Recommissioning a 480: 7. Bonnet foam
Posted: Tue May 17, 2022 4:51 pm
Part 1 is under ‘Secret Life’.
Another common problem, is the sound-deadening foam under the bonnet turning to dust. I put an old sheet across the engine, and scraped off the remaining foam, leaving the metal layer in place, and reattached the earth wires. This is needed to reduce radio interference, as it is a plastic bonnet. I cut cardboard templates based on the metal layer, and wiped the metal with white spirit. Replacement foam, 25mm thick, was bought from eFoam.co.uk and is called Pyrosorb-S Class 0 Acoustic Foam. It is self-adhesive, but for good measure I put some contact adhesive round the edge of each metal layer. I have covered a few hundred miles now and it has stayed in place. I should say that the company was suggested elsewhere on the forum, but it did not sound like it had been used at the time.
Another common problem, is the sound-deadening foam under the bonnet turning to dust. I put an old sheet across the engine, and scraped off the remaining foam, leaving the metal layer in place, and reattached the earth wires. This is needed to reduce radio interference, as it is a plastic bonnet. I cut cardboard templates based on the metal layer, and wiped the metal with white spirit. Replacement foam, 25mm thick, was bought from eFoam.co.uk and is called Pyrosorb-S Class 0 Acoustic Foam. It is self-adhesive, but for good measure I put some contact adhesive round the edge of each metal layer. I have covered a few hundred miles now and it has stayed in place. I should say that the company was suggested elsewhere on the forum, but it did not sound like it had been used at the time.