Re: [Chrysler300] 413 Welch plugs

On Oct 21, 2017, "John Grady jkg@xxxxxxxxxxxxxxxxx [Chrysler300]" <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:

I think to do this right you have to machine the block to remove the lip the flat stock discs sit on . Just putting GM style cups in the holes does not work correctly . They need to go in flush all the way . Maybe you did this machining? If not they will not grab as designed .precision size of hole too ?
I am a big believer in the hot heads aluminum plugs held with a stainless steel bolt and toggle bolt like strap . This cannot come out . The bolts from hot heads are slightly too short aggravating putting them in , unbelievably so , inside parts can drop into water jacket . You are done for . I had a bare block got the toggle bar out of top of block. Get 1/4 longer bolts . Made for 392 , may be same size as B , and a bolt in . The o ring sits on the block lip. Which must be clean . lost a disc one on first trip on 392 ,huge hassle you get 2 minutes to boiling in head. very tricky to get in right with stock , but stock works. A skill issue . No one does this in 2017, they do not have the experience . But stock rusts too . On heads maybe cups are a good answer ? Machining them anyway at a rebuild.
Bottom line hot heads bolt in plugs end this problem on block. And can be done without machining . Need to check if 413?and 392 same size . A good machinist can make this too . John G
Sent from my iPhone

> On Oct 21, 2017, at 5:41 AM, Ronald Kurtz mark6268@xxxxxxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
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> Copper cup plugs are available from Summit Racing . I installed them on my '64 361.
>
> Best,
> Rom Kurtz
> E #292
> ------------------------------------------
> On Fri, 10/20/17, Ray Jones 1970hurst@xxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
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> Subject: Re: [Chrysler300] 413 Welch plugs
> To: "Richard Vitek" <rpvitek@xxxxxxxxxxxxx>
> Cc: "Intl 300" <Chrysler300@xxxxxxxxxxxxxxx>, "Ray Jones" <1970hurst@xxxxxxxxx>
> Date: Friday, October 20, 2017, 11:27 PM
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> Not sure why you want
> to use disc rather than cup plugs. Cup plugs are more
> foolproof, and are easier to set and keep in place.
> Back in the day when I replaced
> any of mine, I used Marine Brass cup plugs.413 is a very popular
> engine, so they should be readily available, in steal or
> Brass.
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> On Fri, Oct 20, 2017 at
> 3:47 PM, 'Richard Vitek' rpvitek@xxxxxxxxxxxxx
> [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx>
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> Anyone know of a
> good source for Welch plugs (expansion/freeze/core),( disc,
> not cup type,) for an early 413? Counterman at NAPA and some
> other stores unable to help.
> Thanks. By the way, are
> these sized nominally the same as the cup type for the same
> size bores?
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> --
> Ray
> Jones. Y'all come on down an see us. Ya
> hear?
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> ------------------------------------
> Posted by: Ronald Kurtz <mark6268@xxxxxxxxxxxxx>
> ------------------------------------
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