mikewilkinson

hey guys,
have a 2001 cobra with a procharger. engine has been smoking for 100 miles. compression check showed 75 on 3 and 0 on 4. what could be the problem and how much am i looking at to fix it?
thanks

2002GTAUTOVERT

75 psi i guess and o psi on cylinder 4?? sounds like you burnt a valve, lost a seal or your rings are gone. if its smoking i would try not to drive it. only way to be sure is to take off the cover and look at the heads, and check the bottom end for metal shavings in the oil. could be anything causing low/no compression, need more info.

oxfordgt

Are you sure you did the compression check correctly? What did all fo the other cyl say?
If those are really your numbers they it is time for a rebuild. With 0 compression in one cyl then your rings are gone and probably have broken ring lands. I wouldnt run the car anymore till you tear it down.

code3GT

Gonna be expensive. On the cylinders with 75psi and 0 psi...put a few drops of ATF in the spark plug hole. If compression comes up, it's the rings.

BuzzCut

Busted a ring land and best be ready to spend some big cash. Blowers on hyperpathetic (stock) pistons and stock aluminum backed main and rod bearings are a ticking timebomb.

mikewilkinson

this isn't my car, but i was looking at buying it. i've been looking for a supercharged car but can't afford the '03-'04 cobra's. should i avoid any supercharged stock 2 valves? thats what i'm interested in. what should i look for to be safe? low boost, or a completely set up dss block and forged internals? i don't know really what i'm looking for except a good priced supercharged mustang under $18k any suggestions?

2002GTAUTOVERT

supercharged stock 2 valves, and any other superchaged vehicles are a much higher risk than any N/A vehicle, its common sense that since someone put F/I on a car, they did it to make it faster = harder driving = more worn parts in the engine and tranny.