not to brag, just here to help... any questions or unsolved mysteries? i can just about answer anything about these little engines- i love them, i have owned 23 lol -
valve noise
very rare in my opinion. valves cannot be adjusted, only replaced. if you have a sound like a tap, its one of two things: cam gears or a lifter not priming. i covered the timing gears below. valve seals are a common problem, leaking and causing a fuss with smoking and burning oil. how to change them: remove the breather, remove the valve cover with a 10 mm socket. remove the spark plugs and take off the battery cable. start with cylinder 1, turn it so that it is tdc (top dead center) and find a about 5 foot of 1/2 inch rope. turn the cylinder so that it opens a little, about half a stroke. fill the cylinder with rope and LEAVE ONE END HANGING OUT, trust me. turn the engine so the it compresses the valves up on the compression stroke, threfore, making your valves stay seated without compression! take a spring comressor lever (i make mine) and compress your springs, remove the keepers with a magnet and DO NOT DROP IT!, pull the valve seal and buy you some new ones, replace the sping and keepers put everything back together and your done! no more leaking without removing the head!
cam gears-
sound like a lifter worn out, ya know, tap tap tap tap at an idle... get the haynes manual for this one!
any questions?
Ill let you know if I need you shortly. I was having a few problems. Also, my work just got a modis scanner from snap-on, Im learning how to use it on my truck. I was having rough idle when cold, then high idle when warm. also, my timing would jump around while trying to time (10-20 degrees in either direction) I replaced the map because even with the vacuum line unhooked, i was still getting jumpy readings. That straightened up my timing problem. But today it acted up again, and I got a check engine light for low circuit or short in coolant temp circuit. So I hooked up the modis and low and behold i got 300* C in the motor (whats that like 600*F?) I just replaced the coolant temp sender in the front of the motor with a brand new GM one, so I know thats good. I actually cut the 2 wires going to the ECM and it still read 300*C. So i ran the service numbers on the ECM, low and behold its for a freekin trans am with a TPI 305. The idiot that worked on it before me replaced every single electrical part on the truck except for the bad one, sometimes replacing them with the wrong one (coolant temp sender and ECM) So Hopefully the junkyard is open tomorrow. HERES ONE FOR YA RIGHT NOW!!!! Can I use any ECM with a 2.5 manual for this truck? I was picking through a Fiero with a 2.5 in it. For the 1st time in 5 years the closest j-yard to me had no s-10s or blazers! Also, considering I dont know the proper ecm service code for this truck.
the 2.5s are dependable, noisy little work horses, not hot rods. the will last a while if taken care of, which means some work, not as much as other models but they do need their share. every thing is fairly simple to work on, very basic if i may say, and repairs cost minimun, not many parts to change.just registered. iam looking to buy my first truck, and just waiting for a good s10 to come up on craigslist, i want one that has a good engine and thats about it, so i am coming to you for advice to tell me how these engines are, are they bullet proof or if not cared about break down easily. because its been a headache finding one with low kilometres/miles. and iam just wondering if a s10 with high miles have problem after problem.
i know if any engine is cared about they want last very long but generally how durable are these engines.
thanks
i know its odd, but have you checked your air filter or your injector?2.5l suck for power, if you just want good gas mileage from a 1st gen and dont care about speed power, or exhaust, go for it, otherwise get a 4.3l
on a sidenote, i just checked my fuel mileage, 14mpg CITY, driving like a grandma, not bogging the engine down or anything.
im hoping its just the weather, because i know theres a diffrence when driving the truck 5 blocks when its 10F out compared to 60F, but getting 14mpg city is worse than most v8!
so plugging in my old coolant temp sensor into the water neck, did nothing.
thanks for the input.... so basically if they were takin care of, they should be fine to buy with high mileage.
i keep it in there, usually transmission fluid has a high viscosity and doesnt hurt the oil becuase it itself is oil. it also will wick itself into your seals eventually, doing your seals some good.cup of transmission fluid? Ive heard of this before, do you keep it in there or do you change it after awhile?
You might be hearing the injector pop off,just dumped in some tranny fluid into my oil, 1 cup, we'll see what effects it does, ive been having valve? noise ever since i got the engine, with the aircleaner lid off you can hear it ticking, not sure where its coming from but its there.
i have valve stem seals, but me and my father didnt want to mess around trying to get them in.
Yeap,
My injector with the air cleaner top off sounds like 2 skeletons fornicating on a tin roof!
willie