L 98 valve covers

[silver 80]

what makes the valve covers change color? heat?

A 91 with 95K What should have been done for maintenance? ie: timing chain, injector cleaning, trany oil changed.
is there a place where all of this laid out, with out looking in the manual.
going to look at a yellow 91 in a couple days.
tom

 

[Melena]

From Service Manual

These are pages from the 1990 Service Manual
Seems the jpg images didn't download. Do you want Maintenance Schedules I and II emailed to you?

 

[Ken]

what makes the valve covers change color?

To which valve covers are you referring? The C4s are made of magnesium, which is porous, and oil is soaking through them -- it's inevitable.

_ken

 

[silver 80]

I thought they only put one type of vavle cover on the L98 engine, are you saying there is more than the one type?

 

[Ken]

Not on the L-98. Just the magnesium covers.

I don't know about the L-83, but the LT1 and LT4 had plastic covers I believe.

_ken

 

[WhalePirot]

L-83s are mag, too, but can be cleaned and painted.

Funny; the car is faster now!

Mike



1984 Z-51 Corvette (white/carmine) 406 cid four bolt, forged crank; 11:1 with aluminum Dart Pro-1 heads
FMS injectors- 30pph @45 psi; BBK 52mm Lingenfelter Superram plenum, runners & base
Comp hydr. roller- 230 intake; 236 exh @.050
TPIS long tubes feed 3" system through new, stock '84 Vette cat to Flowmasters

Bilsteins revalved to 'Challenge' specs Heim jointed 3.73:1 rear; poly, poly everywhere
strengthened: super T-10 and Doug Nash O/D
Optima battery, inside behind passenger 'export' taillights
new leather/cushions/wood dash/wheel

 

[*89x2*]

Not on the L-98. Just the magnesium covers.

I don't know about the L-83, but the LT1 and LT4 had plastic covers I believe.

_ken

92 LT1's had similar "magnesium" covers... 93's Went to "plastic" (don't let the "purist hear you call 'em plastic )covers

 

[Ken]

:L