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Oil Pressure Problem
I have a recently rebuilt Unversal 5418 two-cylinder diesel. My
mechanic started the boat last weekend and noticed there was no oil pressure. The engine runs and sounds just fine. Has anyone ever had this problem? Any experience ? Should I curl up in the fetal position? I just spent 4,000 to have this engine rebuilt. |
Oil Pressure Problem
Put a mechanical gauge on it and make sure it's not a gauge problem.
Don't run it any more until you know. It won't make any unusual noise until the bearings are shot and then you get to rebuild it again. wrote: I have a recently rebuilt Unversal 5418 two-cylinder diesel. My mechanic started the boat last weekend and noticed there was no oil pressure. The engine runs and sounds just fine. Has anyone ever had this problem? Any experience ? Should I curl up in the fetal position? I just spent 4,000 to have this engine rebuilt. |
Oil Pressure Problem
Thanks for the response. My mechanic has already put his gauge to it
and confirms no oil pressure. Could there be a bad pump, or some other explanation? jamesgangnc wrote: Put a mechanical gauge on it and make sure it's not a gauge problem. Don't run it any more until you know. It won't make any unusual noise until the bearings are shot and then you get to rebuild it again. wrote: I have a recently rebuilt Unversal 5418 two-cylinder diesel. My mechanic started the boat last weekend and noticed there was no oil pressure. The engine runs and sounds just fine. Has anyone ever had this problem? Any experience ? Should I curl up in the fetal position? I just spent 4,000 to have this engine rebuilt. |
Oil Pressure Problem
Thanks for the educated response. I'm waiting on a call from the folk
who did the rebuild. The problem is that one mechanic started the job and another finished it. Given that scenario, it sounds like that plug may have been opened by one, and not known by the other. The other suspicion I have is that only one piston was replaced, as it was cracked. The other piston and cylinder wall looked fine, so I think he may have put it back together without re-boring the second cylinder. jamesgangnc wrote: It's could be a bad pump but that is normally unlikely. Did you replace it as part of the rebuild? Typically that is part of a rebuild. Oil pumps are simple mechanical devices so they don't usually go bad. One problem can be that a piece of crud gets caught in the relief valve and holds it open. The other possibility and most likely is that one of the oil passageways in the block was not closed back up during the rebuild. Normally you removes passageway plugs before the block gets machined and tanked so it gets as clean as possible. Sometimes leaving one out can result in all the oil just running right back into the pan. If you crank it for a second with the oil filter off and a bucket under it you could get an idea if the oil pump is doing anything at all. If oil comes out I'd put my finger over the hole and try it again to see if it's got any pressure at all. Messy but something to try before you tear it down. I would really try to not run it at all until you figure it out. Bearing wear is very rapid without oil pressure. wrote: Thanks for the response. My mechanic has already put his gauge to it and confirms no oil pressure. Could there be a bad pump, or some other explanation? jamesgangnc wrote: Put a mechanical gauge on it and make sure it's not a gauge problem. Don't run it any more until you know. It won't make any unusual noise until the bearings are shot and then you get to rebuild it again. wrote: I have a recently rebuilt Unversal 5418 two-cylinder diesel. My mechanic started the boat last weekend and noticed there was no oil pressure. The engine runs and sounds just fine. Has anyone ever had this problem? Any experience ? Should I curl up in the fetal position? I just spent 4,000 to have this engine rebuilt. |
Oil Pressure Problem
Only reboring one cylinder is not completely unheard of in the diesel
world. That doesn't explain your oil problem. But I suppose could be indicative of a less than stellar rebuild job. If you got a detailed invoice for the job you might be able to see the parts list and see if a new oil pump is on it. If you paid for a rebuild then it should have oil pressure. At a minimum it should have the oil pressure it had going into the job. But really it should have better since they should have replaced all the bearings. wrote: Thanks for the educated response. I'm waiting on a call from the folk who did the rebuild. The problem is that one mechanic started the job and another finished it. Given that scenario, it sounds like that plug may have been opened by one, and not known by the other. The other suspicion I have is that only one piston was replaced, as it was cracked. The other piston and cylinder wall looked fine, so I think he may have put it back together without re-boring the second cylinder. jamesgangnc wrote: It's could be a bad pump but that is normally unlikely. Did you replace it as part of the rebuild? Typically that is part of a rebuild. Oil pumps are simple mechanical devices so they don't usually go bad. One problem can be that a piece of crud gets caught in the relief valve and holds it open. The other possibility and most likely is that one of the oil passageways in the block was not closed back up during the rebuild. Normally you removes passageway plugs before the block gets machined and tanked so it gets as clean as possible. Sometimes leaving one out can result in all the oil just running right back into the pan. If you crank it for a second with the oil filter off and a bucket under it you could get an idea if the oil pump is doing anything at all. If oil comes out I'd put my finger over the hole and try it again to see if