Looking For Opinions...

CapeX5 · #1 03-21-2021, 09:16 PM

So, I picked up another 2003 4.6 recently. Imola Red, 189K(I KNOW!)overall ok condition. Bought it in non running condition, $2k. He broke the threaded part of the vanos solenoid housing off and tried to glue it back on. Moron, to say the least. Said it was running, solenoid came loose and he parked it. I took it apart this weekend and on the 5-8cylinder head, the vanos unit and timing wheel bolt had backed out. Right away, I am like, oh shit. Turned it over by hand and the intake came is not moving. Compression test, nothing. Intake manifold off, all 8 intake valves bent. Did compression test on 1-4 side and have 140psi+. So, I am going to take the head off, get a valve job. Remove the pan, take a couple of rod caps off and look at bearings. The guides were supposedly done recently, I will confirm. Will be taking valve cover off 1-4 side and will do the cam timing on reassembly. I have a couple of spare heads. Does anyone know if the heads/cams are unique to the 4.6? And, thoughts on my plan? I am going to be doing valley pan and other associated gaskets while I am there to assure they are all new. Took a gamble on this one, and got bit a little bit, but I am hoping worth the effort.

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x5Alpine · #2 03-22-2021, 02:15 AM

good on you for saving a 4.6is. too many are with lazy owners who part them out. The cams and Vanos are unique to the 4.6is.

guntherrex · #3 03-22-2021, 09:35 AM

sounds like amayor project... but it's a great looking car and I know from experience they are lots of fun to drive

andrewwynn · #4 03-22-2021, 10:49 AM

I helped rebuild m62tu where chain broke while running. About 1/3 the valves bent but we bought the car for $950 and had a spare parts engine so took off both heads and harvested enough valves to make a working motor.

Look on realoem for part number on the head it will show what other models use it.

We were able to mix and match heads so we picked two of the four that looked the best but didn't need machining. Heads were not damaged from the bent valves.

I spun each valve in a drill to confirm which were still ok. Some slightly bent were hard to tell.

Oh I also used steel wool and scotch bright to clean each valve while spinning in the drill.

Nolimite39 · #5 03-22-2021, 11:10 AM

Ouch, but good on you for saving her. I actually broke the threaded part of the distribution piece on mine when reassembling it. Immediately after slapped myself and went on ECS to get a replacement.

crystalworks · #6 03-22-2021, 12:55 PM

Tried to glue it on? That's a new one.

Good on you for saving it. Looks like a nice truck from that one shot.

CapeX5 · #7 03-22-2021, 04:58 PM

Andrew, I do have spare heads, interesting thoughts. Was going to take to machine shop for a complete valve job, but if I scavenge 8 good intakes from the other heads, give them a good "lapping", I could be good to go! You have me thinking. Took head off today, pics to follow....

Quote:

Originally Posted by andrewwynn

I helped rebuild m62tu where chain broke while running. About 1/3 the valves bent but we bought the car for $950 and had a spare parts engine so took off both heads and harvested enough valves to make a working motor.

Look on realoem for part number on the head it will show what other models use it.

We were able to mix and match heads so we picked two of the four that looked the best but didn't need machining. Heads were not damaged from the bent valves.

I spun each valve in a drill to confirm which were still ok. Some slightly bent were hard to tell.

Oh I also used steel wool and scotch bright to clean each valve while spinning in the drill.

CapeX5 · #8 03-22-2021, 05:10 PM

Took head off today. Pistons look fine, but I am pretty sure when you take the cam out, valves aren't supposed to stay open.....Someone also stripped the vanos bolt that goes into the cam. And cam timing is so far off on 1.4 side it isn't even funny. I really wish people that can't afford or don't know what they are doing just stay away from projects like this. A little angry at peoples stupidity!!!

CapeX5 · #9 03-22-2021, 05:11 PM

Everyday, I repeat, "you can't fix stupid..."

Quote:

Originally Posted by crystalworks

Tried to glue it on? That's a new one.

Good on you for saving it. Looks like a nice truck from that one shot.

CapeX5 · #10 03-22-2021, 05:14 PM

Yes, you did it the right way! This f$%(*#*# moron was told by a shop to glue it.....he said it worked for a while. I just can't comprehend someone being that stupid to even consider repairing it that way. As soon as I saw the timing wheel and bolt backed out on to the timing cover, I knew it wasn't good.

Quote:

Originally Posted by Nolimite39

Ouch, but good on you for saving her. I actually broke the threaded part of the distribution piece on mine when reassembling it. Immediately after slapped myself and went on ECS to get a replacement.

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