Crusader 454's

[Joeshoes]

My Chrysler 318 engined need to have the exhaust manifold, risers etc changed every 4 or 5 years. Is this true for the 454's.

A mechanic told me they last for 20 years(?)

 

[HOGAN]

fresh or raw water cooled? Fresh or salt water?

 

[cwms]

With any full fresh water cooled engine, the manifolds should last about as long as the engine. Risers, however, will not since they have raw water running thru them.

 

[Bob J]

I have '93, full FWC Crusader 454XLs. I run in salt water & have changed exhaust elbows once since new.

 

[cwms]

Chryslers, Mercs, Crusaders, 318's, 454's. It really doesn't matter. Whatever the engine is, if it is freshwater cooled, the manifolds should last as long as the engine.
If it's raw water cooled, manifolds could go in 3 years or maybe as long as 10 years depending on where the boat is used - fresh or salt water.

 

[Joeshoes]

The 454's that I am referring to are in salt water and are fresh water cooled.

My 318 (same - fwc and in salt water) just about die after 4 years with corrosion.

 

[cwms]

Your 318's, are they a full FWC system or 1/2 system? Meaning, does the closed cooling system include the manifolds? If you have anti-freeze running thru the manifolds, there is no reason they should be rusting out in 4 years.