Question about Mantis Gas Mini Tiller/Cultivator, 2 - Cycle

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How do you compress piston ring in Mantis tiller to re-install

Is there a "shade-tree mechanic" trick to compress the piston ring so the piston can be inserted in the cylinder? Commercial compessor tools seem to be too large to fit in space available. Would a hose clamp work? My tiller is an SV-5C/2.

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I make one with tin snips and a tin can or sheet metal from an air duct. Make sure you have the ring with the right side "UP", the beveled edge (if there is one) goes up or toward the head.

Posted on May 27, 2010


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Posted on Jan 02, 2017


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2 Answers

What is a cylinder compression how much do it cost to replace it

If you have low (or no) compression in one or more cylinders, it can be due to broken/bent valves or valve seats, bad or broken piston rings, or mechanical timing way off. The cost to correct is very dependent on the specific cause. Best case is mechanical timing is way off (this will show up as low/no compression in all cylinders), assuming no other mechanical damage was done. Worst case is engine rebuild or replacement.

Aug 22, 2017 | Cars & Trucks

2 Answers

Where is the piston o ring

The term "o-ring" usually is in reference to some sort of rubber or neoprene ring that serves as a gasket or seal for something. Pistons do not have o-rings, but they do have piston rings. There are usually three or more rings on each piston. They are split rings of steel that are inserted into grooves of the outer circumference of the piston. They seal the piston to the cylinder walls and prevent the air/fuel mix from getting past the piston into the crankcase and prevents the crankcase oil from being sucked into the cylinders. With the pistons rings, the cylinders would not have sufficient compression to do their job effectively. Rings can and do break from time to time. This can cause degradation of performance or in the worst-case scenarios, serious cylinder damage.


Feb 14, 2016 | Cars & Trucks

1 Answer

Excessive white smoke from tail pipe

White smoke:

White smoke is caused by raw, un-burnt fuel passing into the exhaust stream. Common causes include:
·Incorrect fuel injection timing
·Defective fuel injectors
·Low cylinder compression

Low cylinder compression may be caused by leaking valves, sticking piston rings, ring wear, cylinder wear, or cylinder glaze. When white smoke occurs at cold start and then disappears as the engine warms up, the most common causes are fouling deposits around piston rings and/or cylinder glazing.
Continuous evidence of white smoke indicates a mechanical defect, or incorrect fuel timing.

Jan 25, 2015 | Chrysler PT Cruiser Cars & Trucks

2 Answers

How many labor hours should it take to change the valve seal?

Can't tell you exactly...but its not a small job. Depending on the shop, and how they go about it, it could take 7 or 8 hours or it could take more (or less if its an older, simpler engine). Basically they have to strip the engine from the top down to the heads, which in and of itself can take hours (removing the things you see when you open the hood is only about a quarter of the battle...they also have to strip down the timing system, remove the lashes, lifters, cams everything down to the point they have access to the valve stems...this assuming they have the tools and experience to do it without removing the heads...possible but complicated on an Altima). Once down to this point, its a matter of moving around the engine, pulling each piston to TDC, compressing the cylinder, compressing the valve springs, pulling the retainers (and not loosing them down inside the cylinder or else the heads have to come off any way), working the old seal out, new one in and reversing the whole thing...then move on to the next valve. Either 2 or 4 valves per piston, 4 to 8 pistons per engine...the time adds up quick. Its the reason us shade tree mechanics learn what we learn when we learn it. Parts might run you $100 or less, but 5 or 6 hours of mechanic labor might turn it into a $700 or $800 job or more depending on the engine. Hope that helps in some way and good luck!

Jun 17, 2014 | 2001 Nissan Altima

2 Answers

I have a Campbell Hausfeld commercial air comprssor that has a moisture filter but I get a lot of oil in the hose which gets all over my air tools and clogs up my media blaster. What's going on an

If you are getting oil from the air pump in your hoses and tools your problem is in the cylinder/piston area. The piston on air pumps is very much like a car piston, depending on what model you have it has compression rings and oil scraper rings. If any of these are damaged or if your cylinder(s) is badly scored oil will get by the piston and be forced out with the compressed air to your tools. The only repair is to take the head and valve plate off and find out what parts you need to replace. If the cylinders are lightly scored they can be honed out but you can't machine them out as Campbell Hausfeld doesn't make oversized rings or pistons.

