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Re: 2003 saab 9-5 replaced head gasket because of...
Disconnect computer and drive it ,if it drives ok then nothing wrong with it,after test drive put your hand held plug in gizmo under wheels and drive over it for what use it is.Skimmed head and new head bolts ?you must have more money than sense didnt you check it with a straight edge first??then clean it with a flat bed sander.head bolts ?? more expense .only expense should have been head gasket and antifreeze with a tube of instant gasket.Have you put all the little vac pipes back on that open the flaps on the air con and left the one off on the valve between the inlet and exhaust manifolds.Also did you remove and grind in the valves ??
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When you replace the rocker cover gaskets, clean the surfaces where the gasket contacts the heads and the rocker cover with alcohol and a rag. Make sure there is absolutely no oil residue on either surface. Use a silicon sealer and spread it on the side of the gasket that will touch the head. Position it and use the head bolts temporarily as guide pins to hold the gasket in place until the sealant dries COMPLETELY. Remove the bolts. Now put more sealant on the surface of the rocker cover and install the cover on the gasket gently so as not to disturb the gasket. Install the cover bolts and tighten firmly but not so as to squeeze or deform the gasket. If dine correctly, the gasket will not leak.
this is a major piece of mechanical work as you seem to be aware, i would suggest if you feel confident to do it yourself get a workshop manual that will give a step by step guide and the correct torques etc , you wont know if the head needs recon until its off but if it has'nt been overheated time and time again it should be fine , also depending on mileage as to wether the valves need regrinding and new seals , i would do this as well while the head is off as is best practice to carry out further maintenance when the oppourtunity is there also change the timing belt and tensionor ,you can probably hire the correct tools needed as buying would cost quite a bit to be used only once so there is a lot to consider so i wish you good luck and keep me up to date please.Also bear in mind the age and condition of vehicle against cost of repair might be better to trade in keeping the head problem to yourself!
Yes, you can just do one head gasket, although I wouldn't recommend it. If the head gasket has failed, it's usually because the engine has overheated. If you know that the engine has overheated, it would be best to do both heads. When an engine overheats, the head warps a little. It doesn't take much to change the internal pressures on the gasket, and when the gasket area between the cylinders starts to lighten up a little, the gasket fails. To do the job properly, take the head(s) to a qualified automotive machine shop and have the head resurfaced. Even a slightly warped head will be unable to keep a head gasket. After a head has been resurfaced, it's relatively easy to put it back together. NOTE!! The machine shop will tell you the proper torque and torque sequence. Usually start from the center and work your way out evenly, going from side to side, and top to bottom, but get specific information for YOUR engine from the machine shop. NEVER replace a head gasket without having the head resurfaced.
If you are replacing the gasket, are you doing a complete head job or just the gasket? If you are only doing the gasket and not having the head resurfaced(machined), That could very well be your problem. Does the gasket blow in the same place everytime? That is why if so. If you have been resurfacing every time you replace your gasket, and its been done more than twice, you need another head. Now to answer your question, Yes, It would be very wise to replace the head bolts with new. If I remember right, that engine has stretch bolts that have a one time use only limit on them. I could be wrong but I think if you already have that much of your engine apart, might as well spend a few more bucks to make sure everything is rite.
how did the diesel get in there? are you sure its diesel fuel or is it motor oil? then it could be head gasket problem. Or trans fluid, which would make it milky pink? Then it could be the trans cooler in the radiator leaking. If someone accidently put diesel fuel in it then just flush it out. If it has been in there long enough to start ruining hoses then replace those. why does he say gaskets? how does it run? does it overheat? then maybee head gaskets. and resurface heads.
without mechanical knowledge, best left to a garage. if you have a bit of knowhow then do an assessment of what is connected to the head, inclusive of exhaust manifold and fuel inlet manifold, wiring etc.Once you decide how to do it, note where all bolts and wires go.Clean every bit of old gasket off all faces and as the head is alloy get a head skim from a motor factor or machine company. You will need a new set of cylider head bolts and full head gasket set. Torque settings , however will need to be obtained along with the head bolt sequence for retightening
Almost for sure the head gasket. You don't have to replace the engine, but pull the head, have it leveled, get a new gasket and head bolts and replace.
This can be done without removing the engine, but it is a bit tricky. Very tight getting the head off to the front. If you have done some mechanics, can be done. I have done this once. It did take a bit.
Please let me know if you still have the car and we can talk.
Could be a few other issues, but these are very rare. Cracked head, etc...