Hi all.
Need you advice.
I was in a search of 99MY 4.6l P38 in a mint condition for some time. Saw one recently and start to talk to the seller. We agreed on a compression and sniff tests. Test were done today by friend of him (independent garage), result is OK ( kind of).
145,130,130,130,...123,137,,130,130psi. It is low compare to some other results reported in here. Tests were performed with the device which looked like a pistol, it had an extended tube with rubber header. Header was pressed by HAND to the spark plug hole. Mechanic said the engine is perfect. (Spark plugs were all looking good, not washed out)
After that things started to go wrong. All plugs went back OK except one. It was on the left bank ( if you stand in front of the car, looking towards engine), third from you, second from firewall. Mechanic was trying to put it back like 20 times back and forth. He was doing like half a turn by hand, then it was getting tight and he continued with rachet for 1 or 2 turns ( 3-4 times changing positions after 90 degree turn). At this point it was clear that it was not in the thread, he backed up, repeated again and again.
His boss came up with threader and after some attempt they got it right. I think it was a couple of top thread lines which were affected. Then it was more. They didn't clear shavings from inside of the cylinder and put spark plug in, which went OK and was tightened with same torque as the others.
After that they did started the engine, it sounded very good. After the engine was warm, they performed sniff test, which was also OK.
I have a test drive scheduled for tomorrow. Should I worry about the engine?
Sorry for the long post, as I thought these details are relevant.
Need you advice.
I was in a search of 99MY 4.6l P38 in a mint condition for some time. Saw one recently and start to talk to the seller. We agreed on a compression and sniff tests. Test were done today by friend of him (independent garage), result is OK ( kind of).
145,130,130,130,...123,137,,130,130psi. It is low compare to some other results reported in here. Tests were performed with the device which looked like a pistol, it had an extended tube with rubber header. Header was pressed by HAND to the spark plug hole. Mechanic said the engine is perfect. (Spark plugs were all looking good, not washed out)
After that things started to go wrong. All plugs went back OK except one. It was on the left bank ( if you stand in front of the car, looking towards engine), third from you, second from firewall. Mechanic was trying to put it back like 20 times back and forth. He was doing like half a turn by hand, then it was getting tight and he continued with rachet for 1 or 2 turns ( 3-4 times changing positions after 90 degree turn). At this point it was clear that it was not in the thread, he backed up, repeated again and again.
His boss came up with threader and after some attempt they got it right. I think it was a couple of top thread lines which were affected. Then it was more. They didn't clear shavings from inside of the cylinder and put spark plug in, which went OK and was tightened with same torque as the others.
After that they did started the engine, it sounded very good. After the engine was warm, they performed sniff test, which was also OK.
I have a test drive scheduled for tomorrow. Should I worry about the engine?
Sorry for the long post, as I thought these details are relevant.