Moparts Tech Archive
Slant 6 heads?Rug_Trucker
From: Near Nashville, TN USA
Registered: Aug 2000
posted 06-28-2002 03:52 PM
I am at a friends house. He has a 80 van with a slant. We are thinking it maybe a bad valve that is causing him to fail emission testing. If this ends up being the problem can we swap a rebuilt head from an earlier year? I believe it is a hydralic cam in the 80, I know the other one is solid. What says youze guys?
I don't think the hydraulics started until '81. It's easy to check though, just look in the oil cap and see if there are adjusters on the rockers. Hydraulics were non-adjustable. I don't think a solid head will flow enough oil to the rockers to pump up the lifters.
The peanut plug heads started in '74 or '75
He told me they were nonadjustable. (He has had the VC off before.) He got some bad information. Told me the plugs weren't too old. The cap and rotor was TOAST! We are gonna do it up tomorrow and bet I get his problem solved!
Hydralics didn't come in 'till '82.
Do the adjustments and tune-up....bet that will do the trick.
The difference in heads is the early ones with the tubes have no port for the EGR valve and also do not have a hole into the water jacket for the CCEGR sensor. Plus, they leak oil pretty bad.
like slant said the tube heads went away in 75ish...
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