knock on startup first time
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From: Semper Fi tell I die!
knock on startup first time
well this morning i started my truck with a na 6.9 250,000 miles, and it knocked for about 10 seconds tell the oil pressure came up, felt like it was taking centurys!!! i have a mechanical oil press gauge i watch, it had been sitting for a month in -5 f to 15 f above or so without being started, you guys ever experiance this? it sounds fine now idling away in the driveway though, i probably should have switched to synthetic oil and plugged it in before winter, but i never done that before and never had a problem.
ray
ray
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From: Malahat/Cowichan Valley
if it sat for a month in those temps, it started dry as a bone and that was the reson for the knock, it would be like firing up an engine for the first time dry as hell, hard on them. Synthetics help but you can help it out a lot by turning it over once a week in those temps.
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From: Semper Fi tell I die!
i imagine pretty old as ive never changed them, but ive only had this engine since it was inthe 230-240,000 mile range. i think it was dry oiling system from sitting and this dino oil in the cold, it was neg zero f last night, so it probably took some pumping to get around, i think i might drain the oil and put some semisenthetic in it or somthing. or just start it once a week like the other guy suggested..
Ray
Ray
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From: Faibanks Ak.
Ray did your oil pressure come up quick. I'm betting you it was actually a fuel knock until it got a little heat.
My bif trucks all do it in those temps. I hate it but there is nothing really to do about it.
My bif trucks all do it in those temps. I hate it but there is nothing really to do about it.
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From: Faibanks Ak.
Ray I had a couple of trucks over at tok winter before last when the temps got 72 below and they started this on the highway 2 quarts of atf in each tank quieted them right down. Scared the hell out of me though.
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From: Semper Fi tell I die!
ya the pressure came right up within 10 seconds and the knock instantly went away as the pressure came.
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From: Faibanks Ak.
Do you have an oil pan heater. If you hadn't cranked it for a month and you live where I think you do you have had close to 30 below temps some days even though you are haveing a heatwave now it takes that iron and oil a long time to warm.
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From: Semper Fi tell I die!
ya i should have plugged it in, i got batt heaters, coolant heater, and oilpan heater, but i usually dont plug them in tell -20 then i plug them in for a hour or 2 before starting, and it starts up like its summer out, it started super easy today, just makes me nervous that knock in the beginning, took it for a drive and it seems to be good, the oil pressure after warming up is still 25 like it normaly is on my aftermarket gauge at idle.
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From: Semper Fi tell I die!
on my other 6.9 i was 4 wheelign allot and shut it off to take a brake one time, and it had knock when i started it back up but it was injector knock im pretty sure, as i just had replaced the injectors in that the winter before the spring i was wheeling it, i think i had a dribbler, i just run a extra dose of power service in it and it never did it again.
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From: Semper Fi tell I die!
its stilla work in progress but as it sits right now with the 6.9 in it im running cage progressive 6" coils. now there is no trans of andything in it yet either, the front clip is still off it also. as im working on the perfect positioning for the motor to shift some of the weight towards the rear.
Ray