Author Topic: Oil pressure release valve  (Read 1093 times)

Offline sprint

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Oil pressure release valve
« on: 11.06. 2013 19:51 »
What size socket do you need to undo the original 'flat' type oil pressure release valve on the Super Rocket engine, the large one next to the crankcase?

Are the later domed type a direct replacement, as the hex head is a lot smaller?

Offline shuswapkev

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Re: Oil pressure release valve
« Reply #1 on: 12.06. 2013 12:45 »
1 1/8 works on mine...just put that in tonight

Offline sprint

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Re: Oil pressure release valve
« Reply #2 on: 12.06. 2013 15:56 »
1 1/8 works on mine...just put that in tonight

Thanks.

Have you now fitted one of the later domed types? If so is it a direct replacement?

Online a101960

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Re: Oil pressure release valve
« Reply #3 on: 12.06. 2013 16:08 »
I have fitted a domed PRV sourced from SRM, and yes it was a direct replacement.

John

Offline sprint

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Re: Oil pressure release valve
« Reply #4 on: 12.06. 2013 17:19 »
I have fitted a domed PRV sourced from SRM, and yes it was a direct replacement.

John

Thanks John

One other question you may be able to help with?

It us my understanding that the original BSA one operated  at 60psi but the later domed ones work at 75psi, is that correct and does it have any significant impact?

Offline Dynamo Regulators Mike

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Re: Oil pressure release valve
« Reply #5 on: 13.06. 2013 17:47 »
Puts more load on the pump and drive, but perhpas more significantly the higher peak pressure may lead to more oil leakage and seepage through the cases due to porosity. At least that seemed to happen to mine with SRM valve. Their regulator valve came with 2 plain washers increasing the spring preload. Removing these returned the regulated pressure to close to the original pressure. BTW this was OK'd by SRM.
Mike Hutchings
A10, B50, T800; 1,2,3 (& DVR2)
Director, DRL www.dynamoregulators.com