Symptoms of blown intake gasket?

[VKCOMMO]

Hey everyone

Just wondering what the symptoms of a blown intake/inlet mani gasket are?

Vehicle is a VP V6

VKC

[VNVacationer]

One symptom is misfiring at idle, you can check by running some oil around the intake manifold gasket, if its that try tightening the intake manifold down some more or replace the gasket.

[VK SL 3800]

Oil in coolant, coolant in oil, blowing white smoke, blue smoke in extreme cases, rough idle, milky goo under radiator cap and oil filler cap. Pretty similar symptoms to blown head gaskets.

[Pub247]

you find that v6's tend to blow between water jacket and inlet ports so most common would using water and steam water in exhaust

[89vn_Jai]

Oil in coolant, coolant in oil, blowing white smoke, blue smoke in extreme cases, rough idle, milky goo under radiator cap and oil filler cap. Pretty similar symptoms to blown head gaskets.

He isn't asking about head gasket

[Morton]

you find that v6's tend to blow between water jacket and inlet ports so most common would using water and steam water in exhaust

^ this.

Also, water seeping into ports overnight can lead to hard starting in the morning. Followed by steam, as Pub said

[hi_ryder]

ive done my inlet manifold gasket and put in a new radiator (SSS), and even ran some flush additive in the radiator for a couple days then put in some green cordial the 100k stuff. ive noticed im still getting a little of that goop under the cap.. and the overflow reservoir was chockers with goop too.... its some kind of oil not sure though... maybe ill post a pic.... all htis stuff has like 20- 30 thou k's from being changed...

[Morton]

That goop is natural for a cooling system that hasn't been well mantained. It's good that it's slowly coming off, keep flushing the system and refilling, so the goop doesn't clog your galleries and heater core.

In the mean time, between flushes, simply add corrosion inhibitor, rather than coolant. It's cheaper, and you don't need coolant unless you go to the snow.

[VKCOMMO]

My symptoms are down on power a little bit, really hard to start every morning, as well as any time the cooling system has pressurised up, no water in oil, no oil in water, White smoke/steam from the exhaust, exhaust smell is a mix between petrol and water... oh, and im losing quite a bit of water but there are no visible leaks (im probably losing 1-2L a week)

My thoughts is either inlet or head gasket is letting water into the cylinder..

The reason I said inlet at the start of this is because it doesnt have the head gasket symptoms that ive heard about (couldnt get a straight answer on inlet), being oil in water, water in oil, severely down on power, bubbling coolant when the rad cap is off (from engine compression leaking into it)..

[ucwepn]

I think mine might have a blown intake gasket and to top it off weeping injectors, gonna get this all fixed next week hopefully. Using all the water in about 2 weeks, muck in the coolant and way down on power. oil looked healthy at last change (no foam or water in it), no little bubbles coming from radiator when running with cap off. Hopefully its not head gasket lol its internally stock and an auto so it doesn't get pushed very hard so hopefully its intake.

[VKCOMMO]

I think mine might have a blown intake gasket and to top it off weeping injectors, gonna get this all fixed next week hopefully. Using all the water in about 2 weeks, muck in the coolant and way down on power. oil looked healthy at last change (no foam or water in it), no little bubbles coming from radiator when running with cap off. Hopefully its not head gasket lol its internally stock and an auto so it doesn't get pushed very hard so hopefully its intake.

That sounds the same as mine, But not severly down on power..

[Morton]

Inlet gasket can be done in one sitting You should both get in there and change them anyway.

1) remove all vacuum hoses and unplug sensors and injectors
2) remove fuel hoses, water hose, and unbolt fuel rail
3) unbolt manifold and lift + remove

4) cover the valley with paper towel or rags, to stop crap falling in
5) clean up mating faces on heads and manifold
6) throw the new gaskets on, they've got tabs so they'll sit in place
7) throw a bit of ultra-copper on the contact faces of the gaskets where they meet
8) drop the manifold back on and tighten up
9) etc etc.

[ucwepn]

nah mine will be going to selectmaz gonna do remanufactured injectors at the same time. I'm not handy with these things lol most i can do is oil and sparkplugs. down on power and using tonnes of fuel getting 220-250km's a tank and its getting worse no error codes either. wanna get it running good to sell and am upgrading to a WH 5.7.

when i say down on power its lacking grunt in 2nd gear onwards. goes hard in 1st and chirps 2nd, i suspect leaky injectors, they are only $150 for 8x remanufactured bosch injectors so worth ruling them out.

