Camshafts on 3s-ge

[duff99]

Can any one tell me?

87 3sge. On the camshafts there is a number 1 and 2.

Which is the exhaust camshaft and which is the intake camshaft?

Thanks

[dansgts]

not positive on this, but i believe that the front cam near the exhaust manifold is the exhaust cam and the back cam near the intake manifold is the intake cam.

[duff99]

I appreciatte your help and you are right. But, that is not what I am asking. The cams are very similar and both have a number engraved on the shaft either a 1 or 2. I want to know which is the exhaust and which is the intake based on these numbers?
thanks

[RioCyber]

one with the "notch" for the distributur is the intake cam. Just use your eyes ,. u cant put them wrong, if u use eyes and brain NHF

i cann put some pictures if needet

[blck87gtconv]

RioCyber said:

one with the "notch" for the distributur is the intake cam. Just use your eyes ,. u cant put them wrong, if u use eyes and brain NHF

i cann put some pictures if needet

haha..

he's right. Just look on the non-gear end of the shaft and look for the distributor notch. That's the intake camshaft.

[duff99]

Both cams have a notch for the distributor. The mistake was made at the machine shop and they dropped the cams in the wrong places becuase they are so similar. It turns out that only one will allow you to line up with the right firing order(one starts off at 4 and one at 1). Its not brains though its called going from changing oil and alternator at most to doing an engine swap. The cams were sent out to webcams to weld and regrind the lobes and they never marked them. Thanks though.

[blck87gtconv]

okay, if i find the time, I'll take a look at mine tomorrow and let you know which valves are open on which cylinders when the camshafts are aligned at TDC.

[trd3sg]

turn the motor over by hand til its at tdc - compression stroke for number 1 piston - this will then tell you that the cam lobe for the inlet number one piston should be facing directly down - ie, put both cams in there and see which one faces down when its at tdc for # 1 cylinder - this is the inlet cam - other other is then exhaust cam ;D

[mrgud]

Off topic... I heard that a 3rd gen of 3sge motor had camshafts that had 0.5mm bigger hills, (more opening of the valves by 0,5mm), and thicker camshafts, longer time of valve oppening. Does anybody know is this true?

[Jeremy]

yes the later gen ge's had more agressive cam profiling.

[mrgud]

mmm smokeing! i found some for just 100€