Feb 19, 2012 | Campbell Hausfeld Air Tools & Compressors

1 Answer

I cant seem to get the piston rings into the cylinder head they are fully compressed

use a ring comperessor, special tools, that u could buy in any tool dealer!

Apr 11, 2011 | Yamaha YZ 250 Motorcycles

1 Answer

I have 2004 dodge 2500 with 5.9 cummings it has excessive blow by and blowing oil out slobber tube what is my problem


I have 2004 Dodge 3500 w/ 5.9 Cummins , at about 80,000 miles I had excessive oil fumes coming from underneath the hood of the truck . Fumes came from the slobber tube . Took it to the dealership . At first they replaced the fuel rail . Problem got worse . Took it to the dealership again , Oil pan dropped , engine head removed , fuel tank checked , at my cost at first . Results , number one piston top pitted like some took a pick axe to it , parts of piston rings missing , number six piston top clean , but parts of the rings missing as well . This took 17 days for the dealership to find out and to agree to have the engine repaired under warrenty . 14 more days to order and install new engine and turbo . 31 days in total to repair an engine that is defective . Two other engine were in the shop at the same time with the same problem . I now have 100,000 miles on the truck and only 20,000 miles on the new engine with the signs of the oily fumes showing up again . So , rings crack , pieces make their way out of the engine block thru the turbo , back pressure in the crank force the oily fumes out of the slobber tube . That has been one of the problems I have experienced with my Dodge Ram . I am not impressed with my 2004 Dodge , however , my 1995 Dodge Ram was great . Is the new Cummins Engines a true diesel with a replacable cylinder sleeve ?

I hope that this is not your problem , but the fastest way is to check compression in each cylinder and crank case pressure .

James , Shade Tree Mechanic

Jan 11, 2010 | 2004 Dodge Ram 2500

1 Answer

2000 dodge durango with 5.9L. AC compessor clutch smoked, but still turning and AC still cold. Is the clutch assembly available seperate from the compressor and how difficult is this to change by average...

Yes the assembly is available but you will need a clutch pulling and a clutch installing special tools. They might be rentable, if not I dont think they cost alot.Its not a bad job.
You might want to read up on the job.Dont forget the gap spec.

Sep 21, 2009 | 2000 Dodge Durango

1 Answer

I had to replase the piston and fogot how to put it back togther

Put the piston in with the mark on the top of the piston facing the exhaust port of the cylinder. put one circlip in the piston in the bore seated correctly in the groove. place piston over rod facing correct direction and insert wristpin into piston and through the rod needle bearing in the top of the rod. insert other circlip and seat correctly in groove. install compression rings with letter or any markings facing up. markings usually located at end gap on either side. install oil ring with straight ring on top squiggly ring in center and straight ring on bottom all in the same groove which will be the lowest groove on the piston.stagger all the ring end gaps. do not let all the gaps line up. install base gasket on engine case. clean everything and make sure everything stays clean. slide cylinder over piston and compress rings with fingers and finesse cylinder over piston. do not force. put nuts on studs and tighten to spec in service manual. install head gasket correctly and put head on and put nuts on studs. tighten to spec. reassemble rest of motorcycle and get hurt! have fun

Jul 28, 2009 | kawasaki KX 250 Motorcycles

2 Answers

How to compress the caliper cylinder

The piston doesn't screw in, that is usually for vehicles with rear disc brakes that incorporate the park brake in the caliper. The correct way for yours is to open the bleed screw and compress the piston. The most common (shade tree) way is to simply use a screwdriver and pry against the rotor pushing the piston back. Some pistons are ceramic so be careful not to crack it. If you pry between the old pad and rotor you should be ok.

Apr 21, 2009 | 1994 Eagle Vision

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