After replacing the front main seal today we started the car up and it sounded great for about 2 mins then we had a knock and the car stalled. I thought it wasnt anything so I fired the car back up and get a knock, we let it run for a few minutes to inspect where the knock was coming from.

A friend of mine thought it was the valves cause the noise was coming from the valve covers. He had to leave so I called my nephew over to help me adjust the valves. I fired it up so my nephew could get an idea what it may be. He initially thought it was the flywheel, then he says its coming from my block and to check my oil pressure. Valves checked out and there all within specs.

If I have low oil pressure, what do I look into? When I googled "low oil pressure" it said to:

-Check oil level. level checked out good
-use heavier viscosity- I use 5W-30
-check oil pressure sending unit- it works and the light kicked on-still ON
-check oil pump- How would I know if I have a bad oil pump?

I read an article about changing out oil pumps and it mentioned not to use any sealant or gasketsealer cause it may clog up the passageways.

When I installed my 1JZ oil pump I remembered using that Toyota FIPG on it, is this a NO NO? There wasnt a gasket on there if I remember.

If my engine is knocking but still runs, is it still good?

 

Does the knock increase and decrease with engine rpm ? Does your oil pressure build as rpms increase ? A good rule of thumb is that you should have ten psi of oil pressure for every thousand rpm the engine is turning and at least 20 to 30 at idle.

 

Knock increases while the RPM rises. I dont have a oil pressure gauge hooked up. Im waiting tomorrow to borrow one from a friend.

 

dont run it if its knocking............ does it have oil pressure sensor?, is the light coming in on the dash ? take it to a mechanic just in case if you have ANY doubt. it would be cheaper in the long run before you destroy the whole bottom end! good luck bud i bet things gonna haul when you get it finished!!!

 

It does have a oil pressure sensor and the oil light did come ON. Im gonna check oil pressure tomorrow when I get a oil pressure gauge hooked up.

Im in a situation where money is low and dont have a choice but to do the work myself as I did the build.

 

Fipg on the oil pump is fine, hope you didnt destroy your bottom end. Did you ever install new bearings ? If the knocking comes on around 2k rpms, its a rod bearing, likely.