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Head gasket replacement

3.7K views 15 replies 6 participants last post by  Joey_Twowagons  
#1 ·
Hello, this is my first post but I have been frequenting this forum since I acquired a 1997 Ford escort wagon a couple months ago.

My apologies if this is a bit long-winded but I am at a point where I am absolutely stumped and it's driving me crazy.

The car is a 1997 Ford escort wagon 2.0 SPI sohc. I got the car from a family member I was told that they had overheated the engine pretty badly, so I ran a compression test and I found the numbers definitely indicated a head gasket, they were: cylinder 1:20psi 2:40psi 3:55psi 4:105psi. So I replaced the head gaskets and got a head from a local wrecking yard the car that they had came from had 135,000 miles on the odometer and a sticker under the hood that said the timing belt have been changed within about 10,000 miles, after truing the head ( adhesive sandpaper on a piece of granite countertop). I installed it on the car and it ran just fine, I let it idle for about 45 minutes and drove it slowly around my property, then I took it out on the highway for a test drive everything seemed fine once I began climbing a small hill I heard it ticking sound whenever I got on the throttle as soon as I got off it would just Coast with no sound, because I was going up a hill I couldn't just let it Coast so I got on the throttle and it lost all power and the engine shut off, I towed it back to the house ran a compression test and the numbers were as follows: 1: 90 psi 2-4: about 30psi or less. I should also mention I did notice that the timing belt had jumped a few teeth, so that is pretty much where I am at I did run a wet compression test and it did not change the numbers at all, thank you for your guys's help any advice is much appreciated
 
#9 ·
I did install the belt clockwise on the sprockets because it was easier that direction without the tensioner is set up, is there a reason why I should install it that way other than it just made more sense? And I remember rotating the engine around One Time by hand and the timing marks were both facing straight up when I got back to the top, it is my understanding that these engines are not interference or do you think something could have got to damage when it slipped some teeth on the timing and shut off while test driving? How's the car sits right now both timing marks are in line with each other is there still any reason to take off the belt and reset it on there, thank you for your responses it is greatly appreciated
I have rebuilt several 2nd gen escorts. With three of them I had the block out to get the cylinders honed for installing new rings on the original pistons, had the machine shop mill the top of the block down about .006", to give me a really flat surface, and got a head that had been rebuilt. Then bolted it back together, with new head bolts of course, and with a new timing belt and tensioner. Its still running well, 16 years later and about 80,000 miles. Also new bearings and main seals, and replaced all five of the freeze plugs in the block.
Do you think having the block shaved down was crucial as far as making a tight seal between the head and block or do you think it would have been able to seal without shaving? I shaved the original head down by hand and used a 4 ft level in my smallest feeler gauge to check for flatness, that head was so out of whack took me about 15 hours if you get it shaved flat, I also lapped the valves and ported and polished the intake and combustion Chambers, but when I went to the valves back in I noticed all four of the valve guides on the exhaust side had cracks or chunks missing from the part that sticks past the head I wasn't sure how critical that was so I decided not to use it it just took a different head from the junkyard, this car only has 80,000 miles on it so I'm thinking the pistons and rings and bottom end should be in good enough shape, attempted to just to the old head back together and maybe see if I can trim down the valve guides that have the cracks, what do you think? Once again thank you for the replies
 
#8 ·
I have rebuilt several 2nd gen escorts. With three of them I had the block out to get the cylinders honed for installing new rings on the original pistons, had the machine shop mill the top of the block down about .006", to give me a really flat surface, and got a head that had been rebuilt. Then bolted it back together, with new head bolts of course, and with a new timing belt and tensioner. Its still running well, 16 years later and about 80,000 miles. Also new bearings and main seals, and replaced all five of the freeze plugs in the block.
 
#11 ·
I have used felpro head gaskets without issues. The reason I got the block 'decked' was due to darkened areas on the side toward the exhaust valve and signs of rust (reddish) on the drivers side front corner of the block, around that corner head bolt. On a couple of my rebuilds this head bolt broke off during removal of the head, and even though I put a thread cutting tap down into the head bolt holes, seeing the signs of corrosion on multiple engine blocks, and enough corrosion to cause that corer headbolt to seize into the head, was why I wanted to ensure a flat shiny surface. My machinist recommended it to me the first time, or I might not hwve thought of it mself.
 
#12 ·
Yesterday I took extra time and make sure I set the timing and the timing belt correctly, I thought I had found the problem when I thought my timing marks were off, turns out they were not so still scratching my head as to why the engine is making such low compression. Right now I'm leaning towards the valves because when I rotate the engine by hand I cannot find a single spot that will hold air when I blow into each cylinder through the spark plug hole. Yesterday walking through one of the local wrecking yards I found a 2002 escort with the SPI engine I didn't know that they used that motor that late. It looked to be in decent shape and right now it is half off weekend at pick and pull, should that head bolt right up to my engine being that they are about 5 years apart? I would imagine that the newer head would be a slightly improved design, the only thing I could see different was the design of the timing belt, but I don't think it is different enough to not work.
 
#13 ·
I think all years Escort SPI cylinder heads are interchangeable, however there is a different Focus SPI head, the difference being the intake manifold bolt pattern and possibly a motor mount connection.

Edit: From Engine Builder magazine:

"1997-’02 Escort – The original split-port head (c/n F7CE-AA) that came out in ’97 was used for the Escort until it was finally discontinued in 2002."