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#1
22-06-16, 07:32
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Morris C8
Just an interesting conundrum for every one, on removing my cylinder head today I found there were two copper gaskets fitted, any ideas? I did use the timber wedge technique thanks to Philip@cmp.com.
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#2
22-06-16, 07:45
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Likely trying to seal a warped head or block.
__________________
1940 Cab 11 C8 Wireless with 1A2 box & 11 set 1940 Cab 11 C8 cab and chassis 1940 Cab 11 C15 with 2A1 & Motley mount & Lewis gun 1940 Cab 11 F15A w/ Chev rear ends 1941 Cab 12 F15A 1942-44 Cab 13 F15A x 5 1942 cab 13 F15A with 2B1 box 1943 cab 13 F15A with 2H1 box 1943 Cab 13 C8A HUP 1944 Cab 13 C15A with 2C1 box 1943 Cletrac M2 High Speed Tractor MkII Bren gun carrier chassis x 2
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#3
22-06-16, 07:51
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Performance
It may not be why your C8 has two head gaskets but I've heard the PMG used to fit two head gaskets to lower the compression / performance of there cars
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#4
22-06-16, 10:27
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Morris C8
Interesting David and will check out the head and block tomorrow.
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#5
22-06-16, 14:38
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Also check piston to head clearnce
Hi Paul
Glad you got the head off. Are the piston tops flat or domed? If they are domed check to see how much clearance there is piston to head. Did these engines have or change from flat to domed piston? Reason I say this is that when had to replace the head one my HUP the new head was ment for flat top pistons but the engine had domed piston I replaced the pistons. Having said all that my bet is on Greg's theory done to allow the engine to burn lower octane fuel. Cheers Phil
__________________
Phil Waterman `41 C60L Pattern 12 `42 C60S Radio Pattern 13 `45 HUP http://canadianmilitarypattern.com/ New e-mail Philip@canadianmilitarypattern.com
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#6
22-06-16, 19:12
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The Morris is a side valve, they are low enough compression as it is unless a farmer had been using it with Vaporising oil or as you might call it Kero or Paraffin, but my bet is one of two possibilities, the head is warped, not unusual, or that the head has already been skimmed (too much) and now the valves are kissing the head so fitted 2 head gaskets! Only way to know if the head has been skimmed too far is to get another Morris owner with a C8 or C4 to measure the height of their head.
Pretty sure there were no domed pistons on these side valves, only ever seen flat tops. regards, Richard
__________________
Richard 1943 Bedford QLD lorry - 1941 BSA WM20 m/cycle - 1943 Daimler Scout Car Mk2 Member of MVT, IMPS, MVG of NSW, KVE and AMVCS KVE President & KVE News Editor
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#7
23-06-16, 07:16
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Morris C8
Thanks for your input every one, I have checked the head & block and all is flat and good. The pistons have flat heads and the cylinder head has plenty of clearance, the sparking is over the valves so no problem there either. Maybe the theory of using other fuel maybe the reason, pretty sure the guy who did the restoration didn't take the head off as the compression was good but I will ask him. Have only one port to clean up, bit of corrosion due to water getting past a loose plug on no 4.
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