repair freeze plugs?

Randy Grein randygrein at
Sun Feb 8 10:02:20 PST 2009

I've done the same to my streetbike - didn't think that the former  
owner had track prepped it. I did have them come loose a second time,  
so sealed them in - red locktite, IIRC. Alternative would be to  
replace them; they are intended to provide an interference fit with an  
initial crush and may not spring back enough to re-insert.

Oh, and you may end up with oil in the cooling system, which requires  
a bit of flushing to get all the way out. Cleaning the coolant out of  
the oil system is easier - drain it all, fill fresh, bring it up to  
temp and drain again. There may be some scraps of foam left on top,  
but it will evaporate quickly with use.

Randy Grein, WMRRA #41

On Feb 8, 2009, at 9:52 AM, Patrick Mullen wrote:

>> I think my motor just blew it's freeze plugs. we've had a spell of  
>> bone-chilling weather here in DC recently (10F) and now I've got a  
>> good amount of fluid all over the place.
> When my freeze plugs popped, it was a very clean affair.  If you
> consider coolant througout the motor clean.  The freeze plugs, at
> least the ones I popped, are at the top of the heads.  They can be
> pushed back in using an appropriately-sized socket as a punch.
> If you popped something on the outside, I don't know what it is and I
> can't help you, sorry.  :)
> ~Patrick
> -- 
> 2003 Triumph Sprint ST
> 2004 (race) / 2001 (street) Suzuki SV650
> 2000 Yamaha WR-400
> 1975 Harley FXE1200

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