[TR] TR4A head gasket, 87 mm cylinders

[TERRY SMITH]

Hi, Arnold. I'm not sure about the 4A but suspect it's got cylinder liners. The real trick--ask me how I know!--is making sure the liners stand proud by .003 or close all the way around the cylinder. As I'm sure you already know, cinch the liners into the new figure 8 gaskets using the head bolts and sockets until you get them right. List advice has always seemed to be that copper compressible gaskets serve better for a long-term seal than steel. ISTR that Payen was recommended as best, but am not sure it's available anymore. My current head gasket is from TRF and is holding up extremely well, after all prep was meticulously done. Then again, I don't rev the engine over 4k despite my driving has historically been "spirited." Others on the List are certainly more qualified than I, so hope they respond too.
Terry Smith, '59 TR3A
New Hamsphire


> On September 20, 2017 at 1:51 PM asg123 at centurylink.net wrote:
> 
>     I have asked a similar question before but my mechanic and I are still undecided which rabbit hole to enter
>     Does anyone have experience with which head gaskets hold up best against blowing out around the combustion chambers?  I see the stainless steel composite gaskets which claim to be the best.  But, some people, including the tech support at BPNW, say that the OE copper gasket by Payen withstands high compression the best.  How does the German made Payen copper gasket hold up compared to the Lucas OE type copper gasket?   We had an OE copper head gasket blow out between cylinders #1 and #2 after only a few thousand miles. It was using 93 octane gas with the timing retarded a couple degrees to keep down spark knock, but it still dieseled on when we tried to shut it off.   A solid copper head gasket from Gasket Works custom milled to drop the compression to 130psi fixed the spark knock and dieseling, but we had chronic problems with the oil and water weeping into each other no matter what sealants we tried. As always thanks for your responses.  Arnold
> 
 

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