Is it common for GPX to blow head gasket / loose compression

[PHIL069]

Normal cold limiter is at 6k.

What can I say, I got what I got.

If cold limit is at 6k, then you will hit MIVEC while your engine is cold???

[Vectose]

Mivec is disabled. When you pass 5500rpm nothing happens.

[Daniel2019]

You shouldnt know these things

[Astron_Boy]

You shouldnt know these things

You were at 'that' bonfire.

[Nacho]

Took my GPX Mivec FTO out for a 20mins ride this morning at 6am.
Took it to redline a few times on the freeway first and second gears.
Then went back home, parked it. it was fine.

Later at 6pm, went to start the car and it felt like it had lost compression on idle.
Car was struggling to idle and would often stall.
Also there was a strange clunking sound coming from within the motor which kinda comes and goes.

After awhile of putting my foot down on the gas peddle and maintaining idle at 1500rpm, the car is able to maintain idle on its own. (car temp guage is now at the middle, and motor is at ideal operative temp).

I get something similar. Even when the water temp has reached ideal temperature if I hit MIVEC without at least having driven the car for 15-20 mins I seem to lose a cylinder or two. But after driving for another 5-10 mins after that the car goes back to normal. Haven't been able to diagnose coz the problem goes away promptly. Not sure about the clunking sound you get though.

Moral of the story for my car: Don't hit mivec until at least 15 mins of normal driving

[NextLevel]

Hey guys, just an update.

got 3 new ignition coil, and the idle issue is still present.

I check all vac hose and electrical plugs and all are good.

could it be since hitting mivec, the timing belt somehow skipped a tooth?

could this cause the rough idling?

cheers

[NextLevel]

I think my main bearings are shot