Anyone ever see the bumper rubber melt?

[Loy]

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Took it for a drive and parked it. It started melt from the sun!

What kind of rubber/urethane is this? Lol.

[Bwk2000]

Damn … Looks like that was made from tar, not rubber.

[Gregs672000]

Whaaaat? I don't have them, but I've never seen that happen before. Where do you live, Death Valley?

[Loy]

It was a mild 70s today. It came with the car… maybe it was cheap urethane. Iono now I got to clean it up…

I think it was the reflections or something.

[rwmann]

Looks like a repair gone bad.

[tjp]

I've seen NOS tie rod and ball joint boots do that in the bag (never installed). I wonder if the bumper rubber is a similar thing?

[redroadster]

There's several YT sites that follow the celestial mass ejections , the magnaspere keeps most of the particals off us , a few days ago The satellite image of this seemed to show the magnaspere fading , bet that the reason
I have seen the heater box pipe seal tacky almost goo

[Nissanman]

Nah! Stray gamma ray is what did it

[Loy]

Was it aliens?!?

[jrusso07]

Never seen this before. I would guess it's a combination of age, heat and some solvent like ammonia or gasoline. Looks to be only on the leading edge so maybe you drove through a puddle of gas and splashed up onto the rubber?

[Loy]

Probably so. I took it off both sides and cleaned all the mess up. I'm contemplating if I should replace them and wondering if it'll happen again.

There is a hole now that I have a poor fitting rubber grommet in there for now.

[bajaroadster]

Any possibility that the exhaust is somehow heating up that side of the bumper? Is it just the one side melting or both? Seems like a long shot but .....

[Loy]

I thought at first but the bumper was cool.

[Bwk2000]

I've seen NOS tie rod and ball joint boots do that in the bag (never installed) …

Funny you should mention that Tim. Someone here is selling New Old Stock Datsun ball joints that have been sitting in the original wrapper and box for 40+ years. What the hell were these things made of back then?

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[redroadster]

Looks so much like black RTV, like it's supple & got oil in it
your not kidding right ?
And the BJ Pic...oil eats rubber slowly
Nissan 3" rubber tubes to the air filter , turbo rubber tubes were tough to R&R , one tech started greasing them slightly Instead of using brake clean .... they went soft 18 months later and we had to fix