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Head Gasket Repair?

  #26  
Old 06-15-2019, 06:32 AM
Cenla Mini
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ECSTuning ,

Quick question...after reading through a lot of the forums here related to water pumps...obviously OEM Mini water pump kit is more expensive than others but it looks like they use a composite impeller whereas a few of the others you sell use a metal impeller. They all seem to need replacing every 3 - 5 years from what I'm seeing in the forums. Thoughts?
 
  #27  
Old 06-15-2019, 02:42 PM
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Originally Posted by Cenla Mini View Post
Probably a dumb question...but is it OK to do the compression test on the engine cold? I'm not ready to start putting things back together just yet. Also...drained the oil yesterday. If I remember right you just turn the engine over about 10 rounds for each cylinder.
Compression testing on a cold engine will produce numbers slightly lower than a hot engine. Your objective is to get numbers within 10 PSI or so of each other. Any large deviation is an indication of a leak. Cranking the engine with a dry oil pan isn't a good idea, 'specially if the engine hasn't been run for awhile. Lotsa bearing surfaces are at risk, and the cams don't have replaceable bearings, just journals.
 
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  #28  
Old 06-15-2019, 02:50 PM
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Thank you..decided to give a compression leak down test a shot and see how that goes...but I need to know what the numbers should be close to before I try that. I'm not in a hurry since I shot my quick / ready savings to buy it cash. Plan is to have it up and running by the end of Aug/Sep.
 
  #29  
Old 06-15-2019, 03:54 PM
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Originally Posted by Cenla Mini View Post
Thank you..decided to give a compression leak down test a shot and see how that goes...but I need to know what the numbers should be close to before I try that. I'm not in a hurry since I shot my quick / ready savings to buy it cash. Plan is to have it up and running by the end of Aug/Sep.
CR numbers will depend on whose equipment you use. My Harbor Freight set usually produces about 140 PSI and sometimes lower, while my tuner's set produced the recommended numbers of 160. Expect lower for a cold and dry engine. Main thing is minimum variation between cylinders.
 
  #30  
Old 06-15-2019, 04:44 PM
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Awesome...was planning on getting the Harbor Freight set based on a few reviews I saw on YouTube.
 
  #31  
Old Yesterday, 10:14 AM
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Originally Posted by Cenla Mini View Post
ECSTuning ,

Quick question...after reading through a lot of the forums here related to water pumps...obviously OEM Mini water pump kit is more expensive than others but it looks like they use a composite impeller whereas a few of the others you sell use a metal impeller. They all seem to need replacing every 3 - 5 years from what I'm seeing in the forums. Thoughts?
Hello, just get a metal exterior(most all are that now), (old ones were plastic and leak) some people prefer the metal impellar, just a little more insurance over the composite impellar. I have not seen a metal impeller ones fail yet.
 
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