he sold the ruck 25 years later.
I found this description on he net.
Goss Chem-i-Weld is a chemical compound designed to permanently seal cracks, flaws, and porosity in automotive cooling systems, including cylinder heads, engine blocks, and gaskets. It works on iron, aluminum, steel, brass, and bronze, hardening upon exposure to air in confined spaces. It is generally suitable for repairing small leaks rather than severe over-heating.
I found this description on he net.
Goss Chem-i-Weld is a chemical compound designed to permanently seal cracks, flaws, and porosity in automotive cooling systems, including cylinder heads, engine blocks, and gaskets. It works on iron, aluminum, steel, brass, and bronze, hardening upon exposure to air in confined spaces. It is generally suitable for repairing small leaks rather than severe over-heating.
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