My mechanic says that it is correct, I don't know is it true or not? Please help! And what should I do to correct that if it is wrong?
2006-12-02 22:41:35 · 3 answers · asked by Haroundb 2 in Cars & Transportation ➔ Maintenance & Repairs
If the carburettor is the type with a brass type disk on top that unscrews and slides out to reveal a small cylinder then you need to put light lubricating oil inside the cylinder. This enables the piston to move more efficiently. However if the mechanic is fully qualified then he should know what he is talking about so I would take his advice. Check the drivers manual which should have a section on the carburettor and it's maintenance.
2006-12-02 22:52:31 · answer #1 · answered by quatt47 7 · 0⤊ 0⤋
The oil IS supposed to be there. You must have a CD Stromberg sidedraught or an S.U carb. The plastic cap(brass on early versions) that you can remove has a metal rod about 3 1/2 inches long with abrass piston attached to it. The purpose of the oil is to act as a damper to slow the piston. I use ATF. Auto trans fluid. The purpose of the SU damper is to retard the rapid upward movement of the piston on the rapid throttle opening associated with acceleration. This delay in piston movement causes a momentary decrease in pressure at the throat, thus achieving a momentary increase in richness much the same as with an accelerator pump. The weight of the oil in the damper determines the amount of dampening. A lot of race mechanics use automatic transmission fluid. SU publications recommend 20 weight, which I would follow.
Do not overfill the damper. The proper procedure is to fill "below the top of the hollow piston rod", not "below the top of the chamber neck". Overfilling just spills over into the suction chamber and makes a mess. One easy check is to remove the damper and then re-insert it. If you feel resistance before you reach the threads on the cap, you've put in enough oil.
2006-12-03 00:11:21 · answer #2 · answered by 351jas 4 · 0⤊ 1⤋
it depends on what kind of oil he is talking about...if the piston is made out of brass, then no, because brass has it's own lubrication, but if it is copper then yes you need to lube it...but not with motor oil...you need to find some copper lube...best place to find it is at a music store
2006-12-02 23:11:31 · answer #3 · answered by slim69782003 2 · 0⤊ 0⤋