Pressure in the block and head is much higher than at the radiator -
like 30+ psi with a 7 psi cap.? The restriction across the thermostat
housing holds it back from the Rad.? We discovered that when we put a
radiator cap on TOP of the t-stat housing to make the water easy to fill
fully.? Had to plug up the overflow on that one.
As others mentioned, I JB weld any freeze plugs into the block.
Regards, Tony Drews
On 5/3/2018 10:30 AM, DPPI - Mark Craig via Fot wrote:
>
> I have been watching this and am curious why do you?ll have so much
> pressure in the cooling system that it blows freeze plugs out. I have
> run Shelby?s, Mustangs and now Spitfires.
>
> We use a 7-12 PSI cap, that?s not enough to blow a plug out.
>
> Are you?ll using some high PSI cap or some such thing???
>
> http://dieselperformanceparts.com/media/mail/logo_small_dppi.png
> <dieselperformanceparts.com>
>
>
>
> **
>
>
>
> *Mark Craig
> *Diesel Performance Parts, Inc.
> 411 Allied Drive, Nashville, TN 37211
> www.dieselperformanceparts.com <http://www.dieselperformanceparts.com/>
>
> http://dieselperformanceparts.com/media/mail/icon_social_facebook.jpg
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>
> *From:*Fot [mailto:fot-bounces at autox.team.net] *On Behalf Of *fubog1
> via Fot
> *Sent:* Thursday, May 03, 2018 6:39 AM
> *To:* gblake58tr3 at icloud.com; jerryvv at roadrunner.com
> *Cc:* fot at autox.team.net
> *Subject:* Re: [Fot] Cylinder head freeze plug help
>
> I routinely strap that rear plug or lock it in with a 10/32 and a flat
> washer folded in on either side.
> Overkill... perhaps, but that sucker isn't coming out.
> Glen
>
> -----Original Message-----
> To: Jerry Van Vlack <jerryvv at roadrunner.com
> Sent: Thu, May 3, 2018 3:33 am
> Subject: Re: [Fot] Cylinder head freeze plug help
>
> I had one pop out on me at the Sunday afternoon race of the Kastner
> cup at Road Atlanta a few years ago. I was bummed to miss out on the
> remaining laps so figured I did not want that to happen again.
>
> When I pulled the head, I drilled and tapped to 10-32 holes each side
> of the rear freeze plug. After installing the new plug, I installed a
> bar that spans the plug and bolts to the head using the two trapped
> holes. In the center of the bar is a weld nut that I run a bolt
> through to put a little pressure on the freeze plug. Probably over
> kill, but Won?t be popping again.
>
> Sent from my iPhone
>
>
> On May 2, 2018, at 12:30 PM, Jerry Van Vlack via Fot
>
> It goes without saying that you should coat the edges with a good
> epoxy before you bonk it.
>
> JVV
>
> *From:*JAMES GRAY via Fot
>
> *Sent:*Wednesday, May 2, 2018 11:12 AM
>
> *To:*Jack Wheeler
>
> *Cc:*FOT Triumph
>
> *Subject:*Re: [Fot] Cylinder head freeze plug help
>
> Jack,
>
> The old freeze plug was found last night under my catch tank at
> the battery tray. It didn't have much of a ding in it
>
> so I suspect it could have been flattened more/better when it was
> first put in.
>
> Last night I was able to clear stuff as required to drill a 1/2"
> hole in the firewall directly behind the plug.
>
> I already have a length of 1/2" solid round bar, tapered/rounded
> at the end in the hole just waiting for the new plug to arrive.
>
> The round bar runs right under the dash. I'll be able to knock it
> in from the cockpit with a 3 pounder.
>
> The car was running better than ever when it went, compression is
> at 200 psi on all four so at the moment
>
> I don't have any reason to believe there are other problems. No
> evidence at all of water in the oil or cylinders.
>
> However, once the plug is replaced and running again there will be
> detailed inspections once it's back up to running temp.
>
> jim g
>
> On May 2, 2018 at 8:40 AM Jack Wheeler <jwheeler1947 at yahoo.com
>
> Hi Jim. Consider this.? Pulling the head may give you the most
> correct fit, and also may be quicker, all things considered.?
> When I was racing, and had to pull the head at the race track,
> I could get it off and back on, new head gasket, and nuts
> torqued, in under an hour.? By the time you make clearance
> under the dash, and drive the plug in, possibly not aligned
> correctly, I'll bet you will have over an hour invested.? Good
> luck.
>
> Jack
>
>
> PS.? have you determined what caused the freeze plug to blow
> out?? The one time I had that happen at the race track, it was
> the result of a major cylinder head failure.? You may be
> looking at a bigger problem than just the freeze plug.
>
> On Tuesday, May 1, 2018, 8:53:42 PM EDT, Duncan Charlton via
>
> I used one of those expandable core plugs on a BMW 2002 and
> left it in for the next 60,000 miles with no sign of leaks.
>
> Duncan
>
> On May 1, 2018, at 9:47 AM, William T newman
> wrote:
>
> I've used a neoprene plug at the track to get by until I
> could pull the head.
>
> Bill Newman
>
> #44 GT6
>
> ----- Original Message -----
> From: Jim Gray via Fot <fot at autox.team.net
> To: 'Duncan Charlton' <duncan.charlton54 at gmail.com
> Sent: Tue, 01 May 2018 07:44:38 -0400 (EDT)
> Subject: Re: [Fot] Cylinder head freeze plug help
>
> Duncan,
>
> I think that?s where I?m going next, the freeze plug is
> just about in line with
>
> the bottom of the dash or close. The good thing is it blew
> the old plug completely out.
>
> I just need to knock a new one in.
>
> I?m pretty sure I can go under the dash and through with a
> piece of ? or even ?? round
>
> bar about 2? long which I can scrounge at work.
>
> I?ll have to remove some stuff but still better than
> pulling the head.
>
> jim
>
>
> *From:*Duncan Charlton <duncan.charlton54 at gmail.com
> *Sent:*Tuesday, May 1, 2018 5:36 AM
> Jim Gray <toodamnfunky at comcast.net
> *Subject:*Re: [Fot] Cylinder head freeze plug help
>
>
> Can you drill a hole through the firewall and drive it out
> or yank it out that way?
>
>
> Duncan
>
> On Apr 30, 2018, at 6:57 PM, Jim Gray via Fot
>
>
> FoT
>
> I was wondering if anyone has a clever method of
> putting in a cylinder head freeze plug without
> removing the head.
>
> I was instructing at our drivers school this past
> weekend when it blew out.
>
> I may have enough room between the firewall to use a
> short blunt air chisel
>
> but I have my doubts so if anyone has a better one
> please let me know.
>
> Thanks as always,
>
> jim g
>
>
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