Author Topic: Head gasket for the 4th time (Read 1714 times)

Frank · « **on:** June 11, 2014, 09:44:25 pm »

The head gasket of my zilla is not tight. always dripping out cool water.
should I let the cyl. surface grind? the bolt out and use bolts 10th? what do you think?

Dezsled · « **Reply #1 on:** June 11, 2014, 10:07:44 pm »

Mark the sealing surface of the head with a sharpie then lap the head using lapping compound in a figure 8 pattern... You will see the high spots if it's warped, cylinder sealing surface may need to be done also

Or if your cylinder head stud(s) pulling out? Post a pic of the top of your cylinder

Head gasket need to be installed counter clockwise one stud to get the restricted holes over the exhaust port?

Frank · « **Reply #2 on:** June 11, 2014, 10:30:29 pm »

The head gasket is installed on the head.

Iceracer · « **Reply #3 on:** June 12, 2014, 05:16:36 am »

Show a picture of the piston. What bore size is the piston?

Buckeye513 · « **Reply #4 on:** June 12, 2014, 05:58:51 am »

Send that head to be o ringed.

ZillaFreak · « **Reply #5 on:** June 12, 2014, 07:14:49 am »

is that pitting on the dome?

Might have other issues causing the head to leak.

Glamisrider · « **Reply #6 on:** June 12, 2014, 09:35:10 am »

Frank stronger studs are not going to fix the issue. In fact if you crank on it too much you can warp the cylinder making it out of round causing wear or seizure problems for the piston.

If you get the head o-ringed you only need 18 foot pounds of torque to seal it.

Also when you get the head o-ringed have them re-cut the squish band & re-chamber the head which will cut down on detonation, especially since you don't run race gas and you drive it on the highway for sustained periods of time (no on & off the throttle).

in my opinion send it to Jerry and it should fix your issue.

Frank · « **Reply #7 on:** June 12, 2014, 12:58:13 pm »

Here is the piston bore size 87,5

The scratches around the dome ?
I think that is an broken piston ring of the damage from the boy bevore.
Send this to jerry have too much shipping costs for me to send this from Frankfurt Germany !
i think the o ringed head is not easy to seal? I have problems with a Powerhead in the past on an other Zyl.
Frank

MotorGeek - Jerry Hall · « **Reply #8 on:** June 12, 2014, 07:36:32 pm »

Quote from: Frank on June 11, 2014, 09:44:25 pm

The head gasket of my zilla is not tight. always dripping out cool water.
should I let the cyl. surface grind? the bolt out and use bolts 10th? what do you think?

[/quot
Quote from: Frank on June 12, 2014, 12:58:13 pm
Here is the piston bore size 87,5

The scratches around the dome ?
I think that is an broken piston ring of the damage from the boy bevore.
Send this to jerry have too much shipping costs for me to send this from Frankfurt Germany !
i think the o ringed head is not easy to seal? I have problems with a Powerhead in the past on an other Zyl.
Frank

The piston looks like it is making contact with the outer edges of the combustion chamber or head gasket. The photos are not from a view point that I can be certain. A piston that that is hitting the head may also cause detonation. Detonation can erode through the metal ring of the head gasket. A piston that is hitting the head can strip the threads in the cylinder. A piston that is hitting the head can also reduce the clamping force the head bolts provide.

Are you certain the gasket surface is flat on the head and the top of the cylinder?

It also looks like one of the flanges on one of the head studs is not recessed below the head gasket surface like the rest of the studs. If this is true that stud may not hold the necessary torque to provide enough clamping force to prevent the head gasket surface from leaking. The threads in the cylinder may be sheared on that stud.

I need the cylinder and the head in my hands to provide any better diagnosis.

Frank · « **Reply #9 on:** June 12, 2014, 08:56:24 pm »

ok, how heavy is a engine? and then I need your address, and I'm going to check the price from here and back by German Post

MotorGeek - Jerry Hall · « **Reply #10 on:** June 12, 2014, 09:45:46 pm »

Lt 500 engine is about 75 pounds. Shipping weight is usually about 100lbs. Check with your international shippers, I use DHL, Fed Ex, United States Postal Service, and UPS for international shipping. The most economical is usually the United States Postal Service but I do not know what their weight limit is.

