Page updated on 10-23-2017

Dealership Problems__Intake Manifold


Designer5
06-12-2007, 08:14 PM
Ok so my engine was overheating and idleing high. I replaced the thermostat, radiator and hoses, fan clutch, and still over heating. Took it to the chevy Coggin dealership to have them take care of it. Might be my biggest mistake.

They called me, "you need to replace idle motor, and idle sensor, and replace the egr gasket, and flush the intake" so i say go ahead $600, just wanted to get it over with.

they call "you car is done and running alot better but your upper intake manifold might be leaking, not serious but might want to consider replacing it" so it go and get the car, start it up to find a high idle, test drive down the road engine light back on. so i go back with rage.

I tell him you just replaced a bunch of part $600, and fixed nothing, it still over heats and still idles high. I told him that "I feel like the threw parts at my car and wasted my money, you prolly replaced everything and flushed it out and then found a leak in the upper intake. So he say no worries i will take care of you in the morning

get a call in the after noon today, well took the manifold apart and found coolant inside th manifold. The said they rarely ever see anything like this. I am like ok well what wrong then now, the say they don't know, a cracked manifold, leaking through the screws or the lower gasket is bad. I go and check it out since they had it toren down and see the coolant in the manifold and the brittle gasket. they said they now will hook it up and pressure test the system to see if it leaks in to manifold. if not sudden leak then they will leave it over night to see what accumelates.


So i have paid $600, does anyone think i am getting screwed or have anything to say about what they are doing? any thoughts on what could be wrong? what should i do?


Sorry for long post

blazes9395
06-12-2007, 10:26 PM
Flush the intake? What did they flush? It sounds like they really didn't diagnose this one properly. It should have had the cooling system pressure tested since you were overheating right off the bat. The 4.3L are common, as like many other GM's for intake gasket problems. This sounds like the common intake gasket failure to me.

Also, they took the manifold off and now are reassembling it, with the old gaskets, to pressure test it? Did I get that right? I don't understand, thats very wrong. If its apart already, the gaskets need to be replaced, the intake can be checked visually at that point for any cracks/leaks, and hopefully that was the problem. In my opinion, again I'd say the gaskets are bad.

Chris Stewart
06-12-2007, 10:43 PM
I don't remember you saying you were losing coolant.

Designer5
06-13-2007, 07:55 AM
Blazes9395
The upper gasket is def bad, they only have the upper portion of the intake off. Inside they have found a little bit of coolant. They said it could be from the screws of from the lower intake gasket. So they are hooking it up to pressure to see where the leak is coming from or how the coolant is geting inside the intake.

Chris-Stewart
Thats the thing I haven't been loosing coolant. This had to of happen within the last few days. its only about 1 to 2 oz. but they said this seems rare, what could be causing it, lower intake gasket, screws need to be re-sealled? Could this also be causing it to overheat as well.

I feel like i should have to give them anymore money, since i have given them $600 for nothing already.

MT-2500
06-13-2007, 09:16 AM
Sounds like the dealer put the wash boy on the job of fixing your truck.

Tip on going to the dealer
Ask that only a factory certified gasoline engine performance specialist work on your car.
Not all dealerships are concerned with how repairs are dispatched, and not all dealership techs bother to take advantage of the training offered by factory (the vast majority of which is paid training). If the dealer is uncooperative, ask for your money back and call around for a dealer that will accommodate you.

With that being said.
I would tell them to fix it on there dime or demand your money back.
4.3 V6 right?
What year and mileage?
The usual problem on the V6 is bad intake gaskets on them.
But.
Proper testing and inspection by a good tech is in order.

Good Luck
MT

Designer5
06-13-2007, 09:22 AM
1995 4.6L, 134,000miles

if they are replacing the top gasket, you think they should replace the bottom gasket also with the diagnosed problem of coolant on the inside of the intake, they said they can't get more coolant to flow into thier with pressure on it, this maybe because the engine isn't hot though (expansion and Contraction)

MT-2500
06-13-2007, 09:45 AM
A 4.6 is a ford engine.
What is the first 10 of your vin no?
Proper testing first.
The upper intake leak does not sound right to me?
Why did the engine light come on?
What was the code no?
Was the engine still heating up?
Was it heating up from low coolant or just heating up?

You are justing getting in deeper there.
If it was me I would just ask for my money back and find a good repair shop.

