Matt306 Posted December 29, 2023 Share Posted December 29, 2023 (edited) Hi anyone have any ideas for low oil pressure build up on a TR7 engine. The engine has just been rebuilt with +10 bearing +20 pistons. I had slow build up of oil pressure so opted for a new oil pump, and its still no good. I am using a cheaper oil at the moment for running in a 20/50 mineral oil from Opie oils. I have some valvoline 20/50 Valvoline All-Climate 20w-50 High Quality Engine Oil (opieoils.co.uk) to go in at next change. The old engine was better although it was well worn on the cylinder bores. I am thinking the Jackshaft was probably worn the bearings which will mean line bore and some shells inserted. I have removed the water pump and replaced with an electric one. The Dizzy only drives the oil pump now although it does provide a cam signal for the ecu. Any other thoughts/quick fixes before I engage in more engine surgery Edited December 29, 2023 by Matt306 forgot Quote Link to comment Share on other sites More sharing options...
chris2 Posted December 29, 2023 Share Posted December 29, 2023 Hi I have a dolomite engine in tr7 . I has a electric water pump oil pressure about 40-55 psi when cold then 25 -45 psi when warmer oil . when the engine was rebuilt up used a drill and socket to drive oil pump distributor remove to drive oil pump check pressure and turn engine over by hand. The jackshaft will only oil to camshaft at 1 or places on jackshaft . OIl pump have prv [bypass valve spring] most all new pump have a heavy spring giving higher pressure Robsport sale prv spring no 215573spring . My has this spring fitted. Chris Quote Link to comment Share on other sites More sharing options...
Matt306 Posted January 11 Author Share Posted January 11 Fitted an oil Pressure gauge changed the oil to Valvoline 20/50 also swapped the oil filter from the blue print one to a borg and beck (both from Rob Sport.) The oil pressure now is not slow to build light goes out quickly the gauge showing 40 when cold idle about 30 when warm. Maybe the cheaper oil, maybe the change of oil filter who knows! Quote Link to comment Share on other sites More sharing options...
Beans Posted January 11 Share Posted January 11 Those look rather realistic pressure values. So the oil filter might well have been the culprit. Do you have the original filter set up or a spin-on conversion? Quote Link to comment Share on other sites More sharing options...
Matt306 Posted January 12 Author Share Posted January 12 Spin on conversion. The oil is a better quality one as well. The blue print filters are just coming on the market I imagine they come from the far east. Quote Link to comment Share on other sites More sharing options...
Beans Posted January 13 Share Posted January 13 21 hours ago, Matt306 said: Spin on conversion In that case stick to reputed brands like you use now or the likes of Bosch, Mann, Mahle or Purflux Quote Link to comment Share on other sites More sharing options...
Matt306 Posted January 13 Author Share Posted January 13 is that the correct one for spin on conversion? Quote Link to comment Share on other sites More sharing options...
glang Posted January 13 Share Posted January 13 Yes thats the equivalent of the filter that is used on all the Triumph spin on conversions Quote Link to comment Share on other sites More sharing options...
.thumb.jpeg.b15b81ef10abeea1c3039ae03c4a9f3a.jpeg)
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.