1 bar is atmospheric....not sure what the comp ratio of the THOR 4.6 is off head, but those readings would suggest around 10:1 (and at 14.7 PSI to 1 bar....thats around 147 - 155 PSI) so I'd think they ain't too shabby and aslong as they are all in the same ballpark I wouldn't worry....
Do you have a specific reason to do a rebuild?
Do you have a specific reason to do a rebuild?
boycie
Active Member
Thanks Saint the car runs spot on does not use any oil or water and will sit in traffic until the cows come home with the temp gauge just below the middle ,I bought it 2 years ago from a member on here and it has not missed a beat since the oil light goes off with in a second or two of turning the key,BUT when warmed up and idling there is a chattering light tapping noise its fine until normal temp no loud knocking just this light clatter I am wondering if it could be the timing chain .
*could* be chain slap - but even when stretched on the Rover V8's, they are not *usually* loud enough to be heard over the engine running to any degree...maybe a little rattle.
*could* be tired hydraulic cam followers getting a little loose or their oil ways getting a tad blocked up with old oil and sludge deposits.
If she runs sweet, no overheating, smooth and powerful....I'd leave the heads well alone.
Cam followers and chain can be done with heads on....when was the oil last changed?
*could* be tired hydraulic cam followers getting a little loose or their oil ways getting a tad blocked up with old oil and sludge deposits.
If she runs sweet, no overheating, smooth and powerful....I'd leave the heads well alone.
Cam followers and chain can be done with heads on....when was the oil last changed?
boycie
Active Member
The oil was changed about 300 miles ago I change it about every 3 to 4000 miles as we only use the car at weekends .The wife really loves the car it is ideal for us drop the suspension get the dogs in the back plenty of room , we take them to a load of differe
nt woods press the button up goes the suspension ,we do a bit of green laning now and again press the button again suspension goes up for greenlanning ,we can get all our walking gear and the dogs in it I even have a Carannex that goes on the back so we can stay away for a couple of days .Just don't what it going tits up because I am sure I will get a right ear bashing .
nt woods press the button up goes the suspension ,we do a bit of green laning now and again press the button again suspension goes up for greenlanning ,we can get all our walking gear and the dogs in it I even have a Carannex that goes on the back so we can stay away for a couple of days .Just don't what it going tits up because I am sure I will get a right ear bashing .
boycie
Active Member
Its really hard to be precise about the noise ,I don't think its coming from the valve train if that's what you are thinking it seems to be lower down in the engine the sump area .I have a print out of Saints write up on changing the big and main ends so I may change them and put a new cam and chain in .I have an oil filter sandwich plate in the garage which I will fit next week so I can connect a oil pressure gauge and check the oil pressure .
I bought one of those Gunson electronic stethoscopes off the Bay for £20 the other day. It is excellent for tracking down noises as long as you can access places!
MrGorsky had a tick that turned out to be the head blowing.
There's the oil pump in the front cover too, IIRC. If oil light staying on for a second or two I wonder if that might be worn or blocked up? I seem to remember several channels in that front cover that could get blocked. Is the pressure release valve in there too?
MrGorsky had a tick that turned out to be the head blowing.
There's the oil pump in the front cover too, IIRC. If oil light staying on for a second or two I wonder if that might be worn or blocked up? I seem to remember several channels in that front cover that could get blocked. Is the pressure release valve in there too?
boycie
Active Member
Now that is a bloody good idea Grrrrrr I will order one .Oil light goes out within a second or two of turning the key never comes back on while the engine is running.I think I will change the main and big ends later on just to be on the safe side while I have it in bits I will put a cam ,chain and sprockets in . I have put a 2 1/2 inch stainless exhaust on it and it sounds the nuts ,I live in a small Cul de sac and most the neighbours came out to listen to the car when I started it after fitting it if I go green lanning almost every one say how nice it sounds COULD IT BE ME ?.
tomcat59alan
Well-Known Member
Boys and their toys
. My latest is a blood pressure monitor.
. My latest is a blood pressure monitor.
Wazzajnr
Well-Known Member
No need for a blood pressure monitor when you own a P38, you know full well your blood pressure is going to be off the scale most of the time!
boycie
Active Member
I thought it was just me ,we went out to the car a while back put the dogs in the back got in turned the key light's came on turned to start nothing tried a couple of times nothing" that's it the key has gone out of sync" I am flapping around got the bonnet up listening for the click Jackie says "why don't you put it in park and try again " what a plonker yes it started straight away .
PPP38vouge
Active Member
Done that a few times.
brianp38dse
Well-Known Member
What's park
tomcat59alan
Well-Known Member
Perv.you will get locked up.
Boys and their toys
Got one of those too, although my mother usually has it.
