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K. Wiggins
K. Wiggins, ASE Certified Technician
Category: Australia Car
Satisfied Customers: 2514
Experience:  AA in automotive Technology, 15+ years in the trade
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Why is oil light coming on a elantra 1.8 XD auto, light

Customer Question

Why is oil light coming on a elantra 1.8 XD auto, light never come prior to remove rocker and found head needed to be cleaned descale of varnish and sludge, we air blowed all varnish and sludge from the head, running motor sludge cleaner oil came on, then carried out oil change full drain and new oil and filter, and oil light come on and stayed, and got better up about 2klms and flicker and stays on, fitted new sensor, a little better but same results, prior to cleaning head and oil change no problem, could have any of sludge or descale ended up in sump clogging oil pump ? Regards Len
Submitted: 12 months ago.
Category: Australia Car
Expert:  K. Wiggins replied 12 months ago.

Hello, it is very common if there is a large amount of sludge build up for it to clog the oil pump pickup when a flush is done. My suggestion would be to remove the oil pan, clean it and install a new oil pump pick up assembly

Depending on how long it was ran with oil lgiht on there may be damage to the rod and main bearings.