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These pliers are fantastic value for money; they're strong yet light to use and carry the pistons rings over the piston easily, without fear of breakage. I've always taken piston rings off by hand and carefully replaced them after cleaning out the grooves, but on more than one occasion I have broken them. My latest car, which is an EVO 8 MR 320 started running really rough, as though it was running on three cylinders. Naturally I thought it might be a plug or at the worst a valve not closing properly. Once the cylinder head was removed I noticed that several valves weren't fully closing due to their seats being slightly burned (common on these engines) so I stripped the head of it's cams and valves and re-lapped them all back into their seats. Having completed the task I then put the head back onto the block and started to bolt it down, when a weird feeling came over me, I can't really explain it. Number 3 cylinder was giving me a pressure reading of only 25psi and should have been at least 130 - 135psi, this feeling made me stop and remove the bolts I had put in, remove the head and proceeded to remove the sump pan instead. After removing number 3's bearing cap I pushed the piston out of the bore, to my dismay and surprise the piston fell apart, only the rings were holding it together! Now I had a choice to make; do I source one piston or buy a new set? I opted for one set and some new con-rods too, including new big end bearings and main bearings with front and rear oil seals. I didn't realise the sheer amount of work I had to do in order to remove the crankshaft! Having taken me days to get the engine out and stripped, I also found that my clutch was almost burnt out. It's now been a few weeks and the engine is back in with a new paddle clutch, new bearings, pistons/rings and timing belt etc. The rings were a pain as they were racing piston rings, which are much harder than standard and not as flexible. If I hadn't had these pliers I wouldn't have had a chance of replacing the rings, they've served me perfectly. All in all I can say that if you are in a similar state whereby you need to replace piston rings I can honestly say this; I've used mine and they did the job admirably and without fear of ring breakage as you are expanding the entire ring without putting stress on just the opposite side to the gap. I can guarantee you that you will NOT be disappointed! Note: open the ring so it 'just' clears the piston skirt and then lower it into the groove, as opposed to over-stretching the ring, which in any situation isn't a good thing. Hope this helps someone :)Read full review
Verified purchase: No
OK these pliers are cheap and probably work OK at the top end of the size range. However, my piston rings are 62mm - well within the range, but I had to file the 'jaws' to get the ends close enough to the piston, to get enough of the rings to engage in the pliers not to slip out when removing. After this, they work OK...
Verified purchase: Yes | Condition: New
This tool is not good for my 650cc twin piston bike. The rings have to be spread too far apart to fit in this tool, as thicker rings don't fit. Ring broke and I ended up using bits of card and sliding the rings on by hand. Be warned this tool is low quality
Verified purchase: Yes | Condition: New
Well worth the money did the job a treat!
Verified purchase: Yes | Condition: New
Verified purchase: Yes | Condition: New