Check around Ask around
Word of mouth.
Family friends coworkers neighbors business people and delivery people.
Mailmen and parcel delivery people get around and notice a lot of stuff.
Even a good parts house knows what shops are good and not good.
Chamber of commerce and better business bureau and city hall.
If you find a good referral to a repair shop go look them over and talk to them.
Look for a clean looking busy place with nice people running it.
Ask a few questions and ask about their qualifications and training.
Not all places have trained tech/mechanics.
If they do not find a place that does.
Even all dealers do not have all trained techs/mechanics.

Designer5
06-13-2007, 10:16 AM
Sorry 4.3L my mistake
the code for the light "P0507" engine high rev

they are putting the new upper gasket on and putting it back together to see what happens.

i replaced the radiator,thermostat, rad cap, myself, also got it flushed for 2
hours, still over heating. then i replaced the fan clutch, no luck thier.

Took it in to dealer and had them look at the high rev "engine light" also

So i guess i will see how it runs when i get it back and if not good then will raise hell to get my money back.

MT-2500
06-13-2007, 10:26 AM
Sorry 4.3L my mistake
the code for the light "P0507" engine high rev

they are putting the new upper gasket on and putting it back together to see what happens.

i replaced the radiator,thermostat, rad cap, myself, also got it flushed for 2
hours, still over heating. then i replaced the fan clutch, no luck thier.

Took it in to dealer and had them look at the high rev "engine light" also

So i guess i will see how it runs when i get it back and if not good then will raise hell to get my money back.


Good luck and let us know how it goes.
MT

Designer5
06-13-2007, 10:55 AM
another quick question, could the upper or lower intake gaskets cause the engine to overheat. They said that the upper gasket would have nothing to do with it overheating, that is a different problem.

I am pretty sure the lower would have something to do with overheating.

Thanks again

MT-2500
06-13-2007, 11:25 AM
another quick question, could the upper or lower intake gaskets cause the engine to overheat. They said that the upper gasket would have nothing to do with it overheating, that is a different problem.

I am pretty sure the lower would have something to do with overheating.

Thanks again

That goes back to you need proper testing by a good mechanic to find the problem.
But you did not answer my question.
Was it heating up from coolant lose or other?

If the heating up was not from coolant lose and you have check all other stuff.
Like stat and rad and clutch fan and water pump.
I would ask for a head gasket test.
A chemical block head gasket test.
It will tell you in about 10 minutes if you have exhaust leakage into coolant.
Which would be a cracked head or block or head gasket.
Good Luck
MT

Designer5
06-13-2007, 12:00 PM
Sorry

I beileve that is was not from coolant loss, I have always kept an eye on it and have never seen it low. When having it pressure tested and seeing no leaks, they replaced the thermostat with flush, with no luck i then proceeded and replaced the radiator and cap, refilled properly, and still ran hot. So i then replaced the fan clutch and no luck thier then took it in. throughout all this i made sure that the coolant level was right and nver had to add from disappearing coolant.

THe coolant on the inside of the intake was very minimal, like between 1 to 2 oz's

hope this awnsered your ?

MT-2500
06-13-2007, 12:17 PM
If and when they put it together I would run the chemical block head gasket test on it.
That way you will know if a head gasket leakage or other reasons.

A intake gasket leak will not cause a heat up/run hot unless the coolant gets low.
I can not see the upper intake gasket leaking coolant.
The lower intake is the one for leaking coolant problem.

Run a head gasket test on it.
And go from there.
MT

MT-2500
06-13-2007, 12:22 PM
Has anyone checked the oil for coolant in it?

Designer5
06-13-2007, 12:38 PM
I have checked the end of the dip stick, not milky but a few bubbles right after running, not bubble after siting, when they told me about the intake i told then to check the oil for coolant, I asked when i went in and they said no coolant in oil. but these guys are driving me crazy, they wanted 350 to replace the lower intake gasket,

so hum 300 on top of 600, on top of 450 of my own work, that would be a nice little payment torwards a new car. I am like you guys already had me put 600 and have solved nothing. so i guess we will see what happens at 5pm. maybe i should ask them to test the head gaskets for free

vtmecheng
06-13-2007, 03:32 PM
Sounds to me like the shop threw parts at it in the beginning. That engine is well known for intake manifold gasket leaks, I had the pleasure of replacing my lower one three years ago. Any good dealer should know to check the intake manifold gaskets on these trucks, but thats just my opinion.

