Engine Oil Leaks Due to Porous Engine Block Casting on Honda Accord

The engine may develop and oil leak due to a porous engine block casting. The repair procedure is dependent on where the leak is located. Honda has released a service bulletin covering model years 1998-2003. Honda may offer assistance with repairs, determined on a case by case basis.

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Average mileage: 159,626 (21,000–292,000)
Engines affected: 2.3L 4 Cylinder, 2.4L 4 Cylinder, 3.0L V6
8 model years affected: 1998, 1999, 2000, 2001, more2002, 2003, 2004, 2009
115 people reported this problem
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Viewing 1 - 20 of 64 problem details
1999 Honda Accord - 3.0L V6 140,000 mi,
I was told by the Honda dealer that my Honda has a porous block and the only way to fix it is to replace the engine with a used engine because they can not get a new engine. How do I know the used engine will not have a porous block?
2000 Honda Accord - 2.3L 4 Cylinder 145,000 mi,
I have had this Honda Accord now for a year and a half, with no problems, never overheated, excellent mileage etc. and 3 weeks ago I discovered a substance resembling molasses in the coolant expansion reservoir, then I opened the radiator cap and discovered more of that substance in the radiator, checked the engine oil level and it dropped closer to the lower dot. I always ensure that the oil level is between the 2 dots The engine oil is super clean no trace of any coolant, so I am assuming there is a crack in the engine. I constantly monitor the engine oil level and top it off as needed ( approx 1 quart per 1000 kilometers), and I also empty out the expansion bottle into a waste oil container once a week and fill it with fresh coolant . The upper radiator hose was also replaced because it started to deteriorate. I am not sure what to do to fix the problem, other than replace the engine, what other solution is there ? thanks Carlos
2001 Honda Accord - 2.3L 4 Cylinder 65,000 mi,
Has not been fixed, cannot find where leak is. Oil all underside of engine. Leaks pretty bad.
1999 Honda Accord - 2.3L 4 Cylinder 190,000 mi,
Replaced head gasket. Still find oil in radiator. Must be a leak in the block. I wish Honda would admit the problem so there could be a diagnostic. A lot of people have wasted a lot of repair money on a design flaw that has no fix.
2000 Honda Accord - 2.3L 4 Cylinder 84,000 mi,
We just got this car and now, we have oil in the cooling system. I was told I have a "porous" engine block and need to replace the engine. Also, the check engine light is on and I was told that I may need to replace the computer. I was told "this is a problem car". This is all adding up to close to $4,000! I am wondering should I keep this car or trade it for something without so many problems?
1998 Honda Accord - 2.3L 4 Cylinder 198,000 mi,
My '98 accord leaks oil out as fast as you put it in. My mechanic says it's not worth fixing. I'm wondering if pourous block is to blame. Oil in coolant reservior. New head gasket.
1999 Honda Accord - 2.3L 4 Cylinder 200,000 mi,
Have had to replace head along with heater core and have to flush out oil in cooling system. Quite frustrating. I certainly would not re-sale this car for more than 500 to 1000 dollars. Bought it for around 4000 a few years ago. I don't think as highly of Honda as I used to. Will just have to keep flushing it out until we find another vehicle that is dependable.
2003 Honda Accord - 3.0L V6 64,000 mi,
I just recent noticed oil leak on my Honda 2003 Accord Ex V6. I was told by Honda service team that they were not 100% sure until they have to remove the transmission to determine the cause for sure. With 64K miles and good maintenance record from Honda service. I was told that could be cause by engine block which may cause 5-6k to replace the engine. I am kind disappointed with the news, but that was my bad luck then...
2003 Honda Accord - 2.4L 4 Cylinder
My have engine oil leak
2002 Honda Accord - 2.3L 4 Cylinder 21,000 mi,
oil started to leak into the coolant. The leakage is getting worse with time
1999 Honda Accord - 2.3L 4 Cylinder 135,000 mi,
Oil in coolant; head gasket is fine; will require new block.
1999 Honda Accord - 2.3L 4 Cylinder 116,000 mi,
Told by dealer that engine has bad / porous casting that lets engine oil and coolant mix once the engine heats up. Repair costs ~4000
1998 Honda Accord - 2.3L 4 Cylinder 250,000 mi,
Oil is leaking from bottom ... Not sure where leak is coming from .. It has always used oil but not very bad then suddenly started leaking a lot when car is running .. Don't leak if car is off
2002 Honda Accord - 2.3L 4 Cylinder 146,786 mi,
Found oil in the coolant system. So I drain all the oil leave the drain plug off put 15 psi air pressure leave it over night found 1 litre next morning Found block has little crack.
1999 Honda Accord - 2.3L 4 Cylinder 114,000 mi,
Oil in coolant reservoir and radiator. Dealer says car needs replacement motor. Sold car for parts.
2002 Honda Accord - 3.0L V6 72,900 mi,
i paid over 1K to have,and i am not making this up,straub honda in whheling,wv use JB Weld(the approved honda fix for this problem)about one(1) year ago;the problem has reappeared and it is now estimated to be $9669.00 to replace the short block & recondition the head;that has to be at least the current value of the automobile,if not in excess of it;
2002 Honda Accord - 2.3L 4 Cylinder
I have 2002 Honda accord 2.3 liter 4 cylinder v-tec has lots of oil in cooling system. this vehicle only has 124,000 miles on it maintenance always performed never over heated ever, problem is do to high pressure oil galley cracked or porous positively a manufacture defect ? why wont Honda make this right total b.s. I will never buy a Honda again!!!!!
1998 Honda Accord - 2.3L 4 Cylinder 180,183 mi,
My engine leaks oil, it goes throught about 1 and 2 liters per week to two weeks. I had a machanic look at my engine, and he said that he believes that it is coming from my engine Beaune I have replaced everything else, that would involve an oil leak yet, it is still leaking oil. Can you help me?
1999 Honda Accord - 2.3L 4 Cylinder 190,000 mi,
Oil in the cooling system. Already had the engine out once and rebuilt, now less than 1500 miles later it has done the same thing over again.
1998 Honda Accord - 2.3L 4 Cylinder 201,000 mi,
engine seems to be leaking oil. oil light comes one every 3 days and add a quart of oil. The other day after adding oil engine became extremely loud. using the proper 5w-30 oil.