Must Read....PSA for Windsor Roller block guys - Ford Mustang Forums : Corral.net Mustang Forum

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post #1 of 86 Old 03-10-2012, 11:31 PM Thread Starter
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Must Read....PSA for Windsor Roller block guys

There is a cracking problem that is becoming an epidemic, and its only among the 351 roller blocks, the F4TE. We are averaging 2-3 cracked blocks for every 10 we get in. The crack is in the same spot every single time.

The cracks are noticed easily by eye when you remove the number 2 and number 4 cam bearing. Its not a coincidence that this is the same area that is used for the spider tray hold down. You can clearly see the cracks in the picture.

A problem will arise if this crack runs, the cam bearing will lose press and the bearing will walk out quickly and its all down hill from there.

I can guarantee alot of shops will use the block, whether they overlook it or think its not a big deal. I do NOT use these blocks. If you are having your roller windsor block machined, tell your machinist you want to see this area, protect yourself.

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post #2 of 86 Old 03-11-2012, 04:06 AM
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Might be a good idea to post this on the lightning forums as well, as every lightning has these blocks from 1993 1/2 to 95.

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post #3 of 86 Old 03-11-2012, 10:00 AM
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post #4 of 86 Old 03-11-2012, 10:17 AM
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What causes them? Have you ever actually seen a failure from these cracks?

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post #5 of 86 Old 03-11-2012, 10:37 AM Thread Starter
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What causes them? Have you ever actually seen a failure from these cracks?
No idea what causes them, its odd because the roller 302 has the same design and I do not see the cracking like the 351.

I haven't had any failures, but if a guy wants to chance it and throw 600-700 hp through the block and twist it up, I guarantee the crack will run

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post #6 of 86 Old 03-11-2012, 12:41 PM
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This is great news for me thanks Woody!

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post #7 of 86 Old 03-11-2012, 01:01 PM
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What years have the f4te?

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post #8 of 86 Old 03-11-2012, 01:53 PM
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Isn't it all the 351 Roller blocks? Making me scared. Is it possible to see the crack with the cam bearings installed? I was already planning for a Dart block over this next winter.

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post #9 of 86 Old 03-11-2012, 01:56 PM
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What years have the f4te?
1993.5-1997
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post #10 of 86 Old 03-11-2012, 02:29 PM Thread Starter
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Isn't it all the 351 Roller blocks? Making me scared. Is it possible to see the crack with the cam bearings installed? I was already planning for a Dart block over this next winter.
Cam bearing has to be out to see the crack


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post #11 of 86 Old 03-11-2012, 05:35 PM
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Damn...glad i didnt buy that used 387ci stroker f4te short block lol. Thanks for the find and the info. I wonder if the NON roller blocks will be affected if converted to roller?

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post #12 of 86 Old 03-11-2012, 05:46 PM Thread Starter
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I figured I would post it as an FYI, dont mean to create mass hysteria guys. Deep breath.

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post #13 of 86 Old 03-11-2012, 05:55 PM
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lol....sorry im a little light headed after moving a 5.0off a trailer with no engine hoist.

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post #14 of 86 Old 03-13-2012, 03:15 PM
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Good thing I still had my bare block for my 408 still on the stand for prep. Thanks for the heads up!
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post #15 of 86 Old 03-13-2012, 11:19 PM
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so a motor with lower hp should be safe?

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post #16 of 86 Old 03-13-2012, 11:48 PM Thread Starter
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so a motor with lower hp should be safe?
No idea, run at your own risk

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post #17 of 86 Old 03-17-2012, 09:27 PM
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Great call Woody!
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post #18 of 86 Old 03-20-2012, 12:56 PM
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Just out of curiocity Woody- Is there anything you can do to further prevent a good block from cracking in this area? I figure the cam journals are hard to get to for chamfering...?

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post #19 of 86 Old 03-20-2012, 01:53 PM Thread Starter
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Not that I am aware of

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post #20 of 86 Old 03-20-2012, 11:04 PM
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My block is from a 93, not sure if lightning or not. I did a full inspection before assembling mine and found no cracks. Fingers crossed mine doesnt crack.