Frank · « **Reply #11 on:** June 12, 2014, 11:05:46 pm »

Is over 200 €

Glamisrider · « **Reply #12 on:** June 13, 2014, 08:07:42 am »

You don't need to ship the whole motor just the cylinder, piston & head...right?

It's right about 15 LBS and should fit in to a 12x12x8 if you pack it REAL GOOD with lots tightly wadded up newspaper.

There is also the option of using APO/FPO/DPO which is mailing through the united states mail system to a military base, which I know exist in Germany.

https://www.usps.com/ship/priority-mail-flat.htm

Not sure if you need to be stationed at the base or how it works but I know any base is considered US soil and the US postal service will deliver & ship from there.

Any forum members that have served might be able to give you more info on this?

Frank · « **Reply #13 on:** June 13, 2014, 11:34:01 am »

Ok i must check this out Thanks !

Dezsled · « **Reply #14 on:** June 13, 2014, 04:19:11 pm »

Frank you won't find a better builder!

Frank · « **Reply #15 on:** June 14, 2014, 11:44:36 am »

.I know Jerry's the best....f..k the rest.

Ive ripped my head for the 5th Time out.
cleaned the head and the old gasket , and pull it together.
take fresh screws Toolwide 13'th and they've tightened in star shape.
Coolant with bars leakes filled in, and fired up and take a ride in my Town around. And dry!
all but really all were very happy that the zilla makes noises. I'll do tomorrow a smaller tour.
and see if the if the coolant is inside. damn that I have no gopro.

but i have in the last tree Month a new Turbo, a used Engine and a used Gear box
and a lot of little things for the Motormanagement for my 2001 BMW 320d.
Jou must understand
Ive have no Money to put another 2Kilo's in my Zilla.
i plan for the future to buy me a HPR Pipe.

Glamisrider · « **Reply #16 on:** June 16, 2014, 12:29:22 pm »

If you don't have the funds to send it to Jerry you can try a copper head gasket but they are a pain in the a$$, you have to anneal them and use the proper sealant and it'll take a couple of days for the head to seal before you can put any fluid in it.

You can buy them here:
http://www.cometic.com/

Videos on how to anneal them:
http://www.youtube.com/results?search_query=anneal+copper+head+gasket

Make sure you order the right thickness so you get the correct squish.

Nekrofilliak · « **Reply #17 on:** June 16, 2014, 01:15:09 pm »

first thing il do is to get the head and cylinder lapped and change the stud. also watch for crack on the frame

Frank · « **Reply #18 on:** June 17, 2014, 09:39:51 am »

my piston closes at the top dead center with the Zylnder top end.

Iceracer · « **Reply #19 on:** June 17, 2014, 12:46:08 pm »

Do a squish test be sure the solder its touching the cylinder walls. Also does it always leak in the same place? Over the exhaust?

Frank · « **Reply #20 on:** June 18, 2014, 09:46:44 pm »

Jess only over the exhaust, ok i do a sqish test !
The best clearance is 0.59 ?
i have with installed head gasket 2.2 mm !

Iceracer · « **Reply #21 on:** June 19, 2014, 11:20:57 am »

Remove the stud over the ex port and look at the threads in the cylinder. That one stud looks to be flush with the cylinder deck. My guess is it backed out at some point and you didnt notice . Now when you tighten the head down its not applying pressure there.
Or its stripped and needs to be repaired.

Iceracer · « **Reply #22 on:** June 19, 2014, 07:29:44 pm »

Frank · « **Reply #23 on:** June 20, 2014, 12:26:23 pm »

ah yes. I see it ... too bad that I've got it made the head ... nevermind i ve ordered a new Gasket.
I'll measure it to the others. I thank you.

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Author Topic: Head gasket for the 4th time (Read 1714 times)

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