I traded a mud truck for this 98 ext cab 4 dr
ran good other then the miss and smoke
did a comp check
drivers all 150 psi
pass 130 134 0 0
so i thought head gasket
removed the head last nite gasket didnt look too bad?
will be cleaning the pistons tonight
lots of carbon on #8 ext & lil on #6
i was going to clean the valves and re lap them
any advice? tks BOB

 

oh 1998 360
135,000 miles
should i worrie about the rings?

 

Check the head for cracks between the valves too.

 

zero and zero?

even a leaking head gasket and cracked heads would compress some, would they not?

 

Maybe. Being as how the problem is on adjacent cylinders, certainly does point to a head gasket failure....... You can check for evidence of such a leak just by looking at the mating surfaces between the two cylinders. If there is any soot, etc, there's the problem. Using a mechanics straight edge, and checking flatness of the head/block would be a real good plan here.

 

my gauge tester starts at 10 psi both were below that
and # 6 had no psi
#8 had very little when i reliefed the pressure not enough to move the gauge

 

Either way, I'd say you have to pull that head and check. Could be bad valves do to a bad plenum.

 

Well found the problem. Bad plenum gasket, making #8 run lean & burn't the edge of the piston. #5 not sure on, I have a short block already. Just got to take the heads in & get checked out

 

Good luck on getting the heads checked.

Don't mean to stereotype, but our Magnum heads are crack-a-holics..... They are seriously addicted to crack-ing.

I hope yours come back okay, but if not:

There are a few great aftermarket heads available. Search the forum for the ones that are recommended.

But if you are on a tight budget, I've heard great things from Cylinder Heads International. They sell rebuilt heads for cheap! Google them for their website.

Hopefully you won't have to use my advice...

-JT

 

Well my 2nd set of heads - cracked darn
now i need a new set.
should i go with eq?http://cgi.ebay.com/ebaymotors/NEW-E...Q5fAccessories
or chi?
rh?http://cgi.ebay.com/ebaymotors/MOPAR...Q5fAccessories