At 09:42 AM 12/2/91 -0800, herbeam wrote:
>Accordng to Rootes....50 lbs oil pressure is acceptable at over 2500
>rpm...as long as you have 35-40 lbs oil pressure at cruise it is very
>acceptable.. A performance book I have says that more than 50 psi of oil
>pressure on an engine that doesn't exceed 6000 rpm is not necessary and a hi
>volume pump on near stock engines only drags the hp down.
>The oil filter mount you have is acceptable....check the oil pressure relief
>valve for proper operation (hex head cover facing the right fender
>well....(pull it out when the engine is warm and see if its sticks or binds
>in the open position...also check your oil filter pressure relief spring and
>valve which is in the same block (hex head cover facing the front of the
>engine).
>If your pressure dwindles to 25psi and the relief valve is operating
>properly...you have an internal problems such as a worn pump or too loose
>bearing clearances somewhere....The other things that could be wrong are
>improper assembly of the timing chain oiler assembly (or lack of)..has ball
>and spring and the end of the tube should be pinched off. I would check the
>pump first...especially the clearance between the bottom of the gears and
>the bottom cover....alot of times the gears wear into the pumps housing and
>cover plate, and can be corrected by removing metal from the bottom of the
>housing and the cover plate. New series 1-3 pumps are hard to come by but a
>1725 pump can be adopted to the engine either by using a series V cam or
>exchanging the dist drive gear. Good luck
>-----Original Message-----
>From: MR JEROME T PEREIRA <CJWR71F(at)prodigy.com>
>To: alpines(at)autox.team.net <alpines(at)autox.team.net>
>Date: Tuesday, December 01, 1998 10:57 PM
>Subject: Low Oil Pressure
>
>
>>Im new to the mailing list, and just now getting back to finishing
>>restoration of a Series 1 Alpine I started ~15 years ago.
>>
>>I started by running 10-30 oil (leaked too much and resulted in low
>>oil pressure) I changed to 20 50, and get approx 50 psi on startup.
>>Once engine is hot (15 minutes on the highway) oil pressure slowly
>>drops off to approx 25 psi. I dont want to run the engine until this
>>is resolved. Suggestion Ive gotten so far was to check the oil
>>pressure relief valve. The engine has an non-original oil filter
>>base for a modern oil filter (fram ph16 currently installed) and
>>therefore the base is not the same as original (although I have 2
>>original bases with cartridge type filters). Adapter plate has
>>"Crysler" stamped on it ...I assume this is from later days when
>>Crysler was involved with Sunbeam. Alternate suggestion was to pull
>>the oil pump and check the clearances.
>>
>>Questions: Can anyone confirm this adapter base is acceptable? (it
>>looks like a good fit and doesnt leak) Do I need a special pressure
>>relief valve for this base or did it come with only one spring value?
>>(stock valves are larger diameter and dont fit...also stock unit felt
>>a little stiffer when I pressed on it with a screwdriver) ......If
>>the pressure relief valve checks out OK, does anyone have any
>>suggestion prior to pulling the oil pump?
>>
>
>
>
L.E. Mayfield 124 Maximillion Drive Madison, Al. 35758-8171 1-256-837-1051
http://www.hsv.tis.net/~mayfield
DrMayf(at)AOL.com mayfield(at)traveller.com <<<<preferred
Bonneville Land Speed Racer, '66 Hydroplane Drag Boat (390 FE)