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**rogoman** · Apr 9th, 2008, 07:58 PM

Being that the motor is a SOHC, it uses hydraulic valve lifters. The lifters may be worn, may have air in them or else the oil pressure is very low.

You can check the oil pressure very easily by installing a temporary mechanical oil pressure gauge. You would remove the oil sensor which is located next to the oil filter and install the mechanical oil pressure gauge in it's place; you may need to get an 1/8 BSPT to 1/8 NPT adapter to hook up the gauge.

With the engine fully warmed up, the pressure should be as follows:
idle - at least 11 psi
3000 RPM - 60 to 70 psi

If the oil pump needs to be replaced, it's easy to do so on an '89 as it bolts on externally.

Apr 9th, 2008, 07:58 PM	#4 (permalink)
rogoman Super Moderator Join Date: Dec 2004 Location: NJ (Philadelphia area) Posts: 1,886	Being that the motor is a SOHC, it uses hydraulic valve lifters. The lifters may be worn, may have air in them or else the oil pressure is very low. You can check the oil pressure very easily by installing a temporary mechanical oil pressure gauge. You would remove the oil sensor which is located next to the oil filter and install the mechanical oil pressure gauge in it's place; you may need to get an 1/8 BSPT to 1/8 NPT adapter to hook up the gauge. With the engine fully warmed up, the pressure should be as follows: idle - at least 11 psi 3000 RPM - 60 to 70 psi If the oil pump needs to be replaced, it's easy to do so on an '89 as it bolts on externally. __________________ KA > SR anyday of the week.