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| freeing stuck rings https://www.ausmini.com/forums/viewtopic.php?f=2&t=69872 |
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| Author: | Gadgets mini [ Fri Apr 01, 2011 4:44 pm ] |
| Post subject: | freeing stuck rings |
Hi all i have done a compression test on my 1098 here are the results CYL Dry Wet( wd40 sprayed in) 1 115 115 2 115 120 3 120 120 4 50 120 Seems i may have a stuck ring causing the blowby what are the old tricks to solve this with out pulling the beggar out if there are any?? i have heard something about using ATF or is that a con?? many thanks in advance Gadgets |
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| Author: | Monaco [ Fri Apr 01, 2011 4:50 pm ] |
| Post subject: | |
 Those readings are all low. But the % differentiation is ok (with the WD40). You may have a busted ring!
I have used the two bottles of engine flush for stuck rings and it worked well! Not sure I know the ATF one! Sounds more like you need to Wynn's Engine Rebuild! |
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| Author: | GT mowog [ Fri Apr 01, 2011 5:24 pm ] |
| Post subject: | Re: freeing stuck rings |
Gadgets mini wrote: Hi all i have done a compression test on my 1098
here are the results CYL Dry Wet( wd40 sprayed in) 1 115 115 2 115 120 3 120 120 4 50 120 Seems i may have a stuck ring causing the blowby what are the old tricks to solve this with out pulling the beggar out if there are any?? Gadgets With numbers like those, the quick and successful trick is new rings, probably along with new pistons and a re-bore..... |
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| Author: | Gadgets mini [ Fri Apr 01, 2011 5:53 pm ] |
| Post subject: | |
thanks guys looks like a rebuild is inevitable 
BTW what should the compression rates be out of interest?? and how much would be looking at ( a ballpark figure) for a rebore, new pistons rings n bearings assuming the block is okay |
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| Author: | Morris 1100 [ Fri Apr 01, 2011 5:55 pm ] |
| Post subject: | |
My 1100 has had around 120 - 125 for the last 12 years. |
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| Author: | VulcanBB18 [ Fri Apr 01, 2011 6:11 pm ] |
| Post subject: | |
#4 dry certainly is a bit of a worry. Use much oil does it? Have you shined a torch in the plug hole and had a look around? Sometimes you can see the problem - my 850 came with a very tired Morris 1100 engine, used to smoke like a chimney, when I looked down one bore with the piston near tdc I could see a chunk of the crown missing near the edge! Yeah that engine got removed quick smart, it never did die on me though... ... but when pulled down most of the top rings fell off the piston in pieces, if they weren't fused in the ring lands... 
cheers, Jacob |
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| Author: | GT mowog [ Fri Apr 01, 2011 6:27 pm ] |
| Post subject: | |
VulcanBB18 wrote: I could see a chunk of the crown missing near the edge!
cheers, Jacob Ha! Lightened and balanced! |
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| Author: | Monaco [ Fri Apr 01, 2011 6:27 pm ] |
| Post subject: | |
Gadgets mini wrote: BTW what should the compression rates be out of interest?? and how much would be looking at ( a ballpark figure) for a rebore, new pistons rings n bearings assuming the block is okay 150 to 170 is good, what you want is balance though (maybe no more than 10%). As Morris said, you can have some cars with low readings but balance and they seem to go for ever.....but not with one cylinder reading like your number 4! |
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