Coolant - how long is too long?

[ascension]

Been shopping for a 200 series for a few weeks now - man is it hard to find clean examples that haven't been neglected.
Seems transmission d&fs are alien to lx 570 owners....

Anyways found one down south that checks out (ahc every 60k, tranny d&f at 60k and 100k, diffs and t-case flushed frequently), but the only hair in the soup is that coolant wasn't changed until about 150k. They replaced with a new radiator at the same time so there's that.

I've been going a ton of research on the shortcomings with this engine and overdue coolant seems to be a big one - especially considering these early v8s like to blow head gaskets.

They put on about 50k and 4 years since the coolant flush so there's that.
Planning to do a block test with the ppi but wanted to get your guys' opinions.


Thanks!

 

[stonepa]

Should be fine with the swapped radiator. Any water pump leaks?

If I bought it I would immediately do a coolant change. I do them every 50k and you are there.

 

[ascension]

Should be fine with the swapped radiator. Any water pump leaks?

If I bought it I would immediately do a coolant change. I do them every 50k and you are there.

None that I'm aware of so far. Yeah I'd definitely baseline the fluids if I grabbed it.

 

[bloc]

Not trying to muddy the water even more but my 2013 got the coolant swapped on schedule and still popped a HG without ever being run hot. Conversely many others here haven’t had an issue at all.

I understand this doesn’t help much.. but I bring it up to demonstrate this is a complex issue and it’s difficult to really get a bead on the risk vs reward here.

 

[Mingus Dew]

Not trying to muddy the water even more but my 2013 got the coolant swapped on schedule and still popped a HG without ever being run hot. Conversely many others here haven’t had an issue at all.

I understand this doesn’t help much.. but I bring it up to demonstrate this is a complex issue and it’s difficult to really get a bead on the risk vs reward here.

Seems like there is no real downside to doing the coolant every 30k-60k miles but agreed that this is not a proven preventative measure when it comes to HG issues.