[VKCOMMO]

Im definitely doing it myself, Not worth paying someone else to do something I can do...

Mort, you didnt mention any gasket goop???

UCWEPN, Im the same fuel wise, I used almost half a tank doing 170kms..

[ucwepn]

I have heavy 18" rims and 235 tyres so i guess i lose around 50km's of fuel economy with that and allot of stop start driving but its still bad economy for a stock 8 and down on power. These guys even though they are mazda experts always fix my car very well lol they did the welch plugs for me last time and its going good still and they are local and super nice so thats a plus. i destroy cars if i try and do jobs like these haha

[ucwepn]

I'm a tool with cars lol I thought the heater core was leaking because there was heaps of water coming in from under the dash so i got them to bypass the heater core but it turns out the water drain holes at the bottom of the windscreen was blocked with dirt and leaves and heaps of water came in through the airvents I'll facepalm myself for that one will get it reconnected while im there lol

[Pub247]

Im definitely doing it myself, Not worth paying someone else to do something I can do...

Mort, you didnt mention any gasket goop???

UCWEPN, Im the same fuel wise, I used almost half a tank doing 170kms..

Yes he did maybe you should read it again or not do it yourself if you cant follow those basic instructions

[VKCOMMO]

Yes he did maybe you should read it again or not do it yourself if you cant follow those basic instructions

I thought he just meant copper where the gaskets meet eachother...

[Jacko84]

can understand where your coming from vkcommo, i didnt understand him myself to. and yeah it is pretty easy job

[E-T-H-A-N]

Pub247, you dont have to be a #### about it, i didnt quite get it either untill you so rudely pointed it out.

im actually have the same sort of stuff with my vp, i will be doing it myself for sure. seems like a pretty straight foward

mine is low on power,
it overheats way more than most cars should, ive changed the thermostat 4 times, each from diffrent shops too.
uses alot of water and has been for some time now
miss fires pretty bad, i changed, plugs, leads harmonic balancer and its still doing it, really giving me the shits.
also ive noticed the coolant loosing its colour wich is strange.

[328FTW]

Just did mine on the V8 as a preventative measure while I was doing the dizzy etc so everything is nice and new where it's hard to get. Wasn't that bad, car is all back and running sweet as plus I got to clean everything while I was in there. The front and rear seals on the intake were leaking a little on mine to so I washed and degreased everything while in there, went nuts. Feel so much better now and rather than oil full of dirt and hair on everything it's all bright alloy and painted thingos, I love doing stuff like this

I'd assume the V6 is similar, I think I did one yonks ago and a couple beers and some patience will see you through. Fix anything little you find along the way cause with the intake and everything off repairing cracked wiring and busted plugs etc is super easy.

[VKCOMMO]

Pub247, you dont have to be a #### about it, i didnt quite get it either untill you so rudely pointed it out.

im actually have the same sort of stuff with my vp, i will be doing it myself for sure. seems like a pretty straight foward

mine is low on power,
it overheats way more than most cars should, ive changed the thermostat 4 times, each from diffrent shops too.
uses alot of water and has been for some time now
miss fires pretty bad, i changed, plugs, leads harmonic balancer and its still doing it, really giving me the shits.
also ive noticed the coolant loosing its colour wich is strange.

They're my symptoms as well.. exactly actually..

[Pub247]

Pub247, you dont have to be a #### about it, i didnt quite get it either untill you so rudely pointed it out.

im actually have the same sort of stuff with my vp, i will be doing it myself for sure. seems like a pretty straight foward

Lol have a teary about it. I like to give VKcommo shit cause he's an annoying smartarse.

I'm one of the most helpful people on this forum and have provided help in this thread. Ultra copper is one of the most widely used aftermarket sealants in automotive industry its common knowledge bit like VKC being annoying

oh and you couldnt dumb down those instructions anymore than that

[VKCOMMO]

How am I being an annoying smartarse.. Im asking for a bit of help on a car help forum and you're laying shit on me..

[E-T-H-A-N]

okay so it seems i have got in the way of an on going thing haha.

i never knew about the ultra copper being a sealant though, i dont study the packaging lol

i agree they were pretty straight foward, it seems like a simple job to do.