Drill that muffler!

[Andries ter Hennepe]

Dear all,

just got the new mufflers for our '65 conv. in. This is the third pair in 6 years. They always rust through in the same spot: lower insides of the muffler bodies. Our '99 Grand Cherokee has a hole drilled in its muffler standard from the factory to let condensation out. This works really well. Anyone with experiance in drilling watering holes in their Corvette-mufflers?

As always:

thank you in advance,

Andries ter Hennepe

[Clem Z.]

Re: Drill that muffler!

any car i owned if it did not have a weep hole for the moisture i drilled a 1/8" hole on the lowest output side of the muffler. also if you still have a heat riser valve,it add to the problem because it keeps the exhaust from passing out that muffler till it opens casing it to run colder.

[Andries ter Hennepe]

Re: Drill that muffler!

Well Clem, thats clear then! Thank you for your answer and out comes the drill. Hope this time they (the mufflers) will live longer.

[Clem Z.]

correction on drill size

i drill a 3/32" not 1/8" diameter.

[Wayne K.]

Re: correction on drill size

Clem,

Due to the angle that the mufflers hang on a C2 shouldn't the hole be drilled in the lowest input end of the muffler ? Water runs better downhill.

[Clem Z.]

Re: correction on drill size

sounds correct to me as i have only drilled mufflers that were level.