Author: AKeson

Cosmetic Repair of Fiberglass Arctic Cat Snowmobile Hood

Following the repair of the inside of the fiberglass hood from the Arctic Cat snowmobile, it is time to tackle the outside portion of the repair. The outside of the hood had gelcoat that had been damaged, and is in need of a cosmetic repair.  The hood had been prepped with a grinder to remove loose pieces and provide an abraded surface that will have good bond strength. The first step is to remove the tape that had been limiting resin intrusion.  The resin was well on the way to curing prior to the tape being removed. Next was to begin the actual repair.  The area was taped off to limit the resin and filler getting onto the neighboring gelcoat.  The tape was used more as a dam than as a flat edge. The repair material was a filled epoxy resin.  The first step is to apply the pure mixed epoxy to the the substrate.  This is done prior to the application of the filler.  It helps with the bonding process to have some pure epoxy between the filler and the fiberglass. Then a batch of epoxy filler was mixed into a thick paste to be applied to the repair areas.  Part of the challenge is to fill the voids to be level with the existing gelcoat.  If they are too high, they will need to be sanded off. ...

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Structural Repair of Fiberglass Snowmobile Hood

The damaged snowmobile hood is prepped and ready for a proper repair with new fiberglass and epoxy resin. The hood had already been ground to promote adhesion.  Then it was cleaned to remove contaminants. The inside of the hood will be repaired first.  The repair will be completed using fiberglass reinforcement and epoxy resin. To keep the resin from leaking through to the other side, I used masking tape to cover the crack and other holes, applying it to the backside of the work areas. The damaged hood was out of shape, and it needed to be pulled back to being straight.  The corners of the hood were cracked and the center section of the hood was moving around.  Not wanting the repair to permanently alter the shape of the hood, a pipe clamp was used to pull it back into the proper shape. The first part of the process was to mix resin and cut fiberglass.  Mixed epoxy resin was applied to the repair area to wet it out.  Then a couple layers of the fiberglass random strand mat was wetted out and applied.  Following  of the glass strand mat, the 1708 was cut out to cover the general area.  The 1708 was wet out and and applied.  Then another layer of glass strand mat was applied to the general area that was ground out. An inexpensive bristle...

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Grinding the Arctic Cat Snowmobile Hood

Prior to adding resin and reinforcement to the Arctic Cat Snowmobile Hood, we need to grind the areas in need of repair.  Grinding will remove the damaged resin and glass, including problems from the past failed repair.  This allows us to bond new resin and fiberglass to the existing good material.  For repairs to be successful, proper bonding is extremely important.  Removing contaminants and loose/damaged glass, resin, and gelcoat is one of the most critical steps in assuring a successful repair. The repair will include both the inside and outside of the hood.  The inside is a structural repair and the outside is mostly a cosmetic repair. On the inside, I used a flat-disk right angle air grinder to remove the necessary material so that the repair could bond onto clean, original fiberglass. Proper safety precautions must be observed.  Gloves, glasses, and ear protection are all necessary.  Skin protection  is advised, as the dust can cause itching and irritation.  It is also very important to not breathe the dust. This is a messy job.  Lots of fiberglass dust is generated during the process of removing material to get down to a good bonding surface. These two corners of the snowmobile hood were cracked, repaired, and cracked again.  The grinding had to remove most of the failed repair and get down the bondable fiberglass.  It is important to remove shiny...

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Failed Repair- Arctic Cat Snowmobile Hood

Snowmobile engine hoods are susceptible to damage.  The hood is at the front of the machine, which increases the likelihood for impact.  The hood covers the engine and is hinged to allow access.  This exposes the hood to engine heat and vibration.  There hood also experiences forces where it is attached to the hinge connection. This 1972 Arctic Cat Cheetah 440 snowmobile had seen damage across the front of the engine hood.  Cracked at the corners, the hood had been repaired with fiberglass and polyester resin in the distant past.  This old repair included 2-3 layers of plain weave cloth tape without any random strand fiberglass mat included in the layup. The original repair was a structural repair on the two corners of the hood leading away from the hinge attachment holes.  There had not been an attempt at any cosmetic repair to the front side. A damage survey like this only leads to one thing- a repair project! This can be repaired with a few basic tools and supplies.  Click here for the next...

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You Need This Tool – Episode 37 | Tools For Making Carbon Fiber

If you are starting out in the world of making parts from carbon fiber, you will need tools and materials to complete the process and have a successful outcome with your composite parts. The following is an introductory video for the materials that you will need to complete the vacuum bagging process with carbon fiber and eopxy materials. From Youtube The Fab Forums I hope this helps some you guys out that are looking to try your hand at making some Carbon...

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