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Questions tagged [rings]

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1answer
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Can I remove head off 2002 Altima 2.5 and just hone cylinders to help improve compression

Have a 160,000 mile Altima 2.5 blowing oil. Compression is around 120 across the cylinders. Valve seals fine.I do not want to spend much on this old vehicle. Takes me less than hour to remove head and ...
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1answer
322 views

How are compression rings lubricated?

My question relates to the lubrication of cylinder walls and piston rings. It is my understanding that pistons in cars consists of 3 rings; two compression rings and the oil/scraper ring. As far as I'...
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possible to replace rings in i4 from the bottom?

I'm checking out a 2007 Nissan Sentra 1.8 inline 4, 170k miles, for a friend. I have never witnessed this vehicle while running so here's what I "know." It takes like 20 minutes of cranking before it ...
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1answer
52 views

Pistons ordeal: more pistons problems; two issues in one question

So, still having problems rebuilding this old engine (Skoda Estelle 120, 70's, RWD, rear mounted engine). First of all: getting new parts is out of the question since I have no access to those. So I ...
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1answer
935 views

Do my new oil rings have an excessive gap?

Today I measured the new piston rings I will use while rebuilding my old Skoda Estelle engine. Skoda Set They are new from the Skoda factory (or that's what the box says), but they were ...
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1answer
153 views

Is it really necessary to resurface cylinder and substitute piston?

I believe this is common in motorcycle maintenance, I have heard in some places that, once you get the piston outside the cylinder there is no way back, you need to resurface the cylinder and get a ...