M y 90 aero 3.0 heads are leaking front and back freeze plugs. I think back ones are preety accesable from inside. Has anyone out there changed before and how hard is it . I changed block plugs. What size are head plugs?. THANKS TERRY

 

Yes, I did it twice. 1 hour job in unusual for human pose..... Head down, *** up..... :-))

 

there is a head part # on each head, several different heads used on Aero 3L over the years.

take the casting # to you local parts store, they will need to pickout right size. or you can measure them.

I would use the brass replacements if avail., last far longer. coat the steel with a sealant such as Permatex Super 300 and drive in.

there are two large ones in the back of the block under the bell housing, common leakers
http://www.babcox.com/editorial/ar/eb90450.htm

 

Are the two in the back on the block I can see the two on the heads after removing cover they seem pretty easy to get to considering everthing. terry

 

yeah Terry, you are wright. Use tought sharp tool to brake throught them and pull away. Install new with sealant, soft metal pice and small hummer.

 

Thanks Pablo I will try and replace have you replaced front ones on the heads . tery

 

1986/91 Aerostar 3.0

6-D7AZ-6026-A .. Core Plugs-Cup Type ~ Use in Block ~ 1.50" O.D.

4-E6DZ-6026-A .. Core Plugs-Cup Type ~ Use in Head ~ 1.26" O.D.

 

Thanks numberdummy. terry

 

Ah, nice to see correct terminology. These were never meant to save an engine from cracking during freeze up. They are a necessary part of the block casting process.

Now if we could be like the British and call Shocks dampeners, especially since the springs are the real shock absorbers.

What else is mis-named like this?

 

Well, this terminology is correct, but freeze plugs really may save engine from cracking, but I know nobody who use water in aeros here. Too cold!

 

TallPaul,

How about binders for brakes?

 

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TallPaul,

How about binders for brakes?
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LOL!!!!!!



Well, about front ones. Easy to do too. But U have to remove alternator and PS-pump.

 

I like binders. Almost sounds like Wisconsin talk. Over in wisconsin a drinking fountain is called a bubbler and a traffic light is called a "stop and go."

Of course we could get really nit picky and argue whether it's an engine or a motor. Strictly speaking motor is applicable to an electric motor, not an IC engine. But with Motor Magazine, Motor Trend, etc. who can argue?

What is the topic here anyway, oh yeah, freeze plugs. Well as long as you are replacing some core plugs, consider installing one of those block heaters that fits into the core plug hole. Might be nice to get some warm winter starts if you are in a cold area.

 

How about crossfire for trafic light? Ore learner-driver for student driver? Ore 5th wheel for hicth? Propeller shaft ore drive shaft? How is correct?

 

I wiki'd "freeze plug". Some interesting stuff there. True freeze plugs need to be strategically placed to allow for expansion. That doesn't necessarily agree with the casting (plug) requirements of block and head fabrication.

http://en.wikipedia.org/wiki/Freeze_plug

PS: I second the heater plug idea. My Mercedes diesel had one. Very handy. I used an inline thermosat switch with the extension cord so that it would only come on if it got really cold.