Question about 2003 Yamaha YZ 125

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Water is coming out of the cylinder head studs

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Most likely the head gasket. remove it and make sure the surface on the cylinder and head are flat, and replace the gasket if they are good. Be sure to torque the head bolts and tighten in a criss-cross way. (Inspect the old gasket to verify where it leaked.)

Posted on Sep 26, 2009

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1 Answer

New head gasket and water still entering the cylinders. Could that mean cracked block?


cracked head , cracked cylinder liners/block, stud holes not being cleaned out and studs bottoming out giving a false tension reading

Aug 29, 2016 | Cars & Trucks

1 Answer

Have 1996 C1500 vortex 4.3 blowed head gaskets ,replaced head gasket but #4 cylinder is misfiring & only has 30psi & 60psi #3 possible burt valve,burnt piston,compression ring damaged or?


the first thing is --did you do anything with the head ( machined flat-checked for cracks)
did you run a thread tap down the stud holes and blow out any oil,water in the holes
did you inspect the valve heads to see for burnt heads
Why did you replace the head gasket to start with
Low pressure between adjacent pistons indicates blown gasket between those cylinders
to do a head job properly, remove the head and check for warps and cracks ( head machined flat) clean out the threads of the studs and blow any thing out of the holes
next check that all the head studs are the same length and insert each stud in the head so that all the studs sit the same distance above the head before tightening down
next tighten down using the correct tightening sequence so that the gasket is evenly compressed
tighten down to the correct tension or degrees of turn as is stated in the specifications
any piston or valve or ring damage would be restricted to the one piston and would not show up in adjacent cylinder

Jan 01, 2016 | Cars & Trucks

1 Answer

N14 select plusCummings.wont start water and fuel on all 6 cylinder blowes headgasket on first crank newly overhauled


my understanding of your problem that the head gasket keeps blowing as soon as the engine starts.
if that is the case ,the head tension on the bolts is insufficient, the liner is too low to touch the head. remove the head and clean out the stud holes with a thread tap , blow out all muck ( holes filled with water,oil and muck allow the stud to bottom out before reaching the correct tension) and ensure that the stud lengths are sorted so that a stud too long will not go in a short hole requirement
measure the liner protrusion above the block and check with the maintenance specifications for the liner height. from experience i would tip that the holes are not clean

Jan 21, 2015 | Cars & Trucks

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If i need to lubricate cylinder head gasket


cylinder head gaskets have an in built adhesive that glues the head to the block. For this to work it is imperative that both the head and block surfaces are clean. Use an oil remover ( turpentine) . Make sure there is no oil or water in the stud holes as this will ooze out when the studs are being tightened destroying the adhesive properties of the gasket.

Oct 28, 2014 | 2001 Chrysler Sebring LXi

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What is the Head Bolt Torque specs for a 25HP Kohler Pro CV7308?


Heads Secured With Screws
1. Check to make sure there are no nicks or burrs on
sealing surfaces of cylinder head or crankcase.
2. Install a new cylinder head gasket (with printing up).
3. Install cylinder head and start four new hex flange
screws.
4. Torque screws in two increments; first to 22.6 N·m
(200 in. lb.), then finally to 41.8 N·m (370 in. lb.).

Heads Secured With Mounting Studs, Nuts, and
Washers
1. Check to make sure there are no nicks or burrs on
sealing surfaces of cylinder head or crankcase.
2. If all studs were left intact, go to Step 6. If any studs
were disturbed or removed, install new studs as
described in Step 3. Do not use/reinstall any
loosened or removed studs.
3. Install new mounting stud(s) into crankcase.
a. Thread and lock 2 mounting nuts together on
smaller diameter threads.
b. Thread opposite end of stud, with preapplied
locking compound, into crankcase, until specified
height from crankcase surface is achieved. When
threading in studs, use a steady tightening motion
without interruption until proper height is
obtained. Otherwise frictional heat from engaging
threads may cause locking compound to set up
prematurely.
Studs closest to lifters must have an exposed
height of 75 mm (2 15/16 in.).
Studs furthest from lifters must have an exposed
height of 68 mm (2 3/4 in.).
c. Remove nuts and repeat procedure as required.
4. Check that dowel pins are in place and install a new
cylinder head gasket (printing up).
5. Install cylinder head. Match numbers on cylinder
heads and crankcase. Make sure head is flat on
gasket and dowel pins.
6. Lightly lubricate exposed (upper) threads of studs
with engine oil. Install a flat washer and nut onto
each mounting stud. Torque hex nuts in two stages;
first to 16.9 N·m (150 in. lb.), then finally to 33.9 N·m
(300 in. lb.).

Aug 19, 2014 | Craftsman Garden

1 Answer

Water in cylander heads,no visible cracks and no water in oil


for water to get into all cylinder heads the head bolt tension is not as it should be. This comes from mainly 2 items . one is that the head is warped and is not tightening evenly and two the head stud holes are full of water and a hydraulic lock has formed before bolt tension was sufficient to hold the head down. If there is any water /oil or rust /gunk in the holes then the studs bottom out before attaining the proper head tension. Cracks can be under the exhaust valves

Dec 26, 2013 | 2000 Kia Sportage

1 Answer

Cylinder head bolts/studs there threaded on both ends does that mean they come out? yz 80


The cylinder head studs usually have "thread locker" on the engine block end to keep the stud from coming out of the block when the nuts are removed from the upper end. To remove them from the engine block, you need to heat them with a torch to melt the thread locker, then they will back out.

Apr 28, 2012 | Cars & Trucks

1 Answer

Exhast leak 1990 nissan maxima just need gasket diagram


you most likely have broken studs in your cylinder heads. those studs hold the manifold to the head, buut after a while they will break and you have to extract them from the head. not something for novice to be doin, since you may have to be doing some drilling and tapping and if you drill in the wrong manner/way, you can drill into the water jacket, which will create a coolant leak, which can only be fixed by head replacement. i have doone dozens of those manifolds and drilled 100ts of studs.

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1 Answer

What tool would i need to remove cylinder head bolts on a 93 ford escort gt


Hi
A cylinder head removal tool is provided for removing the cylinder head from the engine block of an engine.The tool comprises an elongated bar made of tool steel with means for bolting the bar to the cylinder head and for mounting pusher bolts which can be tightened down onto exposed threaded ends of frozen studs holding the cylinder head. As the bolts are tightened down onto the studs the cylinder head is gradually lifted upward free from the studs.
Thanks for contacting fixya.com

Nov 05, 2009 | 1993 Ford Escort 4 Door

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