lifters sunk?
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From: WEST TENN.
lifters sunk?
I have been having a problem with my motor popping when you give it gas, I thought maybe carb, timing, but after checking all that, I am now leaning towards a collapsed lifter, or bad cam. Been also getting a noise from the motor, but not so much a rod sound, a little higher in sound, maybe pushrod tapping.
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From: WEST TENN.
no,
mine started out as a light tap, but then as gotten alittle more noisy and more consistent. When the popping started I could here the noise thru the pipes. I had new heads put on, but did not change the cam, I think the new valve springs might have been too much for old lifters. Yours does sound like a weak lifter.
mine started out as a light tap, but then as gotten alittle more noisy and more consistent. When the popping started I could here the noise thru the pipes. I had new heads put on, but did not change the cam, I think the new valve springs might have been too much for old lifters. Yours does sound like a weak lifter.
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From: MCBH Kaneohe Bay, HI
Now i got a non stock cam (RV cam from Comp), is there any recommendations as far as just swappin a set of lifters and leavin the cam sit? The cam is about 2 years old and so are the lifters, valvetrain came with the new long block. Let me know. Appreciate it
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From: WEST TENN.
2 year old cam, should get more life than that, I would check the lifters, and they can be replaced with out replacing cam. I would use a different brand lifter next time around. I am currently installing a crane set up, I had a comp last time around. I am hoping the crane is a little better in quality. But another consideration, a set of lifters will run you about 100 bucks, for a few bucks more you could go new cam to boot. After you change your oil, does your oil pressure come up? I am beginning to wonder if oil pump is losing prime.
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From: MCBH Kaneohe Bay, HI
Right after I change the oil the pressure is great. Ive been runnin Castrol Syntec synthetic ever since I broke the new motor in. The tappin is pretty bad right after a change for a couple weeks then settles down as the oil gets dirtier. Im thinkin the new oil flushes out the dirt thats holding hydraulic pressure in the lifters.
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From: WEST TENN.
The synthetic may be too thin, I would try 5w30 wieght oil next go around to see if maybe that is the problem, but sounds definitely lifters, I found some great stuff in Jegs, that's where my cam is coming from.
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From: MCBH Kaneohe Bay, HI
I usually run 10w40 syntec in it when i was back home but they dont sell the stuff in Hawaii so i switched to 10w30 for one change and that made it tap more so this past time I put in 20w50 in there. quieted it down a hair but not much. Im thinkin a set of lifters is in order. Just wanted to make sure it was that and not a bad rocker or bent pushrod. I dont really goose the motor much, unless im offroadin and the tires are spinnin. I try to take care of it. The rebuilt and bored over motor is startin to puff a little blue smoke and its only got about 35000 miles on it.Im thinkin its the rings since its bored out and has stock pistons and all.
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From: WEST TENN.
I agree on the lifters, when they put mine back together, the guy put a crank kit, and new heads but used an older cam and lifters, I think that the new valve springs were too much for used lifters. As for blue smoke, I would think valve seals if it is limited to start up, or long idle. If it is constant faint, then yes rings, but more likely in the top end.
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From: MCBH Kaneohe Bay, HI
long idle definitely and start up if i aint run it in a long time. I just got back from deployment and started it up and it puffed quite a bit from the start up. Also, when I got back from MOS school and fired it up when it was still back home it puffed for a good 5 minutes
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From: WEST TENN.
At idle there is not as much friction, friction making heat may swell the seals a bit and seal them, just theory. The synthetic maybe giving your seals a hard time, lifters, valve seals? Try some thick standard oil it may help the lifters, and be thick enough to not get by the valve seals.