5 Main Bearing MGB Oil Pan Reinforcement Plates Stop Leaks


10 in stock


10 in stock


Finally, Back in Stock!

The MGB oil pan reinforcement plates will stop oil leakage from the front and rear of your 5 main bearing oil pan.

The front and rear are more susceptible to leaks for two reasons:

The oil returns from the front and rear main bearings are just inside the pan so there is a constant flow of oil in these spots.

The rear part of the pan below the rear main bearing has only a thin part of the pan pressing on an equally thin section of oil pan gasket. This compounds the problem.

Add to that the very thin sheet metal of the oil pan itself often leads to distortion especially if the mounting bolts are over tightened. The small ribs between the bolt holes do not transmit the pressure of the bolts to the surface between the bolt holes leaving gaps for oil to seep through.

The MGB oil pan reinforcement plates are 3/16” steel plates fabricated to fit on the front and rear of the oil pan.

The attached pictures show how they work.

The first picture shows the complete kit.

The second picture shows the rear of the oil pan. Notice that in the center of the mating flange that the width of the flange narrows considerably.  This is due to a drain hole from the rear main bearing cap. Also notice that the raised ribs between the other bolt holes is missing from this center section.

The third picture shows a surface ground strap place on the flange between the center bolt holes. The strap is ground to be the same height as the ribs are above the base surface of the flange.

The fourth picture shows surface ground circular spacers placed over the bolt hole areas. Ditto on the height.

The fifth picture shows the 3/16″ steel plate placed over the flange. The plate touches the strap, the spacers and the ribs.

The sixth picture shows the front plate on the front of the oil pan. The only difference is that there is no strap, just five circular spacers.

When the bolts are installed and tightened the plates apply equal pressure to the entire front and rear of the oil pan.

Longer than stock grade eight bolts and new washers/lock washers are supplied with the plates.

The sides of the oil pan use the stock bolts and washers.

Price: $60.00 plus $9.65 shipping.

International buyers, contact me for shipping rates, and please be aware that customs charges may apply.

I will ship the next business day after receiving payment.

Please contact me with questions.

Additional information

Weight 19 oz
Dimensions 13 × 10 × .5 in


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