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Old 03-10-2018, 03:44 AM   #972
Matt@Cosworth
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Quote:
Originally Posted by killboy View Post
There is a spring-based PRV inside the front cover. By adding a couple of washers under the spring, you can increase the pressure it requires before opening, so you can run thicker oil/higher pressure without blowing it out the PRV.

while you've got the front cover off I'd say to remove the oil gallery passage blanking plate and give the sharp corners of the main gallery a tickle with the dremel as it has to do a right angle turn to get out of the oil pump
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