Question about 1997 Nissan Sentra
Can I fit valve stem seals without taking the head off
No you can't..
Fitting valve stem seals involves removing the valve springs. This means the valve has to be held in place by a valve spring compressor (bought from almost any spares outlet). The springs are compressed by placing one end of the compressor tool on the valve face and the other end over the spring cap, then squeezing the tool to compress the spring, then removing the split collets that hold the spring in place, removing the spring cap and spring, then eventually you have access to the stem seals.
The head has to be removed to accomplish all this.
Posted on Nov 21, 2014
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Posted on Jan 02, 2017
SOURCE: nissan sentra 1.6 1980
Sounds like poor engine rebuilt work. The rings probably were not aligned properly. they need to be placed in their proper positions. The valves, guides, weak spings, etc. (Was your cylinder or head machined) Also you could have used incorrect rings-size. Keep looking online for manual guides
Posted on Nov 05, 2009
Here's what the tech data says for installation:
Posted on Jun 07, 2010
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