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96 sentra with Top end noise
Hello Guy's and Gal's! I am new to this Forum and just purchased a 96 Nissan Sentra that has around 200k on the engine and trans. The car was very clean except for the oil leaks ( there were many!) I have repaired all the leaks inspected the timing chain and replaced the upper guide,changed the oil and tranyfluid also the filters all looked good. I also tuned up the car with everything that I could through at it. The only thing that i have not looked at is the timing which will be done this weekend. My problem is the car is down on power and has a top end noise when the motor hits peak torque (as the trans shifts) this to me being a mechanic is very disturbing for sure! I have to say that this engine internally was extremely clean and the indications are that it was taken care of besides the oil leaks that is. I suspect that this person sold the car due to this problem? The car made no noise when I bought it has zero blow by and burns No oil again all indicators of a well treated engine in my book? I guess my first steps will be to check the oil pressure,(which seems fine because there is huge volumes of oil in the rocker box) and maybe do a compression test. From there I need to know what you recommend? I have the factory Manuel and IMO there seems to be a problem with valve actuation? The cams look great but I suspect that the valves just are not opening all the way?? Please help I can't really afford anything else at this time Lol! Thanks
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#3
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I replaced the upper guide because of a small amount of noise that was emmiting from the cover area. I also had been doing research and heard that this was a common failure point with this kind of milaege. The guide was not broken just worn. I must say that the chain and sprokets and cams all look like they are new! I think the previous owner did the maintenance for sure because of the cleanlyness inside the engine. As far as the timming goes I will check it for sure but I can honestly say that it runs very smoth for a car that is out of time? If that were the senerio wwouldn't the engine be a bit twitchy? I will be honest I do not have any experiance with the foriegn car scene but I have been working on American cars for as long as i can remember and have several older cars. That being said I am in another World now!
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end, noise, sentra, top |
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