Ok people, my brother and I ran a compression test on my 1989 V6 because of crappy gas mileage and lack of "ooompf!". Here are the readings on the cylinders.


FIREWALL
175 --- 75
25 --- 175
175 --- 160

FRONT OF TRUCK HERE!!!

The compression problem is also manifested in a repetetive tick from the passenger side wheel well (where the 25psi cylinder is). That particular cylinder also has a blackened spark plug (and I just replaced the spark plugs on the 20th!)

So what say you, fellow Yotatech members? What couldeth be the problem?

 

Looks like worn rings or improperly seated valves.... Or you've managed to blow both HG's at the same time.

 

What ChickenLover sayeth. How manyeth mileseth on this lil puppy?

(Apologies to Bill Shakespeare)

Mike in AR

 

just crossed 149k

we did a "wet" test on the 2 cylinders and they were not indicative of worn pistons... or something. So I am guessing headgaskets, which Toyota has already replaced once (I am the third owner, so I will ask the previous owner when it was done)

 

Are there any other signs of a blown HG? Milkshake, green goo under oil cap, loss of coolant, lots o' steam out the tail pipe?

 

I think you can call the dealer to find the exact date of the HG recall work.

 

no green goo, but there is a lot of white smoke and lots of water coming out as wel.

 

out of the exhaust? does it smell sweet?

 

ohh noes... I just bought a 95 4Runner with 150k miles and the dealer insisted I didn't wasn't eligable for a head gasket recall but I do get sweet smelling exhaust, mostly when cold but there is a small amount when warm... I haven't done a compression test though... were the above signs very indicative of a blown HG?