Question about Mazda Cars & Trucks
Hi Michael I assume your talking crankcase pressure? However if your talking oil pressure in general On a car of that age oil pressure normally drops not rises if this is the issue you would normally be looking at a blockage possible pressure relief valve or incorrect oil used , Sludging internal of engine or faulty pressure switch. If any major engine work has been carried out it may be something has been fitted incorrectly or wrong part fitted.
More common would be crankcase pressure on a vehicle of this age this may be raised. Easily checked at dipstick remove dipstick and you can normally feel it at the top of dipstick hole. Common cause would be from the minor to major issues; Wrong oil or over filled, engine breather system blocked, worn piston rings or bores or both, possible worn valve guides or guide seals (less common cause) but don't rule out.
Check the above in that order with regards checking piston rings bores , carry out compression test (dry) I.e. remove spark plugs and carry out test note readings. (wet) squirt about 3 shots of engine oil into spark plug holes from an oil can. Crank one revolution and retest compressions see if they rise dramatically. Again note readings Finally these tests should be performed by a qualified mechanic carry out a cylinder leakage test on all cylinders. After all tests are carried out you should be able to draw a diagnosis to what needs to be done. It may be that your engine is beyond economical repair and may be cheaper to drop a rebuilt unit in. Good luck
Posted on Aug 17, 2018
Testimonial: "Thanks for your help. I think it could be the wrong oil and having removed the thermal stat oil not getting hot enough hence causing a blockage that I will have to check. Thank you for your help"
Mazda has used the engine displacement to determine each model's name; the B1500 had a 1.5 L engine and the B2600 had a 2.6 L engine. In Japan, the name Mazda Proceed was used for the compact pickup www.telldunkin.com
Posted on Aug 22, 2018
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Posted on Jan 02, 2017
SOURCE: oil problem
not sure if the high pressure pump has been changed if it has it could have the wrong gasket on it where it bolts to the timing cover they had several gaskets that will fit but causes drain back trouble
Posted on Feb 17, 2010
Testimonial: "Thanks for your information on my problem we thought it might be the oil pump but will look at your suggestion too."
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