Sealant

[John Kinnane]

Hi Eric first let me thank you for sending the vid on adding sealant to coolant. I would not do it but I have seen
other mechanics use it I did think at the time it seem to be not a good idea

I have seen on You Tube a well known person of 46 years in the industry?
Thank you once again Eric your knowledge is greatly appreciated
Johnno

Topic

[Bill]

I have been in the industry for 46 years also and I don’t recommend using sealer at any time.

[John Kinnane]

banana: well that’s good, it certainly opened up the discsion. Now that the
general consensus is don’t use it or you could be asking for trouble.
I would like to apologize for the way I write but my arthritis stuffs things up a bit.
To Eric thank you once again and being able to figure out sometimes what I mean.

Johnno

[Jamie]

Avoid the stuff at all costs. The issue with most sealers is that they seal really well. Not only will it plug a leak, but can also plug smaller coolant ports in the head/block, as well as in heat cores.

That being said sometimes you might be in a situation where you have to use it to get your sorry car home. Just be prepared to drain the coolant and really flush the system out well while you fix what was leaking. I’ve been down this road personally. It got me home, but when it was time to get to work replacing the head gasket I found a nice thick coating of sealer on everything, aswell as most the smaller ports in the coolant jacket were now solid and needed cleaning out with tiny drill bits. Good fun night that one.

[Author]

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