230 not running right

[old cruiser]

Hi guys , here's the deal. My 230 inline 6 is popping thru the exhaust every now and then. I removed 1 plug lead at a time to hear any difference in running. Numbers 5 and 6 don't seem to change the way the engine runs when I remove one of these leads. Next step change leads no change. swap plugs no change . compression test al cylinders between 115 and 120 psi.
Removed valve cover and checked to see push rods loose on these cylinders in their firing position all good. tightened manifold .
Scratching my head, now any ideas ?
Thanks in advance for any imput
Cheers Matt

[old cruiser]

Another ? Is the pcv valve in this model not really a valve ? it looks just like a restrictor , a small hole in 1 end ?

[j.kirn]

Try advancing the timing,check the point gap

[awbrown]

if all the cylinders comp. test the same , then that rules out a head gasket , I would look for a carbon track in the dist. cap .. or pull the wire away from the plug while it is running , if the plug is bad it will make the coil work harder and sometimes may get the plug to fire.. when you shorted the plug wires could you heard it sparking to the plug ? also if you ever have 2 cylinders that share an intake port that dont fire check for a vacuum leak.. just spray some carb cleaner around the intake/head area... I had one last week where someone put the pcv valve in a vacuum port on the rear of the intake in a runner .. that place is reserved for the brake booster... pcv goes under the carb....

[Vernski]

On mine it turned out to be the intake exhaust gasket leaking, these are hard to get sealed up right and torqued down properly. Also could be the round brisket gasket in the head pipe if these let air in it will pop on compression. Good luck...Vernski

[old cruiser]

Yes I can hear spark jumping to ground when I remove leads from plug.
From what you guys are saying its heading towards a manifold leak .
I'll have to check that out when I get a chance. Are there any better manifold gaskets that I can buy ? bearing in mind I don't have the luxury of chev parts in a local auto sparts store.

[Juan]

it might be your timing

[rusty048]

No happy with the answers you got already? Pretty sure youve already asked this question
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[Vernski]

Originally Posted by old cruiser

Yes I can hear spark jumping to ground when I remove leads from plug.
From what you guys are saying its heading towards a manifold leak .
I'll have to check that out when I get a chance. Are there any better manifold gaskets that I can buy ? bearing in mind I don't have the luxury of chev parts in a local auto parts store.

Old cruiser g-day, I just wanted to say that anyway here's a link to look at for gaskets. I don't know what shipping would be to you but here's a source. There may be allot more out there this popped up first....Vernski

http://catalog.remflex.com/CHEVROLET...t_p/rf2034.htm

[68gmsee]

Originally Posted by rusty048

No happy with the answers you got already? Pretty sure youve already asked this question
Posted via Mobile Device

Yeah, post did look familiar.

[old cruiser]

Originally Posted by 68gmsee

Yeah, post did look familiar.

Yes I did post this in the 60-66 section then I remembered there was this forum as well so I thought can't hurt to ask here as well

[old cruiser]

Originally Posted by Vernski

Old cruiser g-day, I just wanted to say that anyway here's a link to look at for gaskets. I don't know what shipping would be to you but here's a source. There may be allot more out there this popped up first....Vernski

http://catalog.remflex.com/CHEVROLET...t_p/rf2034.htm

Thanks Vernski but I'll look around for another source for gaskets Remflex wants $99.00 to send 1 gasket to OZ the product sounds good but shipping whew.
Thanks for your input guys , I haven't been near it today probably get to it by end of week. Wife wants the bathroom finished, apparently thats more important thats what she tells me anyway.

[rusty048]

Originally Posted by old cruiser

Yes I did post this in the 60-66 section then I remembered there was this forum as well so I thought can't hurt to ask here as well

Its posted on this one twice
Posted via Mobile Device

[Vernski]

Originally Posted by old cruiser

Thanks Vernski but I'll look around for another source for gaskets Remflex wants $99.00 to send 1 gasket to OZ the product sounds good but shipping whew.
Thanks for your input guys , I haven't been near it today probably get to it by end of week. Wife wants the bathroom finished, apparently thats more important thats what she tells me anyway.

Yes that seems an awful lot of $$ maybe there is a GM parts dealer down under somewhere. Do a google search in Australia see what you come up with g-day & good luck...Vernski

[rusty048]

Try summit racing
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[rusty048]

Chev places here should have them
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[old cruiser]

Originally Posted by rusty048

Its posted on this one twice
Posted via Mobile Device

Thats because the moderaters moved 1 from 60-66 forum to here.

[rusty048]

Fair enuf :-)
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[68gmsee]

Originally Posted by old cruiser

Thats because the moderaters moved 1 from 60-66 forum to here.

For a minute there I thought it was amnesia... My wife claims I get that quite often these days.

[old cruiser]

Finally got back to it , replaced manifold gasket sounds a whole lot better. thanks guys .
cheers Matt