the engine is new.bored .030..stock cam.ran good,but overheated immediately.only 60 70 mph travelling on highway kept temp at bay around 210 degrees.at first,i thought the 4 blade fan and 2 core factory radiator were not enough.the engine i had put around 100 miles on so far,ran great.but was driving it a few days ago.it bent a pushrod on number 4 cylinder.i changed that.adjusted the rocker with car running.backed off till it clattered.tightened back down 1/2 turn.now engine runs all crazy.it runs like several plug wires are switched around and still overheats badly.all wires are on right.tdc rotor is pointing to number one.so timing is correct. i want to go through entire valve adjusting procedure.i'm thinking engine builder tightened them all to tight.perhaps this causes the overheating.but.i cannot find anywhere on this big internet.a picture of which rocker arms are exhaust or intake.i see many places telling which to adjust but no one telling which is exh. or intake.help please.
2006-07-28 20:33:18 · 4 answers · asked by shelby m 1 in Cars & Transportation ➔ Car Makes ➔ Pontiac
Pontiac 350 valves run from front to rear EIIEEIIE.
2006-07-28 21:31:55 · answer #1 · answered by Gary W 1 · 0⤊ 0⤋
The answer about the valve placement is correct.
As for the overheating... 210 is not overheating, but if you're hearing heat noises you definately want to have a look at some things.
Are you running a proper mix of antifreeze & water? Straight coolant doesn't cool all that well.
Does the rad look good internally? Any corrosion around the tubes? Clean as necessary.
Are you running a t-stat? If not, water is going through the rad too fast and it won't cool.
You may be running 'lean', meaning your air/fuel mix doesn't have enough fuel. this will cause a very hot engine.
First, replace the t-stat, yours might be bad.
Those are the simple things. If none of these helps, you may want to find a mechanic...
2006-07-29 08:30:14 · answer #2 · answered by InjunRAIV 6 · 0⤊ 0⤋
I've had the same problem in my 67 Lemans. Has a 350 in it also. I cured all cooling woes with a new water pump and and aluminum radiator. Also you may want to make sure that your divider plates and coolant inserts are in your timing chain cover. that can cause a few problem. as far as the valve train i bent 2 push rods it sucks. If 350 is mostly stock. you have non adjustable valve train. how you adust your valves is torque them to 20-ft pounds. that should keep you from bending rods and help it run better. your valves are in this order
ex int int ext ext int int ext. hope this helps
2006-07-29 09:55:50 · answer #3 · answered by turkey 6 · 0⤊ 0⤋
OK!!! I'll tell my old man about your problem, wish I had an EM add for you so I could hook you up. My husband bores blocks for a lifetime and I'm sure he could help you out! printed out your Q so EM me and I will get back to you on this!
2006-07-29 03:57:09 · answer #4 · answered by Anonymous · 0⤊ 0⤋