79 series cabin noise
Submitted: Sunday, Aug 22, 2021 at 19:24
ThreadID:
142433
Views:
9986
Replies:
8
FollowUps:
8
This Thread has been Archived
JL7T9
So we have been going through a process of eliminating the wind noise today coming from our 79 with 10,000km. during the week I put a post out regarding the roof rack wind noise from the rhino rack platform to see if other people had issues . Today I removed the rack and still getting the wind noise coming in I believe near the A pillar. Without doubt I’ll be the 1st to agree the 79 isn’t the most aerodynamic car with flat windscreen,
snorkel big mirrors ect, and have read all the reviews on 79’s as the tend to have a bit of wind noise. but did have it fully sound detened to help. One of my door seals on the driver side looks a little squashed on the corner but the wind swooshing noise is from both sides. Just asking any other 79 owners about the wind noise in their cab at from around 70+km not sure if it is the Msa mirrors, door seals or if it’s just part and parcel of the brick shaped car. Love to hear if it’s standard on all 79’s as a mate with a single cab doesn’t seem to have issues, I also had the windscreen replaced at 5000km due to a crack with a non genuine. I have read if the polyurethane has sealed properly the swooshing noise will come in. I have taped over the seal to see if it is not sealing properly but still seems to come in. Really just wanted to see if other owners have the same wind turbulence noise.
Reply By: RMD - Sunday, Aug 22, 2021 at 20:41
Sunday, Aug 22, 2021 at 20:41
JL7T9
Obviously the rack isn't the problem if no change. Have you used a piece of thin dressmakers "bias binding, ie cloth tape, and with the windows down, doors closed, have the tape dragged out and in , while passing along the door frame. That will ID where a rubber seal isn't touching much at all. You mentioned "sound detened" ! Do you mean sound deadened?
You also have read, " if the polyurethane has sealed properly you will get noise. I would think the opposite applies, where, If you have had a screen replacement and it HASN'T sealed then noise will certainly be a problem as it is a high pressure area sealed from inside the cab.
I would also
check if the window glass, both sides, are seating squarely in it's Bailey channel. If not and there are unseen gaps at edge of glass OR in the corners there may be a misfit and some filling with a dob of flexible sealant may be sufficient. Wax or grease glass in that area during curing so it doesn't stick shut. Cling film also works. I had a HJ61 and both doors required the window frames slightly bent inward to create proper door seal closure. Slightly that is! Bailey channel also needed repair.
The
snorkel won't help as it does create turbulence at the pillar. Any vacuum created at the pillars will suck out past the door rubbers so attention to detail is required.
AnswerID:
637623
Follow Up By: JL7T9 - Monday, Aug 23, 2021 at 08:07
Monday, Aug 23, 2021 at 08:07
Thanks for the info, I have a couple of mistakes as you picked up. Correct I have the entire car deadened. I will contact the company who installed the new windscreen to see if they can reseal with the polyurethane. In the mean time I will
check the door seal clearance with your technique.
FollowupID:
915706