[Healeys] 100-4 engine head gasket?

[WILLIAM B LAWRENCE]

If you are going to use a steel or MLS gasket you are going to have to resurface the block and head. They need a finer finish than copper.

Bill Lawrence
BN1 #554
________________________________
From: Healeys <healeys-bounces at autox.team.net> on behalf of Alan Seigrist <healey.nut at gmail.com>
Sent: Tuesday, January 26, 2021 2:54 AM
To: Michael Oritt <michael.oritt at gmail.com>
Cc: Healey list <Healeys at autox.team.net>
Subject: Re: [Healeys] 100-4 engine head gasket?

Hi Michael -

Sounds to me the smart thing to do is put in a steel head gasket because the head was rebuilt not that many miles ago, so I might have a low spot there.  The head is torqued correctly so that's not it.

Best,

Alan



On Mon, Jan 25, 2021 at 10:27 PM Michael Oritt <michael.oritt at gmail.com<mailto:michael.oritt at gmail.com>> wrote:
Probably blown gasket at the 3-4 bridge.  My original head suffered from erosion of the metal at the 1-2 bridge, allowing the gasket to blow.  I had it built up enough to work for a while but eventually replaced the head with a DWR AL model.

Best--Michael Oritt

On Mon, Jan 25, 2021 at 4:55 AM Alan Seigrist <healey.nut at gmail.com<mailto:healey.nut at gmail.com>> wrote:
All -

My A90 just started running weird.  So I took a compression tester and I'm getting (note the A90 is lower compression than the 100):

1 - 135 psi
2 - 135 psi
3 - 60 psi
4 - 60 psi

When I put the compression tester on number 3, I get blow back through #4 spark plug port.  Then when I put it on #4 I get blow back through the #3 spark plug port.

Seems to me it's just a blown head gasket.... am I correct?  as far as I'm aware, these heads usually crack between 2 & 3, correct?

TIA

Alan
_______________________________________________
Support Team.Net http://www.team.net/donate.html
Suggested annual donation  $12.75

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive

Healeys at autox.team.net<mailto:Healeys at autox.team.net>
http://autox.team.net/mailman/listinfo/healeys

Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/michael.oritt@gmail.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20210126/6f7beafd/attachment.htm>