12/70 oil pressure relief valve removal

I am very slowly stripping an engine for re-build and have found the oil pressure relief valve assembly won't move.   I assume the spring and "plunger" are rusted together inside. Can it be driven out from underneath as there is an oil galley just below (which bridges the rear main bearing via a steel pipe)?   Is there an easy way to do it without damage?   The spring cannot be easily pulled out from above. Thanks! Posted by hday 05/12/2012 17:12:55

Hi, dont know if anyone has replied. Recommend you persevere with freeing up from above. I assume you have the sump off.
I have found the use of coca cola (other makes available!) very good for freeing up rusted items, when WD40 / paraffin are not succeeding. I think it must be the citric acid which converts the rust to its black form and in so doing seems to make it more friable.
Ideally you need to immerse it, but persistent soakings could also get you out of a hole.
Hope this helps. Mike 12/70 DRW167