mjtjnj Posted November 6, 2008 Share Posted November 6, 2008 OK, I have about 1200 miles on the rebuilt 2.5. It was rebuilt by a good shop, so I know they didn't put the rings in wrong or anything. No smoke, no leak, no fouled plugs, no oil in the air filter, but I'm using oil. The builder told me to check the PCV system. I told him I had a CCV and no PCV valve, he was surprised and said to check vacuum at the dipstick, that there should be 4-5" of vacuum there. Well, there wasn't, but I have good vacuum to the valve cover -- and that's my question. The grommet with the 2.2mm orifice in the back of the valve cover got pretty crummy looking a few years back so I took a drill bit and honed it out to open it up a bit. Could I be sucking up a good bit of oil from the roller rockers? That's the only thing I can figure so far. If I take the truck on a good highway run, maybe 40 miles round trip, I'm using almost half a quart! I'm going to start with this grommet. Is it too soon to worry with 1200 miles? I'm using dino oil by the way, no synthetic yet. Tom :huh???: Link to comment Share on other sites More sharing options...
mjtjnj Posted November 6, 2008 Author Share Posted November 6, 2008 OK, I have about 1200 miles on the rebuilt 2.5. It was rebuilt by a good shop, so I know they didn't put the rings in wrong or anything. No smoke, no leak, no fouled plugs, no oil in the air filter, but I'm using oil. The builder told me to check the PCV system. I told him I had a CCV and no PCV valve, he was surprised and said to check vacuum at the dipstick, that there should be 4-5" of vacuum there. Well, there wasn't, but I have good vacuum to the valve cover -- and that's my question. The grommet with the 2.2mm orifice in the back of the valve cover got pretty crummy looking a few years back so I took a drill bit and honed it out to open it up a bit. Could I be sucking up a good bit of oil from the roller rockers? That's the only thing I can figure so far. If I take the truck on a good highway run, maybe 40 miles round trip, I'm using almost half a quart! I'm going to start with this grommet. Is it too soon to worry with 1200 miles? I'm using dino oil by the way, no synthetic yet. Tom :huh???: Link to comment Share on other sites More sharing options...
Eagle Posted November 6, 2008 Share Posted November 6, 2008 I don't know what the problem is, but you definitely have a problem. Half a quart in 40 miles extrapolates to using 31.25 quarts in a 2500 mile oil change interval. Even by Ford standards, that's a mite excessive. Compression check? Leak-down check? What did they use for rings? Is it possible the new rings haven't seated yet? Maybe they didn't hone the cylinder walls correctly? Link to comment Share on other sites More sharing options...
Eagle Posted November 6, 2008 Share Posted November 6, 2008 I don't know what the problem is, but you definitely have a problem. Half a quart in 40 miles extrapolates to using 31.25 quarts in a 2500 mile oil change interval. Even by Ford standards, that's a mite excessive. Compression check? Leak-down check? What did they use for rings? Is it possible the new rings haven't seated yet? Maybe they didn't hone the cylinder walls correctly? Link to comment Share on other sites More sharing options...
mjtjnj Posted November 6, 2008 Author Share Posted November 6, 2008 I know! I'm hoping it's that the rings didn't seat. After I replace the grommet, if it continues, I'm going to drive it to his shop and let him do leak down tests. I've had bad rings before and usually get oil-coated plugs. I would expect smoke, or something! It's strange. Link to comment Share on other sites More sharing options...
mjtjnj Posted November 6, 2008 Author Share Posted November 6, 2008 I know! I'm hoping it's that the rings didn't seat. After I replace the grommet, if it continues, I'm going to drive it to his shop and let him do leak down tests. I've had bad rings before and usually get oil-coated plugs. I would expect smoke, or something! It's strange. Link to comment Share on other sites More sharing options...
Randy in Maine Posted November 6, 2008 Share Posted November 6, 2008 Are you running a break in oil to break in the camshaft and rings? Are the rings properly broken in? After breaking in the camshaft, I change the oil. Brad Penn Break in 30 weight non-detergent dino oil. After 100 miles I change the oil and the filter. Brad Benn 15-40 Dino oil. After 1000 miles I change the oil and filter. Brad Penn 15-40 Dino oil. After 3,000 miles I change the oil and filter and if you are going to use a synthetic or partial syn oil, you can now go to that. I change my oil and filter every 5,000 miles after that. Brad Penn 10-30 partial syn. Link to comment Share on other sites More sharing options...
Randy in Maine Posted November 6, 2008 Share Posted November 6, 2008 Are you running a break in oil to break in the camshaft and rings? Are the rings properly broken in? After breaking in the camshaft, I change the oil. Brad Penn Break in 30 weight non-detergent dino oil. After 100 miles I change the oil and the filter. Brad Benn 15-40 Dino oil. After 1000 miles I change the oil and filter. Brad Penn 15-40 Dino oil. After 3,000 miles I change the oil and filter and if you are going to use a synthetic or partial syn oil, you can now go to that. I change my oil and filter every 5,000 miles after that. Brad Penn 10-30 partial syn. Link to comment Share on other sites More sharing options...
mjtjnj Posted November 6, 2008 Author Share Posted November 6, 2008 Are you running a break in oil to break in the camshaft and rings? Are the rings properly broken in? After breaking in the camshaft, I change the oil. Brad Penn Break in 30 weight non-detergent dino oil. After 100 miles I change the oil and the filter. Brad Benn 15-40 Dino oil. After 1000 miles I change the oil and filter. Brad Penn 15-40 Dino oil. After 3,000 miles I change the oil and filter and if you are going to use a synthetic or partial syn oil, you can now go to that. I change my oil and filter every 5,000 miles after that. Brad Penn 10-30 partial syn. Here's what the builder told me to do: filled it with 10-W30 Castrol, initial startup and run at 2400RPM for 20 mins. Shut down, change oil. Change oil again 500 miles later. I've used 10W30 Castrol each time. He did not specify a weight, only that it be dino oil. It's possible the rings haven't seated yet, is that just a matter of time, or something I have to do? Thanks Tom Link to comment Share on other sites More sharing options...
