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Crank case to block studs

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Crank case to block studs
Alan Offline
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Joined: Aug 2017 Posts: 1,360 Threads: 34
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Location: Cheshire
Car type: Race Ulster, 1926 Special, 1927 Chummy, 1930 Box
#4
18-04-2019, 08:53 AM
My guess is they’ll be fatigue failures. The joint is subjected to cyclical loading, and to withstand this the clamping load needs to be greater then the load variation. If it’s not, two things usually happen. First the nuts unscrew themselves. Secondly the bolts fatigue rather quickly. Either of these might happen first. The greatest loading will be on the valve chest side so I imagine these loosen first which makes matters worse by putting a bending load on the others. I’m a bit worried by the resilience of the silicone gasket too - I stopped using them.
Alan Fairless
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Messages In This Thread
RE: Crank case to block studs - by Chris KC - 18-04-2019, 07:51 AM
RE: Crank case to block studs - by Ian Williams - 18-04-2019, 08:21 AM
RE: Crank case to block studs - by Alan - 18-04-2019, 08:53 AM
RE: Crank case to block studs - by Speedex750 - 18-04-2019, 09:01 AM
RE: Crank case to block studs - by Ian Williams - 18-04-2019, 08:23 PM
RE: Crank case to block studs - by Alan - 18-04-2019, 10:03 PM
RE: Crank case to block studs - by Ian Williams - 19-04-2019, 06:07 AM
RE: Crank case to block studs - by AustinWood - 19-04-2019, 10:35 AM
RE: Crank case to block studs - by Greig Smith - 20-04-2019, 09:59 AM
RE: Crank case to block studs - by AustinWood - 20-04-2019, 10:06 AM
RE: Crank case to block studs - by Chris KC - 20-04-2019, 11:46 AM
RE: Crank case to block studs - by AustinWood - 20-04-2019, 12:19 PM
RE: Crank case to block studs - by Dave Wortley - 20-04-2019, 04:35 PM

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