MT-2500
06-13-2007, 04:01 PM
To check for coolant in the oil drain a little out the drain pan and have a look at it.
If any coolant in the oil it will go to the bottom after siting over night.
If a lot of coolant in it it will be white/green/pink colored after the engine is run.
You can not expect the head gasket done for free.
But as they say start from the bottom and work your way up.
First things first.
The head gasket is the first test I would run.
And then if it is good work your way up.
Good luck

Chris Stewart
06-13-2007, 05:07 PM
That's a CPI motor isn't it? My '92 is still coolant dry after 190k.

Designer5
06-13-2007, 09:45 PM
thanks MT-2500 and everyone else, i drained about an inch of oil into a water bottle and after 3 hours put it under a light and found a dark red seaperation, about 1/8 of the total amount of oil. looks like dexacool. remeber me saying before, i asked them twice to check or if they checked my oil for coolant, both time yes we did not find coolant, what dumb F#*@'s. I am going tomorrow morning and not leaving without money.

how much does a head gasket job cost, could it be just the lower intake gasket, or is this a head gasket problem. its prlloy not a job to do in a driveway. It seems like the furthur I would go into the engine, the more brittle and delicate parts i would find and would end up needing to replace more than just the gaskets.

i think i am getting somewhere, but i might just get rid of it depending on cost and if its worth it

Anyone want or need a Blazer

MT-2500
06-14-2007, 08:06 AM
thanks MT-2500 and everyone else, i drained about an inch of oil into a water bottle and after 3 hours put it under a light and found a dark red seaperation, about 1/8 of the total amount of oil. looks like dexacool. remeber me saying before, i asked them twice to check or if they checked my oil for coolant, both time yes we did not find coolant, what dumb F#*@'s. I am going tomorrow morning and not leaving without money.

how much does a head gasket job cost, could it be just the lower intake gasket, or is this a head gasket problem. its prlloy not a job to do in a driveway. It seems like the furthur I would go into the engine, the more brittle and delicate parts i would find and would end up needing to replace more than just the gaskets.

i think i am getting somewhere, but i might just get rid of it depending on cost and if its worth it

Anyone want or need a Blazer

Coolant in the oil is usually lower intake gaskets.
Heating up without a lose of coolant is usually head gaskets.
Head gaskets can also let coolant in to the oil depending on how they are leaking.

I would run a head gasket test on it to see if it is a head gasket problem.
If head gaskets are good then go for the lower intake gasket.
Head gaskets can run into 10-12 hrs of labor.
But on a head gasket job you get the lower intake gaskets done with it.
Lower intake gaskets is about half that.
If coolant in the oil do not rive it for the coolant will take out the rod and main bearing.
Good Luck
MT

Designer5
06-14-2007, 08:35 AM
What is the "dealear specified" operating range for my 95 blazer, like 180-210? basically what is the max it should run at.

vtmecheng
06-14-2007, 09:26 AM
once you find they are not being straight with you, like saying they checked the oil when they obviously didn't, its time to call them on it and get as much of your money back as possible. Remember, if you payed with a credit card it is easy to call the credit card company and file a charge disagreement but that is only after trying to get money back from the shop. Then take the truck to a different dealer or independent shop but make sure you talk with friends for recommendations on where to go. I just went through some problems with shops trying to take me and not doing what they said. Remember that you are the paying customer, they should be doing what you want and providing all services promised.

MT-2500
06-14-2007, 09:37 AM
What is the "dealear specified" operating range for my 95 blazer, like 180-210? basically what is the max it should run at.

There is no set operating range.

With a 195 stat the engine should run in the 195-200 degree range as long as the rad and cooling system is good.

Stopped sitting still at stop light with AC on it may get up to 210.
And with a good pressure cap and rad system it could reach 220 with out any problems.
Anything over that spells problems.

The main thing is on the road running tempt.

What tempt is it running?
Does the tempt jump up or jump up fast under a load or on a long hill or pull?

Designer5
06-14-2007, 11:22 AM
well tryed to get money back and thats a no go. He have pe a price on replacing the just the lower intake 330, and the head gaskets for 950. Well i am done servicing this one. Might be a good time to look at a newer car.

It is running at 215 while moving, just over the 210 mark, it will move maybe a little higher while sitting sometimes like 220. But that still doesn't solve the coolant in the oil situation.

Thank everyone for putting up with me. :runaround:

Add your comment to this topic!