Motorad Engine Crankcase Breather Cap P/N:MO135
Motorad MO70 crankcase breather cap for the 1969-1970 Ford Mustang 6-cylinder 3.3L, the 1969-1971 Mustang 6-cylinder 4.1L and other vehicles closes the engine's crankcase opening and helps manage crankcase ventilation. Some catalogs list it as an engine crankcase breather cap.
Oil residue around the opening, a cracked cap or a seal that no longer sits flat can mean the cap is worn. Before you replace it, look it over with the engine off and cool, since a nearby gasket can leak oil to the same spot.
The cars it fits include the 1964 Ford F-250 V8 4.8L, the 1965 F-250 V8 5.8L, the 1966-1967 F-250 6-cylinder 3.9L and the 1968-1969 Dodge Charger 6-cylinder 3.7L or V8 5.2L, 6.3L, 7.0L or 7.2L. The 1969-1970 Ford Mustang 6-cylinder 3.3L takes one. It is designed to OEM specifications. If your car isn't named here, look up its year and engine in the "Vehicles it fits" section.
Fit and size
Build and materials
Interchange: 703-1851
12C20 · KV1011 · KV1012 · KV1027 · KV1028 · KV1032 · KV1034 · KV1035 · 8070 · 10070 · C4TZ6766A · C4TZ6766B · C5ZZ6766D · C8TZ6766A · 6458075 · 6485076 · EC10 · EC30 · EC31 · EC4 · EC70 · 14070 · P8070 · 9MO70
This part cross-references / interchanges with the following part numbers:
Does the Motorad MO70 breather cap fit a 1969-1970 Ford Mustang 6-cylinder 3.3L?
Yes. Motorad MO70 fits the 1969-1970 Ford Mustang 6-cylinder 3.3L and the 1969-1971 Mustang 6-cylinder 4.1L. The "Vehicles it fits" section covers the other vehicles.
What size is the Motorad MO70 breather cap?
The Motorad MO70 has a round shell 61.21 mm (2.41 in) across, a neck diameter of 40.13 mm (1.58 in) and a height of 50.80 mm (2.00 in).
Does this silver metal breather cap push in or twist on?
This breather cap is push-fit, so it presses into place rather than twisting on. The housing is metal with a silver finish.
What can a cracked or oil-stained breather cap mean?
A cracked cap, a seal that no longer sits flat or oil residue around the opening can mean the cap is worn. You can see all of these with the engine off and cool.
Does the Motorad MO70 replace C5ZZ6766D?
Yes. C5ZZ6766D is one of the other numbers that the Motorad MO70 breather cap replaces, and it is printed on the Interchange line.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.