Playing baseball in a slant six game ,I thought I hit a double ,was wrong
coach told me I got hit with a foul ball and to go sit back on the bench
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| Adjust valves or are they original (1966) https://slantsix.org/forum/viewtopic.php?t=49045 |
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| Author: | Dltarnnr [ Wed Jun 13, 2012 12:52 pm ] |
| Post subject: | Adjust valves or are they original (1966) |
This engine has been sitting for 20 yrs after rewiring the whole car fixing floor pans started replacing alt fuel pump rebuilt carb etc. Take her to work and she runs strong. Its the long trips and she starts acting like she needs a tune up running rough at idle and then I hear something clanking when excelerating rod knock VALVES? Some of the members suggested adjusting the valves and it got me thinking how do I even know that this engine has been ever rebuilt to begin with? Could the unleaded fuel have something to do with it? Maybe dump some additive in the gas to see if it cures the problem. |
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| Author: | SlantSixDan [ Wed Jun 13, 2012 12:54 pm ] |
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Additives won't cure problems -- only make problems (waste your money, foul your spark plugs). Here is the valve adjustment procedure. "Knocking" can also be fuel pump, can be loose torque converter bolts...need more specificity. |
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| Author: | Dltarnnr [ Wed Jun 13, 2012 1:59 pm ] |
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Have been going to Napa for parts dont trust auto zone .How do I really know if this engine has even been touched and those valves are screaming for some leaded fuel? |
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| Author: | Dltarnnr [ Wed Jun 13, 2012 2:04 pm ] |
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Playing baseball in a slant six game ,I thought I hit a double ,was wrong coach told me I got hit with a foul ball and to go sit back on the bench
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| Author: | Reed [ Wed Jun 13, 2012 2:54 pm ] |
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If the valves are damaged enough to start showing symptoms from lack of unleaded fuel, the valves would be cracked or other wise damaged. A simple compression check would test this. Valve adjusting is a normal periodic maintenance procedure typically done every oil change. You should just do it. If you want to know the condition of your motor, do a compression check then install an oil pressure gauge and a vacuum gauge and observe them while driving. You want cylinder compression generally above 110 PSI and within 10% across the cylinders. It is normal to have some variation, but you want the readings to be within 10% of each other. A stock slant six should get 17-20 inches of vacuum at idle. The needle should be steady. You should see around 35-50 PSI oil pressure at first startup, it should settle down to anywhere from 5-25 PSI hot at idle, and it should go up when the RPMs increase. |
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| Author: | sandy in BC [ Wed Jun 13, 2012 2:57 pm ] |
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It doesnt matter if the valves have ever been adjusted...it only matters if it needs valve adjustment now. Go buy a new valve cover gasket and a set of feeler gauges. |
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| Author: | SlantSixDan [ Wed Jun 13, 2012 4:43 pm ] |
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You do not need leaded gasoline. You do need a valve adjustment every 20,000 miles or so. Go do it. Also, get the three books described in this thread as quickly as you can. |
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| Author: | Dltarnnr [ Thu Jun 14, 2012 12:24 pm ] |
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Thanks guys , will roll the dice and adjust them and if it works great if not at least I will know what needs to be next. Its been a great day for being lucky I work third shift so went over to pick n pull looking for that 69 valliant but ran across a 63 polara and started to drool all over myself heater core was bad but still got alot of goodies and my brother in law told me when I got the car that I could run across one. I take back what I was thinking about him. |
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