PCM questions regarding L67 Swap into VY

[VYL67L03]

Ok Kool

[VYL67L03]

With the heads when I bought them the bloke said they were in good Nick I cleaned them up got new gaskets and bolts the valves didn't leak, I also bought new mace rocker bolts and put them on all torqued down to specs for the heads but with the rocker bolts I just kept tightening until they stopped turning pretty tight, could this have anything to do with not starting, pretty sure I followed the head bolt torque specs correctly but my torque wrench is on its way out I've just been thinking maybe one of the cylinders isn't sealed properly...but I don't think so, I don't know lol

[VYL67L03]

Anybody please help ??

Thankyou

[VYL67L03]

Could rocker bolts being too tight prevent an engine from firing up ??

Much Appreciated !

[Gampy]

I do not know the engine you are working on, however I do know about engine assembly.

Replacing the top end on an engine is not something that should be done by a novice without assistance (or a great understanding of) and/or without proper tools that work properly.
Using a wanky torque wrench is a huge mistake if not a fatal one, head bolt/stud torque is extremely important on a N/A, on a boosted application it is critical!

I do NOT know if it is a Zero clearance engine or not, If that is a Zero clearance engine and you have tightened the rockers down to tight you have likely already destroyed that engine (valves/heads).

With that said, I would allow someone that does know that engine to assist you before you do anything else.
And I also recommend you do some reading on how to properly set/adjust the valves on that engine.

To my earlier comment about the Vacuum hose plug ... Temporary is a Permanent Problem!

[VYL67L03]

All good mate I'm pretty mechanically minded it's not hard to remove and install cylinder heads if you know what your doing...

[VYL67L03]

Lol engine is not destroyed not sure you understand what im talking about.

[vs ss]

I do not know the engine you are working on, however I do know about engine assembly.

Replacing the top end on an engine is not something that should be done by a novice without assistance (or a great understanding of) and/or without proper tools that work properly.
Using a wanky torque wrench is a huge mistake if not a fatal one, head bolt/stud torque is extremely important on a N/A, on a boosted application it is critical!

I do NOT know if it is a Zero clearance engine or not, If that is a Zero clearance engine and you have tightened the rockers down to tight you have likely already destroyed that engine (valves/heads).

With that said, I would allow someone that does know that engine to assist you before you do anything else.
And I also recommend you do some reading on how to properly set/adjust the valves on that engine.

To my earlier comment about the Vacuum hose plug ... Temporary is a Permanent Problem!

What’s he suppose to use to do up the head bolts up? A fuckn rattle gun?? If the service manual from holden says to do bolt-a up with b-a tension wrench to the torque of C what do you do? Oh that’s right I have my wheel brace in the back of the car. Maybe it calls for an angle meter instead and in that case maybe he used one? We don’t know as no one has asked. He did do the rocker bolts up without the correct tension but I I think most of us have done that! Good on ya for giving it a go.

No they are not an interference engine.

The factory rockers are meant to be tightened all the way down and proving everything is oemYou should be ok. The lifters will have to bleed down but by the amount of turning over it should have done that by now. They run a zero lash been hydraulic and you can normally feel if the are ok by grabbing the pushrod between two fingers and see if it spins with slight drag. You will have to check that both valves are shut before doing this.
As mentioned it’s getting to the point where you might need someone to help you. Have you got a compression gauge? Have you tried spraying shit into the throttle body?

[Gampy]

What’s he suppose to use to do up the head bolts up? A fuckn rattle gun?? If the service manual from holden says to do bolt-a up with b-a tension wrench to the torque of C what do you do? Oh that’s right I have my wheel brace in the back of the car. Maybe it calls for an angle meter instead and in that case maybe he used one? We don’t know as no one has asked. He did do the rocker bolts up without the correct tension but I I think most of us have done that! Good on ya for giving it a go.

No they are not an interference engine.

Your poor attitude and foul mouth doesn't help the OP.

A proper tool in proper working condition is what's called for in any manual worth a darn.

He openly admits his torque wrench "is on the way out" ... That is a wanky (messed up, bad, broken) torque wrench so your smart ass comment is un-warranted.

Thank goodness it is not a zero clearance engine.

[vs ss]

Yeah coming from such a big man that only seems to post in people’s threads to people to put shit on them. There is a lot of people experimenting and learning, so give them some help and encouragement.Maybe his tension wrench is out, but far enough to blow a gasket out on first start up? Who knows but we are going through process of elimination and that’s why I asked if he had a compression gauge. Then I asked him to put some starting fluid down the intake to see if it fires up, then we know it could be pcm/tune or fuel. Where not all as smart as you! Take a look at your own attitude cause you jump up when someone says something you don’t agree with. At least I’m trying to help the op by getting details so I can try and work out what’s going on! What did you do? Just got on here and shot him down! I need the attitude check? Come on.
Sorry about this op.