The plot thickens.
I am in the process of putting the second hand motor in my MPFI EA Ghia at the moment. Today I pulled the head off my old engine and was very surprised at the condition it was in! Very good really.
The problem I had was low compression in 3 cylinders, especially cyl 6. Looking at the bores cyl 6 still has the pattern from honing visible, meaning the engine had already been rebuilt at some stage (unless its been there since new which I doubt), but that also means the rings must have been leaking ever since it was rebuilt because the rings were not tight against the bores, well that my guess anyway.
The old motor was also playing up when it got hot. It was missing badly under load and severely under powered (at one stage I couldn't pass a B-Double truck loaded with cattle!! lol). It also sounded like it was sucking more air than normal, sounded like the air box lid was removed. I put all this down to the rings (do they normally cause those type of problems??), but when I got the motor out and pulled the intake gear off and had a look at the dizzy, I was shocked! The cap was corroded to the crapper, the rotor was almost non existant and the coil lead was split in several places. So me thinks that was a lot of the problem! But the problem occured suddenly, not over time.
Anyway, the head off the old engine is just about immaculate! Theres no oil goo anywhere!! Compression chambers have a bit of carbon, but thats normal. The bores have a tiny lip at the top, but can hardly be felt.
How long do you guys reckon it'd take to change the rings in the old engine and whats the cheapest way out of it (doing it myself)? It seems as if my old motor is in A LOT better condition than the one I just bought. New one has 3 month warranty on so I plan on getting the old motor back in action before the 3 months is up.
1992 AXII Telstar TX5 Ghia
121kW 2.5L DOHC V6 in a car that weighs 1100kg's and looks like a 4 banger from the outside......SLEEPER!
1988 EA S Pak 3spd CFI.....Soon to be a 250rwkw HSV eating machine.