1997 Possible HG Failure - Page 2

tblake · #16 01-25-2009, 07:22 PM

tough break man,

I would pull the head off again, take it apart, check it out (whether it be a burnt valve, kissed the piston, foreign material in the combustion chamber ie spark plug tip, or like magic rat said)

Either way, you should be able to salvage the head, just replace the valve, have a machine shop do a once over and slap it back together.

I'd buy a new head gasket. SOmetimes you can find a shop that will sell you just 1.

DieselHilux · #17 01-25-2009, 08:39 PM

I pulled the head already, the valve sounds like sandpaper if you spin it in the seat. The combustion chamber looks good tho.

Autozone and rock auto will both sell me just the one HG for about $20

I am pissed at myself for not doing a leak down test BEFORE I pulled the head to see where the compression (65 #'s of it) was going.

So now I costed my self $20 and alot of agrivation.

tblake · #18 01-25-2009, 09:21 PM

yeah, its ok. Happens to the best of us. Heck, my friend and I had to pull a motor apart twice, once because of a blown head gasket, and the second time because some loser threw a bolt into the LIM port while we were working on another vehicle waiting for the right injector o-rings to be delivered. The second time around it needed two new valves, and the piston was pretty marked up, but we still used it.

doctorhrdware · #19 01-25-2009, 11:14 PM

In my younger days, we use to pour bb's down the carburetor. The noise the car made it was so funny. I wonder how much damage that did to the engine. Would that put dents in the top of the pistons?

BNaylor · #20 01-26-2009, 01:05 AM

Interesting thread with a lot of speculation so I guess I'll add my two cents worth since I have been modding and building engines for over 35 years.

If the intake valve is bent the only way that is going to happen is if the valve hits the top of the piston. The most likely explanation is due to overheating caused by the original issue which was the bad UIM and LIM gaskets. With overheating valve stems can swell which will cause the valve to stick in the guide. If the valve sticks open then it will hit the top of the piston. Also, in most cases you get coolant contamination in the crankcase and engine oil. As a result it will cause issues with the lifters and do the same thing.

Quote:

Originally Posted by doctorhrdware

In my younger days, we use to pour bb's down the carburetor. The noise the car made it was so funny. I wonder how much damage that did to the engine. Would that put dents in the top of the pistons?

DieselHilux · #21 01-26-2009, 06:46 PM

I am going to just get a head from a junkyard. i dont wanna wait to have the head fixed when I can just go and get one that will work.

Will any 3800 series 2 head work on my car???

BNaylor · #22 01-26-2009, 08:10 PM

Quote:

Originally Posted by DieselHilux

Will any 3800 series 2 head work on my car???

Not any. Only one from a L36 VIN "K. The VIN "1" L67 (supercharged) heads will not work since the fuel injectors are located on the cylinder heads along with some other minor changes.

DieselHilux · #23 01-27-2009, 05:11 PM

Ok but any N/A series II head would work??

DieselHilux · #24 02-06-2009, 08:32 PM

Hey a little update......i bought a new intake valve and lapped it into the head, bought and installed a new HG and New Head Bolts.

Got it all back to gether and did a compression test, 180psi on all three cylinders...YAY.........or maybe a little too early to celebrate............

Let me explain:

I did a compression test wile cranking the engine, wile the cylinders did build compression I neglected to do a leak down test with shop air BEFORE I installed the LIM, UIM, ect.....

Well the *** valve leaks as does the other two cylinders on that *** head!!!!!

SO it runs on three cylinders 2,4,6 AGAIN!!

So now I am out another HG and 8 More bolts, i am going to get a re-man head from auto-zone and a new HG AGAIN and new bolts AGAIN and hopefully this will be the last time this happends.

The head is $200 comes with new valves, springs, seals and a 1 year warranty.

The HG is $20 and the Bolt set is $20

That will bring me up to $825 spent on the car so far.

Not bad except that I bought this car to fix and sell and now i will have to sell it for more in order to make a profit from it.

Still I have fun learning and I am now an expert on the upper part of a 3800 Series II engine lol.

tblake · #25 02-06-2009, 11:57 PM

Quote:

Originally Posted by DieselHilux

Well the fucking valve leaks as does the other two cylinders on that damn head!!!!!

SO it runs on three cylinders 2,4,6 AGAIN!!

WHats this mean? I thought it ran on 5 of 6 cylinders initially, and did you buy a used head or just put a valve in your bad head?

Why would replacing a valve on one cylinder cause the motor to not fire on 1/3/5? I guess I dont understand.

DieselHilux · #26 02-07-2009, 03:52 PM

Sorry it was running on 5 cylinders orrignally however the front two that were fireing were not 100%.

Now I lapped in a new valve and tried to lap the others as well to get a better seal.......that didnt work as well as I hoped and now none of the front three cylinders are contributing.

I am gonna get a used head form a junkyard like I should have done to begin with. $75 with a 3 month warranty but I gotta get ANOTHER *** HG and Bolts but w.e. at least this time it will be the last time.

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