mjtjnj Posted November 6, 2008 Author Share Posted November 6, 2008 Are you running a break in oil to break in the camshaft and rings? Are the rings properly broken in? After breaking in the camshaft, I change the oil. Brad Penn Break in 30 weight non-detergent dino oil. After 100 miles I change the oil and the filter. Brad Benn 15-40 Dino oil. After 1000 miles I change the oil and filter. Brad Penn 15-40 Dino oil. After 3,000 miles I change the oil and filter and if you are going to use a synthetic or partial syn oil, you can now go to that. I change my oil and filter every 5,000 miles after that. Brad Penn 10-30 partial syn. Here's what the builder told me to do: filled it with 10-W30 Castrol, initial startup and run at 2400RPM for 20 mins. Shut down, change oil. Change oil again 500 miles later. I've used 10W30 Castrol each time. He did not specify a weight, only that it be dino oil. It's possible the rings haven't seated yet, is that just a matter of time, or something I have to do? Thanks Tom Link to comment Share on other sites More sharing options...
Randy in Maine Posted November 6, 2008 Share Posted November 6, 2008 From aircooled.net with a few things removed that do not apply to our watercoolers.... "Now that the "camshaft break in" is done, you want to REALLY heat the engine up by driving it hard! This loads the rings and will break the pistons, cylinders, and rings in together. Find a hill and drive full throttle up the thing a few times, in a gear that loads the engine down a bit. The loading and extra heat burns the glaze off the cylinders and allows everything to seat together well. I do not feel a longer "break in" period is needed (some say 10,000 miles) other than getting the rings seated, and this can be done in 500 miles. Link to comment Share on other sites More sharing options...
Randy in Maine Posted November 6, 2008 Share Posted November 6, 2008 From aircooled.net with a few things removed that do not apply to our watercoolers.... "Now that the "camshaft break in" is done, you want to REALLY heat the engine up by driving it hard! This loads the rings and will break the pistons, cylinders, and rings in together. Find a hill and drive full throttle up the thing a few times, in a gear that loads the engine down a bit. The loading and extra heat burns the glaze off the cylinders and allows everything to seat together well. I do not feel a longer "break in" period is needed (some say 10,000 miles) other than getting the rings seated, and this can be done in 500 miles. Link to comment Share on other sites More sharing options...
mjtjnj Posted November 6, 2008 Author Share Posted November 6, 2008 From aircooled.net with a few things removed that do not apply to our watercoolers.... "Now that the "camshaft break in" is done, you want to REALLY heat the engine up by driving it hard! This loads the rings and will break the pistons, cylinders, and rings in together. Find a hill and drive full throttle up the thing a few times, in a gear that loads the engine down a bit. The loading and extra heat burns the glaze off the cylinders and allows everything to seat together well. I do not feel a longer "break in" period is needed (some say 10,000 miles) other than getting the rings seated, and this can be done in 500 miles. So it's very variable. I'm going to start by getting the CCV system operating the way it was designed, and if it continues, I will have the builder run some tests on it. It's running great -- really smooth, and with a lot more power. Hopefully the oil consumption comes down to a minimum. :pcwhack: Link to comment Share on other sites More sharing options...
mjtjnj Posted November 6, 2008 Author Share Posted November 6, 2008 From aircooled.net with a few things removed that do not apply to our watercoolers.... "Now that the "camshaft break in" is done, you want to REALLY heat the engine up by driving it hard! This loads the rings and will break the pistons, cylinders, and rings in together. Find a hill and drive full throttle up the thing a few times, in a gear that loads the engine down a bit. The loading and extra heat burns the glaze off the cylinders and allows everything to seat together well. I do not feel a longer "break in" period is needed (some say 10,000 miles) other than getting the rings seated, and this can be done in 500 miles. So it's very variable. I'm going to start by getting the CCV system operating the way it was designed, and if it continues, I will have the builder run some tests on it. It's running great -- really smooth, and with a lot more power. Hopefully the oil consumption comes down to a minimum. :pcwhack: Link to comment Share on other sites More sharing options...
Randy in Maine Posted November 6, 2008 Share Posted November 6, 2008 I would also not even think about doing a compression test or leakdown test until it is all broken in or about 1,000 miles. It won't tell you what you are looking for. Link to comment Share on other sites More sharing options...
Randy in Maine Posted November 6, 2008 Share Posted November 6, 2008 I would also not even think about doing a compression test or leakdown test until it is all broken in or about 1,000 miles. It won't tell you what you are looking for. Link to comment Share on other sites More sharing options...
Pete M Posted November 6, 2008 Share Posted November 6, 2008 Any evidence of your rear main seal leaking oil when the engine is under load? Link to comment Share on other sites More sharing options...
Pete M Posted November 6, 2008 Share Posted November 6, 2008 Any evidence of your rear main seal leaking oil when the engine is under load? Link to comment Share on other sites More sharing options...
mjtjnj Posted November 6, 2008 Author Share Posted November 6, 2008 Not that I've been able to see so far! No puddles, or even drips, under the truck :ack: , even when parked after a highway trip. Link to comment Share on other sites More sharing options...
mjtjnj Posted November 6, 2008 Author Share Posted November 6, 2008 Not that I've been able to see so far! No puddles, or even drips, under the truck :ack: , even when parked after a highway trip. Link to comment Share on other sites More sharing options...
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