it's got any pressure at all. Messy but something to try before you tear it down. I would really try to not run it at all until you figure it out. Bearing wear is very rapid without oil pressure. wrote: Thanks for the response. My mechanic has already put his gauge to it and confirms no oil pressure. Could there be a bad pump, or some other explanation? jamesgangnc wrote: Put a mechanical gauge on it and make sure it's not a gauge problem. Don't run it any more until you know. It won't make any unusual noise until the bearings are shot and then you get to rebuild it again. wrote: I have a recently rebuilt Unversal 5418 two-cylinder diesel. My mechanic started the boat last weekend and noticed there was no oil pressure. The engine runs and sounds just fine. Has anyone ever had this problem? Any experience ? Should I curl up in the fetal position? I just spent 4,000 to have this engine rebuilt. |
Oil Pressure Problem
I have the mechanic coming over who did the rebuild. On the phone he
told me that if the boat had not been run for six months (since the rebuild was completed), that rust may have built up in the cylinders, or on the valves, and that this might account for the oil pressure problem. Does this sound reasonable? jamesgangnc wrote: Only reboring one cylinder is not completely unheard of in the diesel world. That doesn't explain your oil problem. But I suppose could be indicative of a less than stellar rebuild job. If you got a detailed invoice for the job you might be able to see the parts list and see if a new oil pump is on it. If you paid for a rebuild then it should have oil pressure. At a minimum it should have the oil pressure it had going into the job. But really it should have better since they should have replaced all the bearings. wrote: Thanks for the educated response. I'm waiting on a call from the folk who did the rebuild. The problem is that one mechanic started the job and another finished it. Given that scenario, it sounds like that plug may have been opened by one, and not known by the other. The other suspicion I have is that only one piston was replaced, as it was cracked. The other piston and cylinder wall looked fine, so I think he may have put it back together without re-boring the second cylinder. jamesgangnc wrote: It's could be a bad pump but that is normally unlikely. Did you replace it as part of the rebuild? Typically that is part of a rebuild. Oil pumps are simple mechanical devices so they don't usually go bad. One problem can be that a piece of crud gets caught in the relief valve and holds it open. The other possibility and most likely is that one of the oil passageways in the block was not closed back up during the rebuild. Normally you removes passageway plugs before the block gets machined and tanked so it gets as clean as possible. Sometimes leaving one out can result in all the oil just running right back into the pan. If you crank it for a second with the oil filter off and a bucket under it you could get an idea if the oil pump is doing anything at all. If oil comes out I'd put my finger over the hole and try it again to see if it's got any pressure at all. Messy but something to try before you tear it down. I would really try to not run it at all until you figure it out. Bearing wear is very rapid without oil pressure. wrote: Thanks for the response. My mechanic has already put his gauge to it and confirms no oil pressure. Could there be a bad pump, or some other explanation? jamesgangnc wrote: Put a mechanical gauge on it and make sure it's not a gauge problem. Don't run it any more until you know. It won't make any unusual noise until the bearings are shot and then you get to rebuild it again. wrote: I have a recently rebuilt Unversal 5418 two-cylinder diesel. My mechanic started the boat last weekend and noticed there was no oil pressure. The engine runs and sounds just fine. Has anyone ever had this problem? Any experience ? Should I curl up in the fetal position? I just spent 4,000 to have this engine rebuilt. |
Oil Pressure Problem
On 6 Sep 2006 10:49:22 -0700, "
wrote: I have the mechanic coming over who did the rebuild. On the phone he told me that if the boat had not been run for six months (since the rebuild was completed), that rust may have built up in the cylinders, or on the valves, and that this might account for the oil pressure problem. Does this sound reasonable? No, not to me. |
Oil Pressure Problem
NO! If he is trying that line to maybe get out of fixing his mistake then I
got prime land in the Florida swamp! Up here in PA our boats set about 6months of the year and don't loose oil pressure over winter! wrote in message ps.com... I have the mechanic coming over who did the rebuild. On the phone he told me that if the boat had not been run for six months (since the rebuild was completed), that rust may have built up in the cylinders, or on the valves, and that this might account for the oil pressure problem. Does this sound reasonable? jamesgangnc wrote: Only reboring one cylinder is not completely unheard of in the diesel world. That doesn't explain your oil problem. But I suppose could be indicative of a less than stellar rebuild job. If you got a detailed invoice for the job you might be able to see the parts list and see if a new oil pump is on it. If you paid for a rebuild then it should have oil pressure. At a minimum it should have the oil pressure it had going into the job. But really it should have better since they should have replaced all the bearings. wrote: Thanks for the educated response. I'm waiting on a call from the folk who did the rebuild. The problem is that one mechanic started the job and another finished it. Given that scenario, it sounds like that plug may have been opened by one, and not known by the other. The other suspicion I have is that