vn S1 coolant leaking into block and crank not turning
I have recently rebuilt the engine. Ive had te cylinder bored out, over size pistons and rings fitted, crank ground down with oversize bearings. I also baught a set of heads that were apparently shaved and had new valve seats but in with the valves lapped in. I had trouble turning the crank once i had connected the pistons rods and done up the big end bearings. we managed to turnthe crank with a breaker bar then after a fe turns it was turing ok, tight but ok. Now the engine is in the car and it wont budge. I have undone the everyhing again whilts in the car. When i drained the oil i found coolant in the engine. which is my next problem. The coolant and oil was only in the car for a day and the engine never turned so by gravity the coolent has leaked somewhere into my block. When i took the inlet manifold off i found coolant in the inlet port of the middle cylinder driver sider side and it has pooled above the valve in the head. All the seals and gaskets were new, if any one has any idea how the coolent got to where it di that be great. also the small L pipe going from the water pump up to the inlet manifold was bone dry. Anyway back to the crank. I took the sump of, undone 4 bearning caps of the piston rods and loosened the main end bearings so there finger tigh and the crank is still stuck, the wole engine begins to turn of the engine mounts. As for the other two pistons i cant undo them because there up in the block. he other 4 piston puch up and down the cylinders so i cant see it being the pistons. I also undone the timing chain and the cam turns ok but stil the crank wont budge???? whate wrong ith my engine rrrrrrrr
Sounds like somethings going on. Make sure you havent connected a wrong hose to the manifold somewhere, possibly a heater hose or something. I only think that because there was water pooled on top of your valve, had to have come in through the inlet manifold somewhere.
And as to the engine not turning, well only way to find out is pull the motor back out and pull it apart properly and check everything including torque settings on your bolts. If the motor turned over with water in it for a few seconds you could have bent something.
Your big end's need to go in a specific order, they should be labled A B C etc or 123, or colour coded, match them up, tourq them down and itl be fine.
Mate had the same problem, took it to a engine shop, the guy explained this, showed him, put them in the right order, tightened them and he never had a problem since.
For the coolant leak: If the heads were shaved (by how much?) you might try checking the way in which the inlet manifold sits on the heads and the block. With the heads sitting lower on the block, the inlet manifold may not line up with some of the holes in the heads properly.
(It also might be a good idea to check the pushrod and rocker angles are OK with the heads moved closer to the camshaft.)
An alternative is that the head bolts have bottomed in their holes, not crushing the head gaskets (possible but I think unlikely and not if the inlet port has coolant in it).
Some of the inlet manifold bolt holes are through holes and have to have sealer (head stud sealer) applied to the threads, and be clean and dry, to avoid a coolant leak.
Often the inlet manifolds get a ring of corrosion around the coolant passages. This has to be filled with something or the manifold machined. I use a light skim of Loctite Ultrablue, levelled off with a razor blade.
Too much sealant around those coolant passages will hold the manifold off the gaskets and prevent sufficient gasket crush to form a seal.
1. Were the heads crack tested?
2. Was both the block surfaced and the heads shaved at the same time? measurment may need to be taking to ensure manifold fits neatly..( manifold Intake surfaces may need machining to suit.)..
3.all bar 2 head bolts per side seat into water galleries so as mentioned stud sealer is needed..
If in doubt remove/strip start again from scratch..
Floor it and swerve driving skool
thaks for your help il have another look and use what advice I've been given. As for the order of the main bearing caps its a little uclear. They are not labelled but the do have metal stripeson them. One, Two And three stripes and obviously the rear main is an easy one to pick. I was not sure of the order if the 1 is the front or the next one after the rear main. Perhaps that may be a problem, something that i have over looked cheers. If any one could tell me the order that be apreciated.As for the water problem maybe one of the hoses was connected wrong, thats my only thinking either that or the valley cover gaskets are the wrong way if thats possible. It's made of black plastic with a blue silicon strip on it. The manual says they should be labelled up but they werent so i faced the blue up perhaps it neded to be faced down. Any one know.? Also there was no water in the little pipe from the water pump to the manifold so im stil unclear how the water goes into the manifold. Are there aother passeges it travel through? And this is al by gravity so im asuming that there wold not be a crack in the head because it have to be pretty big for gravity to push it up through the head. As for the heads Im not sure if the were shaved, we think there were definately cleaned pofesionally and i put a straight edge to them and they were prefect as was the block, but like i said not sure if they were shaved, they still appear to have alot of meat on them.
ok fixed the crank, one of the lifters has turned side ways and broke on the cam. Explains why it felt stuck, Ive replaced the lifters with hydraulic rollers, should work better now. Still big drama's with the coolant leaking though, I have applied silicon around the entire surface of the gasket on both sides, and still a massive leak. I Can hear a dripping from the top drivers of the engine when i put the coolant into the radiator so its a significant leak, and the engine had not been started so its got to be somethin there no quiet right but im struggling to put my finger on what it is, ive gone through everything i can think off. Only thing may be the heads, I was told they were for a vn Series 1 and the went on fine and the exhaust bolted up to them fine, if they are not a series one would this maybe effect it, i.e. would the water jackets still line up correctly
hay did u drain the coolnt b4 pulled the inlet manifold off? or there might be a low spot on ur inlet manifold around the water jackets because some people use sanding disc's and create a low spot. Good luck
Yes i did drain the engine i took it out of the car, cleaned the crank and the bearing and caps and the sump then put the engine back in. and yes i used a wire brush on a drill to clean the manifold so there would of been low spots for sure but i did apply sealant, do you think i needed more sealant. I only applied a thin coat on, if the amount of sealant was not enough do you think it would still cause that leak. It sounds like its jus pouring in
ok ive just got another manifold from the wreckers, i checked it with a straight edge and its not warped or out of shape, its all square, ive put it on and applied a small amount of sealant and their is still the same leak, water goes straight into the sump. This has made me think what other places can water get in and all i come up with was the front timing cover, perhaps its leaking from the water jackets there. Is this a possibility. Also i spoke to a mate who said something about a seal and a plate located near the rear main seal ;n the actual casting of the block, but i can't picture what he is talking about but he claims its also another way water can get in. can anyone verify what he means.
on holiday
maybe they hit water when the fitted the valve seats or someones ported the heads and gone to far and hit water
I tune the oldschool way fear on the passengers face and knuckle colour cant go wrong
tabbacco is still my favorite vegetable
Hybrids. Cars for fools.
Did you torque the heads down right and put the head gaskets in with the word "front" at the front?
yeah as far as i know i did, and there was no word front on the head, should there of been
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