ChrisR
Donation Time
I am thinking that I may have to change the big end bearings.
Over the winter, I refurbished the oil pump. I reassembled everything, filled with oil, injected oil down the filter supply to aid in priming and cranked the engine over a few times with the spark plugs loose. Then tightened the plugs and cranked the engine with the distributor cap removed. I did not managed to register any significant oil pressure.
I went ahead, put the distributor cap on and started the engine. After what I am thinking was about 5- 8 seconds, the oil pressure shot up from 0 to 40 psi. I ran the engine for a few minutes with rpm around 1500 rpm (Choke still on) until I noticed a coolant leak so I shut down. I addressed the leak (15 mins), then started up again.
I noticed a distinct new noise a like noisy tappets. I am thinking that as I have not touched that part of the engine, there is no reason for the rockers getting out of adjustment suddenly and maybe the 5-8 seconds of no oil has damaged a big end bearing. I will do a check by pulling plug leads and see if the sound goes away.
If it is a big end bearing, my question is, how do I determine what size to order? Do I need to pull the old and measure the crank? Are the current journals marked with size? I read in the workshop manual that the main bearing journals do have their size marked, but I cannot see a reference to the big end journals.
I hope that I have not scored the crank
Over the winter, I refurbished the oil pump. I reassembled everything, filled with oil, injected oil down the filter supply to aid in priming and cranked the engine over a few times with the spark plugs loose. Then tightened the plugs and cranked the engine with the distributor cap removed. I did not managed to register any significant oil pressure.
I went ahead, put the distributor cap on and started the engine. After what I am thinking was about 5- 8 seconds, the oil pressure shot up from 0 to 40 psi. I ran the engine for a few minutes with rpm around 1500 rpm (Choke still on) until I noticed a coolant leak so I shut down. I addressed the leak (15 mins), then started up again.
I noticed a distinct new noise a like noisy tappets. I am thinking that as I have not touched that part of the engine, there is no reason for the rockers getting out of adjustment suddenly and maybe the 5-8 seconds of no oil has damaged a big end bearing. I will do a check by pulling plug leads and see if the sound goes away.
If it is a big end bearing, my question is, how do I determine what size to order? Do I need to pull the old and measure the crank? Are the current journals marked with size? I read in the workshop manual that the main bearing journals do have their size marked, but I cannot see a reference to the big end journals.
I hope that I have not scored the crank