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Do not attempt to used any stop leak or similar. That just plugs everything.
Actually, I disagree.
First of all, I'd never dump it in a customer's car, because if they're paying me to fix their vehicle, they expect me to FIX it, not just put a band-aid on it.
That said, I've used it on occasion on my own vehicles. Specifically, I had an older pickup that I rarely used (rarely, as in maybe 500 miles per year) that had some TINY cracks in the radiator and I didn't want to spend the money to replace it. The sealant worked fine.
The only product I ever use is SilverSeal. It's an entirely different product than the dark-brown glop a lot of people dump in their cooling system.
First of all, I'd never dump it in a customer's car, because if they're paying me to fix their vehicle, they expect me to FIX it, not just put a band-aid on it.
That said, I've used it on occasion on my own vehicles. Specifically, I had an older pickup that I rarely used (rarely, as in maybe 500 miles per year) that had some TINY cracks in the radiator and I didn't want to spend the money to replace it. The sealant worked fine.
The only product I ever use is SilverSeal. It's an entirely different product than the dark-brown glop a lot of people dump in their cooling system.
I once owned a 1950 Chevy Pickup truck with a 6 cylinder engine that developed a head gasket leak from overheating {broken hose}
I replaced the hose and found the head gasket leak
To be sure, it's a crap-shoot. Sometimes it works - and if it does, great!
The sad truth is that a lot of people are looking for a miracle in a can, and there is no such thing.
I once had a Pontiac Firebird w/400 cu. in & a 4 on the floor.
The trans syncros must have been starting to go shabby, probably from drag racing and banging 2nd. gear a lot, so I drained the old lube out of it and put a Lucas additive into it instead, and it worked great for a long time, but I stopped racing it too.
Some things work, some things don't.
I'd heard that GM put aluminum heads on V-6's and were notorious for head gasket leaks, and GM's fix was their brand of stop leak. Just what I've heard.
I once had a Pontiac Firebird w/400 cu. in & a 4 on the floor.
The trans syncros must have been starting to go shabby, probably from drag racing and banging 2nd. gear a lot, so I drained the old lube out of it and put a Lucas additive into it instead, and it worked great for a long time, but I stopped racing it too.
Some things work, some things don't.
I'd heard that GM put aluminum heads on V-6's and were notorious for head gasket leaks, and GM's fix was their brand of stop leak. Just what I've heard.
Yeah, some things are easy to explain. If a tranny's pump is getting worn & a bit weak, a little thicker fluid (infused with Lucas) can provide higher pressure and a bit better performance. Nothing magic about it - it's just fluid mechanics. But people shouldn't be fooled into thinking the tranny is better than it is.
Regarding aluminum heads (and sometimes aluminum blocks), engineering has come a LONG way!
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