My '76 FJ-40 died on me on the highway yesterday and I think I have the culprit but looking for opinions on noise I heard.
Was cruising along at 60 mph and noticed that the fuel gauge showed that my fuel level had gone down significantly (1/8+ of tank) in about 7-10 minutes of highway driving. I know FJ's make gas disappear like magic but I average around 10-11 mpg so something was going on. Before I could pull over to see what was up, engine died with some knocking/grinding noise from underneath.
Had it towed home and dug into it last night. First thing I did was pull dipstick to check oil level / appearance. To my shock the dipstick was almost completely covered to the top and the oil was very milky colored. I check the oil frequently and it was not over-filled. When I wiped off the dipstick the oil had a gas smell to it. Could this be where my gas disappeared to!?
Checked the forums and found this thread which makes me think the culprit is my fuel pump or more specifically the fuel pump diaphragm:
https://forum.ih8mud.com/threads/gas-in-my-oil.454718/#post-6310916
Question is....if this diagnosis is accurate, what was the knocking/grinding sound when it died? I plan to drain the oil, replace with fresh, check/change spark plugs, replace fuel pump and gasket and try to fire it back up but the noise I heard worries me. Any thoughts or anyone else experience this before?
Thanks in advance for any advice / input!
Was cruising along at 60 mph and noticed that the fuel gauge showed that my fuel level had gone down significantly (1/8+ of tank) in about 7-10 minutes of highway driving. I know FJ's make gas disappear like magic but I average around 10-11 mpg so something was going on. Before I could pull over to see what was up, engine died with some knocking/grinding noise from underneath.
Had it towed home and dug into it last night. First thing I did was pull dipstick to check oil level / appearance. To my shock the dipstick was almost completely covered to the top and the oil was very milky colored. I check the oil frequently and it was not over-filled. When I wiped off the dipstick the oil had a gas smell to it. Could this be where my gas disappeared to!?
Checked the forums and found this thread which makes me think the culprit is my fuel pump or more specifically the fuel pump diaphragm:
https://forum.ih8mud.com/threads/gas-in-my-oil.454718/#post-6310916
Question is....if this diagnosis is accurate, what was the knocking/grinding sound when it died? I plan to drain the oil, replace with fresh, check/change spark plugs, replace fuel pump and gasket and try to fire it back up but the noise I heard worries me. Any thoughts or anyone else experience this before?
Thanks in advance for any advice / input!