Thicker head gaskets for 4.6 Rover wanted

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ratwing
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Thicker head gaskets for 4.6 Rover wanted

Post by ratwing » Sun May 13, 2018 9:12 pm

Does anyone know where I can buy some or get some made? This is for a n/a engine, not turbo/supercharged but I need to lower the CR to compensate for skimmed heads and a decked block.
I can't find any and was even wondering if its possible to use 2 composites per head?
Or get some cut from thick copper sheet, would this work or would fretting due to the different expansion rates of copper, ally and steel eventually lead to leaks?



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stevieturbo
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Re: Thicker head gaskets for 4.6 Rover wanted

Post by stevieturbo » Sun May 13, 2018 10:05 pm

How much were they skimmed ??

Must be a huge amount to warrant any thicker than a factory composite 4.6 gasket ? And no, 2 gaskets is not a good idea at all.

And how thick do you need ?
9.85 @ 144.75mph
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sidecar
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Re: Thicker head gaskets for 4.6 Rover wanted

Post by sidecar » Mon May 14, 2018 9:05 am

I have been faced with a situation where the CR was too high, we were building an engine where the heads had been skimmed, it looked like the tool that was used was an angle grinder! The heads needed another skim to sort out the mess, this left the CR too high. In the end we 'scooped' out some material from each combustion chamber using a windy tool and rotary burr. It took ages because we had to keep 'buretting' each chamber in turn until we got the right volume. I think this is a better option than two head gaskets. The thickest gaskets that I have seen are around 1.5mm from memory. V8 Developments?

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r2d2hp
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Re: Thicker head gaskets for 4.6 Rover wanted

Post by r2d2hp » Mon May 14, 2018 10:37 am

Have you checked the cometic site as they do offer thicker gaskets. The maybe for the 14 stud head but guess that would not matter.

http://www.cometic.com/ag-1349999.13488 ... 6-v-8.html

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