Technical changing Piston rings Bravo 1.4 sx 96
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- 1.4sx bravo compression pistonrings
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Technical changing Piston rings Bravo 1.4 sx 96
jimmyybob
New member
Its a bit of a can of worms this one, you should also change the bigend shells if you doing the rings.
Piston rings are very fragile one mistake or over stretch and you can easily snap one, clean the ring grooves before fitting the new rings and make sure you fit them the correct way up and then set them with the ring gaps in the correct positions, also hone the bores.
But seriously its one of those jobs that if your not sure what your doing......dont do it.
Your lack of compression may well be caused by something in the head..... burnt valves in perticular.
Piston rings are very fragile one mistake or over stretch and you can easily snap one, clean the ring grooves before fitting the new rings and make sure you fit them the correct way up and then set them with the ring gaps in the correct positions, also hone the bores.
But seriously its one of those jobs that if your not sure what your doing......dont do it.
Your lack of compression may well be caused by something in the head..... burnt valves in perticular.
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You're wasting your time guesing and playing with the piston rings, a '96 car will be due for an engine overhaul by now if it is showing signs of wear. If you want to keep the car find a helpful, reasonable engine reconditioner and expect to get new bearing shells, rebore or rehone of cylinders, maybe new pistons, rings and a head refresh (valve guides, maybe valves). You should get back most of the performance of a new engine.
You can check the rings by doing a "wet" compression test, get readings for each cylinder as they are now, then squirt engine oil around the sides of each piston and repeat the test. if the oil makes the readings higher, it is sealing leaks due to wear of the block and rings.
You can check the rings by doing a "wet" compression test, get readings for each cylinder as they are now, then squirt engine oil around the sides of each piston and repeat the test. if the oil makes the readings higher, it is sealing leaks due to wear of the block and rings.
You should try what bluejohn125 suggested, if you still have the head on the block.
If not you can try the following:
- put some gasoline in each of the cylinders...
wait 2-3 minutes see if there is a noticeable difference in the levels of the gasoline.
-try the same thing with the head most probably the gasoline will go out fast.
-if so i recomend changing any bent/burned valves and a good valve and seat polishing.
-repeat until the gasoline in the head stays there .. at the same level in all combustion chambers.
If not you can try the following:
- put some gasoline in each of the cylinders...
wait 2-3 minutes see if there is a noticeable difference in the levels of the gasoline.
-try the same thing with the head most probably the gasoline will go out fast.
-if so i recomend changing any bent/burned valves and a good valve and seat polishing.
-repeat until the gasoline in the head stays there .. at the same level in all combustion chambers.
just a word of advice, it will be cheaper to buy a second hand cylinder block, i was quoted silly money for rings
jimmyybob
New member
£140 just for the rings.
It would be cheaper and more productive to buy a head gasket and have a look in there to see what the problem is.
It would be cheaper and more productive to buy a head gasket and have a look in there to see what the problem is.
