hello V8 Buick, My engine dont run very whell. There is A lot of tapping/clicking gowing on. But not the hole time. When it is cold not so mutch but it stil dus. When hot much worse but not in A rhythm. Can it be that my hydraulic lifters not working wel??? How can I see on them that the are brok?? How do the work?? Can there be somting els not working wel?? Like the oil. There is enough oil in the engine. How do I check I the lifters get there oil?? Many questions hopful any one can gife me A answer. Thanks.
Another possibility is an exhaust manifold leak. Make sure your manifold bolts are properly torqued, and manifolds not cracked. A leak can sound like noisy lifters.
Koos, You say the noise is not in a rhythm. Valvetrain noise should be rhythmical, increasing and decreasing with engine speed. Lifters are usually trouble free for the life of the motor as long as you maintain a good oil change schedule. Hydraulic lifters are precision parts, and dirty oil can make them stick. I would check the torque converter to flywheel bolts. There is an inspection cover on the bottom of the transmission behind the engine oil pan. Remove it and check the 3 bolts holding the converter to the flywheel. You will have to rotate the flywheel to check all of them, they are 120 degrees apart. While your at it, check the condition of the flywheel. Cracked flywheels are common and will give an irregular knocking noise in nuetral and a clicking noise in gear. Hope that helps.
I had a bad cam and lifters in a 350. I ran the engine minus the valve covers to better hear it. Push down on each rocker arm one at a time with it running at idle or a little higher. Push at the bottom of the rocker where it meets the valve. I used my thumb to apply the presure. Wrap a rag around your thumb so you don't rattle any teeth lose! When one quiets down while doing this, you have found your bad cam lobe or lifter. Sounds silly, but It worked for me. Good luck, Dan
Hello V8 buick guys, Thanks for your replys. About the rhythm. it is less then louder ten less /left side right side. there is not one tappin sound in A rhythem. Wat I hear and can see that it is prity loud. How can I see if the lifter is broken?? The heads have al new valvs but after A backfire. Two pises of the airfilter hold doun pin above the carburator dit fall in the engine and I have seen traces of them in the 1 and 4 cilinder. The spark plugs where broken on the end. After that the engine dit work whell. And now two monds later the tapping begins. I dont now if it is connectet. I whil let you now what I find. Thanks.
Hello V8 Buick, I have pult of the intake manifold. Furst lookt at the flywheel bolts but the where fast. The exhaust was good too. Dit not run the engine witout valve covers alrady hat it took apart so the engine cut not run any more. The lifters dont look good to me. Som I cant puse doun other go very easy doun. How shut the lifters work. How muts pressur is needed to puse the lifters. Any good tips where I shut look at now I have the engine apart. What shut I do whit the oil pump? Thanks.
Koos, Some of the lifters will be under valve spring pressure(some valves will be open) Others valves will be closed, those lifter plungers will compress. I think you may have metal in some cylinders from the aircleaner holdown that slipped into the carburetor. Can you get a compression tester and do a compression test on the motor? That will tell you something about it's internal condition. I would not touch the oil pump. Do you have a oil pressure gauge hooked up? If so, what was your oil pressure with the engine hot?
SOUNDS LIKE THERE IS MORE TROUBLE LOWER THAN THE LIFTER AREA. MAYBE A VALVE HITTING THE PISTON NOW. EITHER WAY IT ISN'T GOOD. PAT
Helo V8 Buick, I think I put the words rong. By lifter I mean the Hydraulic lifter. I have taken them out of the engine to see how the look. I whas hard work the hade som burr on the camschaft side. So som are isy to pus in and som are alrady doun. How muts travel is there in A hydraulic lifter?? And how strong you have to pus to pus them in. Thanks.
Koos, It sounds like you may need new lifters and a cam. The lifters should come right out. It will be hard to push the lifter plungers in especially if they are filled with oil. That's not what worries me, it sounds like the bottoms of at least some of the lifters are mushroomed. They are worn and the corresponding cam lobes are also worn for sure. That would explain why the engine had valvetrain noise and wasn't running well. I hope you kept track of which lifter came out of which position. You don't want to reinstall them in wrong positions, but I think you might want to access the overall condition of the engine and consider rebuilding it. The cam bearings may be bad and to do that right, the engine has to come out. If you don't want to do that, I would go with new lifters and cam. Breakin procedure is very important with a new cam, but we will deal with that when and if you proceed further. Good Luck.
Hello Larry, Whell I am sore the hydraulic lifters ar brook. So you see I need also A new cam when pleasing new lifters. Whell I whas soo fast And almost sure that the lifters where brook that I ordert som new hydraulic lifters at Summit racing. But now I dit read so muts more about it I see I cut buy A compleet set (lifter and cam). My intension whas to upgrade the engine from 2bbl to 4bbl and get som more power. But the engine sut be good fuel economy bicose it is A daly driver. Fuel is in the netherlands one dollar for A liter whill you pay one dollar for A gallon (3,8 liter). What you think I most do whit the cam. I lookt at TA Performance site. The TA 112 and TA 212 looks good. But I dont have muts experions whit engine tunning. I like to have the new intake manifold and quadrajet 4bbl but I have to whats cost es whell. The transportasion from parts from the usa to netherlands is whery costy to. Great talking to you, and other members to. Learnt A lot about my buick V8 the past week. There are not muts books over buick engine. Greetings.