only one piston was replaced, as it was cracked. The other piston and cylinder wall looked fine, so I think he may have put it back together without re-boring the second cylinder. jamesgangnc wrote: It's could be a bad pump but that is normally unlikely. Did you replace it as part of the rebuild? Typically that is part of a rebuild. Oil pumps are simple mechanical devices so they don't usually go bad. One problem can be that a piece of crud gets caught in the relief valve and holds it open. The other possibility and most likely is that one of the oil passageways in the block was not closed back up during the rebuild. Normally you removes passageway plugs before the block gets machined and tanked so it gets as clean as possible. Sometimes leaving one out can result in all the oil just running right back into the pan. If you crank it for a second with the oil filter off and a bucket under it you could get an idea if the oil pump is doing anything at all. If oil comes out I'd put my finger over the hole and try it again to see if it's got any pressure at all. Messy but something to try before you tear it down. I would really try to not run it at all until you figure it out. Bearing wear is very rapid without oil pressure. wrote: Thanks for the response. My mechanic has already put his gauge to it and confirms no oil pressure. Could there be a bad pump, or some other explanation? jamesgangnc wrote: Put a mechanical gauge on it and make sure it's not a gauge problem. Don't run it any more until you know. It won't make any unusual noise until the bearings are shot and then you get to rebuild it again. wrote: I have a recently rebuilt Unversal 5418 two-cylinder diesel. My mechanic started the boat last weekend and noticed there was no oil pressure. The engine runs and sounds just fine. Has anyone ever had this problem? Any experience ? Should I curl up in the fetal position? I just spent 4,000 to have this engine rebuilt. |
Oil Pressure Problem
That might explain low compression but has nothing to do with lack of
oil pressure. Rust in a cylinder or on a valve would not affect the oil pressure. A rebuilt engine should be able to sit for years before being fired up. All the parts are normally lubricated as they are installed in the block. If it has zero oil pressure then the rebuilder is responsible. One problem is that most shops will fix the engine but won't be responsible for the r&r. I had a problem with a shop that overheated a set of rods when they pressed the pins in. The pins slid out and tore up three cylinder walls. They got me a new block and rods, and bored the new block to fit my pistons. But I had to do the r&r again. wrote: I have the mechanic coming over who did the rebuild. On the phone he told me that if the boat had not been run for six months (since the rebuild was completed), that rust may have built up in the cylinders, or on the valves, and that this might account for the oil pressure problem. Does this sound reasonable? jamesgangnc wrote: Only reboring one cylinder is not completely unheard of in the diesel world. That doesn't explain your oil problem. But I suppose could be indicative of a less than stellar rebuild job. If you got a detailed invoice for the job you might be able to see the parts list and see if a new oil pump is on it. If you paid for a rebuild then it should have oil pressure. At a minimum it should have the oil pressure it had going into the job. But really it should have better since they should have replaced all the bearings. wrote: Thanks for the educated response. I'm waiting on a call from the folk who did the rebuild. The problem is that one mechanic started the job and another finished it. Given that scenario, it sounds like that plug may have been opened by one, and not known by the other. The other suspicion I have is that only one piston was replaced, as it was cracked. The other piston and cylinder wall looked fine, so I think he may have put it back together without re-boring the second cylinder. jamesgangnc wrote: It's could be a bad pump but that is normally unlikely. Did you replace it as part of the rebuild? Typically that is part of a rebuild. Oil pumps are simple mechanical devices so they don't usually go bad. One problem can be that a piece of crud gets caught in the relief valve and holds it open. The other possibility and most likely is that one of the oil passageways in the block was not closed back up during the rebuild. Normally you removes passageway plugs before the block gets machined and tanked so it gets as clean as possible. Sometimes leaving one out can result in all the oil just running right back into the pan. If you crank it for a second with the oil filter off and a bucket under it you could get an idea if the oil pump is doing anything at all. If oil comes out I'd put my finger over the hole and try it again to see if it's got any pressure at all. Messy but something to try before you tear it down. I would really try to not run it at all until you figure it out. Bearing wear is very rapid without oil pressure. wrote: Thanks for the response. My mechanic has already put his gauge to it and confirms no oil pressure. Could there be a bad pump, or some other explanation? jamesgangnc wrote: Put a mechanical gauge on it and make sure it's not a gauge problem. Don't run it any more until you know. It won't make any unusual noise until the bearings are shot and then you get to rebuild it again. wrote: I have a recently rebuilt Unversal 5418 two-cylinder diesel. My mechanic started the boat last weekend and noticed there was no oil pressure. The engine runs and sounds just fine. Has anyone ever had this problem? Any experience ? Should I curl up in the fetal position? I just spent 4,000 to have this engine rebuilt. |
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