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post #21 of 86 Old 03-20-2012, 11:14 PM Thread Starter
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If its a roller block, regardless what it was from its suspect.

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post #22 of 86 Old 03-23-2012, 11:06 AM
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So under 600 hp should be alright?????

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post #23 of 86 Old 03-23-2012, 02:50 PM Thread Starter
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Cant and wont say, use at your own peril. I give them to my scrap guy, I cant and wont chance it for my customers.

Look at it this way, the crack developed with 200hp

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post #24 of 86 Old 04-01-2012, 08:12 AM
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Hey Woody, what blocks are you using for your 408-418 strokers?

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post #25 of 86 Old 04-01-2012, 02:35 PM Thread Starter
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F4 or Early cores.

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post #26 of 86 Old 04-02-2012, 07:10 PM
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Cant and wont say, use at your own peril. I give them to my scrap guy, I cant and wont chance it for my customers.

Look at it this way, the crack developed with 200hp
What are the chances that a block without the crack will develope the crack when rebuilt to double or even tripple the 200hp that some are developing cracks at?

Does this concern you when sending out engines that you know will be up in that power range?

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post #27 of 86 Old 04-02-2012, 07:13 PM
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What are the chances that a block without the crack will develope the crack when rebuilt to double or even tripple the 200hp that some are developing cracks at?

Does this concern you when sending out engines that you know will be up in that power range?

Thanks!
X2

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post #28 of 86 Old 04-02-2012, 07:40 PM Thread Starter
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No it doesnt concern me, if these block that have 100k miles on them dont already have the crack, they wont develop them IMO. I believe the crack is a result of the environment in which these engines are used. Buses, trucks, vans etc.. How many hired drivers simply just keep driving them when the temp gauge is pegged? Once it overheats and wont run then they pull it over call a tow truck.

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post #29 of 86 Old 04-04-2012, 10:02 AM
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Woody - in post 23 you said you give them to your scrap guy. Yet in post 25 you responded to a question about what blocks you use to build strokers, and you said "F4 or earlier". Are you saying you still use these blocks and only send the cracked ones to your scraper?

Your post came just in time for me. My F4TE was at the machine shop getting freshened up for my 408. I mentioned this issue and asked them to inspect this area thoroughly. Thanks Woody.

I agree with your analysis - drivers of "fleet/work" vehicles abuse them.
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post #30 of 86 Old 04-04-2012, 11:55 AM
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Interesting. Never ran into a problem with one but it's something I'll sure check for from now on.

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post #31 of 86 Old 04-04-2012, 07:17 PM Thread Starter
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Yes I give the cracked ones to my scrap guy, the non cracked ones I use, like any other stock block. I see more of these blocks than 99% of guys in there entire lifetime, so it took a bit to see a pattern form.

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post #32 of 86 Old 04-25-2012, 09:44 PM
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Cracked F4TE

Well, I got the bad news today from the machine shop my F4TE block is cracked exactly like the pictures Woody posted.

I am pretty sure the engine was in a farm truck that was abused. Hopefully I can find a good F4TE, older core, or maybe a Ford Racing 351W Sportsman block.
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post #33 of 86 Old 05-11-2012, 06:17 PM
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Well sh*t. I just put my engine together and back in the truck....What to do what to do
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post #34 of 86 Old 05-14-2012, 06:54 PM
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Well sh*t. I just put my engine together and back in the truck....What to do what to do
Run it till it blows up. Enjoy it while it lasts. C'est la vie!

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post #35 of 86 Old 06-10-2012, 12:09 PM
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dam...i just put one in my car @ 11:1 with a 80 mm hairdryer..and i havent even got it runnin yet....i guess one of two things are about to happen....lmao..i have another on the stand,for back up....i will check that one!!! if its bad,i guess i will have to invest in a good block...how much for an ironeagle?
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