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Thread: Piston ring gap

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    autolatry's Avatar
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    Piston ring gap

    Anyone got any ideas as to what the piston ring gap should be on a 3.2 v6?

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    Quote Originally Posted by autolatry View Post
    Anyone got any ideas as to what the piston ring gap should be on a 3.2 v6?
    i would offset the gap by 120 degrees be carefully as many rings are marked for order ,use plenty of oil on the bores when fitting also I would slip the rings up into place with feeler gauges to prevent damage.

    i take it you have 3 rings ,2 compression and 1 oil

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    Yeah, 2 compression and one oil per piston.

    I took the car off the garage this morning, can't wait forever for them to pull thei finger out.
    The compreision rings on cylinders 2 3 and 4 are stuck, so fair play to them for diagnosing that correctly I suppose.

    Ive removed them all now so I'm gonna clean them up and try and fit the new ones. The garage lent me their tool to fit them, it's like a sleeve that fits over the cylinder and tightens up with a key.

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    Quote Originally Posted by autolatry View Post
    Yeah, 2 compression and one oil per piston.

    I took the car off the garage this morning, can't wait forever for them to pull thei finger out.
    The compreision rings on cylinders 2 3 and 4 are stuck, so fair play to them for diagnosing that correctly I suppose.

    Ive removed them all now so I'm gonna clean them up and try and fit the new ones. The garage lent me their tool to fit them, it's like a sleeve that fits over the cylinder and tightens up with a key.
    I think your talking about a piston ring compressor ,rings are quite easy to break I have seen in done when rebuilding industrial refrigeration compressors back in the day

    i bet your sick of that car can't blame you for not being a fan of it .

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    Yep. Sick to bloody death of it lol .

    Well ive just just fitted the new rings, i may have spent a little longer than necessary cleaning the grooves on the pistons with a tooth brush I found in the bathroom (turns out it belongs to the missus.)

    il will slot the buggers back in tomorrow and whip the gearbox off and crack on with the timing chains.

    The longest repair in history continues......

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    Quote Originally Posted by autolatry View Post
    Yep. Sick to bloody death of it lol .

    Well ive just just fitted the new rings, i may have spent a little longer than necessary cleaning the grooves on the pistons with a tooth brush I found in the bathroom (turns out it belongs to the missus.)

    il will slot the buggers back in tomorrow and whip the gearbox off and crack on with the timing chains.

    The longest repair in history continues......
    Just don't tell her she might not notice ,keep us posted on your progress.

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    Well upon reinstalling the pistons I have fooked 2 sets of rings and possible a piston as I have gouged the sh*t out of the side of it.

    Got the other 4 in ok though . Lol.

    Anyone want to buy the b*stard car for spares ?

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    Quote Originally Posted by autolatry View Post
    Well upon reinstalling the pistons I have fooked 2 sets of rings and possible a piston as I have gouged the sh*t out of the side of it.

    Got the other 4 in ok though . Lol.

    Anyone want to buy the b*stard car for spares ?
    Not good bud how did you manage that I used t use feeler gauges a slide the rings up them.

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    I did it using the compressor tool and I have tried to force the piston down it into the cylinder. Just inexperience I suppose. I should of stopped as soon as I felt resistance but I thought just a few more taps would do it.
    The others went in ok.
    I assume the piston is knackered now as it has a deep scratch near the top.?

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    Quote Originally Posted by autolatry View Post
    I did it using the compressor tool and I have tried to force the piston down it into the cylinder. Just inexperience I suppose. I should of stopped as soon as I felt resistance but I thought just a few more taps would do it.
    The others went in ok.
    I assume the piston is knackered now as it has a deep scratch near the top.?
    I would probably buy a new piston's however the rings are really what compression depends on but with all the work and money you have spent it would be a big problem and a lot of work to rectify later.

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    the damage......

    think im going to file it down and put it back in (with new rings obviously) as its getting sold once its running again.piston.jpg

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    Tread carefully as you don't want to scrape or score the bore

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    I was thinking if its totally smooth it would be OK...well thats the thinking. Ive just orderd some new small files to do the job.

 

 

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