How to Seal the Small Holes After Removing CNG Conversion?
2 Answers
The safest method is to replace the entire intake manifold. Although this approach involves higher costs, it offers the best results and safety. Alternatively, you can use screws to block the holes in the intake manifold and then reinforce them with sealant.
The holes left after converting from gas to oil must be sealed tightly. I've handled quite a few of these jobs before. Typically, these holes are drilled into the fuel tank or the car body to install gas cylinders or pipelines, and after removal, they need to be sealed with specialized materials. I first clean around the hole to ensure there's no oil residue or rust, then fill it with a high-temperature-resistant sealant, such as automotive epoxy, which can withstand engine heat. If the hole is relatively large or was originally used for bolts, I'd recommend reinforcing it with a rubber plug and glue to prevent future loosening or oil leaks. Preventing leaks is crucial—otherwise, oil and gas seepage can cause odors and may corrode components. I've also seen some cars experience fuel leakage due to poorly sealed holes, so it's best to have a professional mechanic inspect the system's integrity to ensure the repaired holes won't affect driving safety. During regular maintenance, it's also a good idea to check the sealing condition to prevent small issues from becoming major problems.
