Jump to content

New guy. Here is my Cat


Vovchandr
 Share

Recommended Posts

4 hours ago, Dave W said:

If you look at the wear pattern on the lobes, they are not consistent from one lobe to another. Typically they appear to be simular for any given cam profile. Could actually be the cam grinder did not do a second spark out on the profile? 

Dave w


I see what you mean. Didn’t see any obvious contact patch issues on the intake. 
 

did find this small blemish on exhaust on Cyl1


 

7C11A0F6-A89B-4952-8002-8CBFCA28E160.jpeg

Link to comment
Share on other sites

  • Replies 456
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

That small blemish in the real world probably would not cause any issues. It's the bluing marks on the lobes which indicate a high heat condition. What is causing the high friction? Cam profile, oil or possible oil passage blocked, lifter bucket, possible break-in procedure, machining error ?   That's the million $$$$ question. First, try by eliminating what it is not, starting with the easiest possibility first.

Dave w

Link to comment
Share on other sites

2 hours ago, Dave W said:

That small blemish in the real world probably would not cause any issues. It's the bluing marks on the lobes which indicate a high heat condition. What is causing the high friction? Cam profile, oil or possible oil passage blocked, lifter bucket, possible break-in procedure, machining error ?   That's the million $$$$ question. First, try by eliminating what it is not, starting with the easiest possibility first.

Dave w

 

I see the logic behind there being an unresolved temperature problem.

 

True history of the car use prior to my ownership is unknown and if the headgasket was blown before my ownership it's not out of the realm of possibility that it saw high temperature events prior. At the time of purchase the car had no radiator fan wiring hooked up at all and would over heat very quickly if started. Not sure what capacity previous owner used it like that and for how long. 

 

My best guess at this point is get the head cleaned, get rid of most marks possible, reassemble and check in the future if new ones are forming. 

 

If there is any other advice as to what to look into in the meantime with head being off, I can look into that too. 

Link to comment
Share on other sites

Small update. 

 

Posted on the Focus forums to see if they had any advice.

 

One resonated with me, that potentially VCT on the exhaust cam which is suppositively defeated/deleted is what's throwing the cam alignment off. Didn't seem likely as the cam rear mark lined up with TDC but seemed plausible. Advice was to lock the cam and turn the gear to see if it rotates.

 

I did that and after a little bit of pressure the cam gear started free spinning and the cam stayed in place. After freaking out that I broke something I saw that the bolt was lose and I was able to spin it out by hand. Cam gears aren't keyed on? Just held on by friction? Either way, I didnt resolve whether VCT is a factor bit I did completely throw off the position where the cam used to be. Intake is still uneffected but considering exhaust spun completely out of previous setup i'd have to recreate TDC setup and realign the exhaust to that in order to recreate the previous location of the offset intake cam. 

 

Small theory is that the exhaust cam vs intake is due to the bolt being somewhat lose to begin with? Maybe that caused a slip in timing. Might have even caused a head gasket fail. 

 

More parts on order and on the way, getting ready to commit over to getting the head off this weekend. Do not have a crank/cam timing wheel as I don't think I need it in the end. 

 

Plan is to reassemble everything, 0 the cams out and hopefully the car starts. If it runs half decent, try to get it down to a tuner before track day and get things straightened out. If need be, stuff can be adjusted with new adj cam gears.

Link to comment
Share on other sites

1 hour ago, sf4018 said:

Hope you have more luck than me getting parts quickly, I've been waiting 4 weeks for a pressure regulator!

 

Only thing lost so far is my 620R intercooler from Norway. Been a month out, and 20 days coming from Chicago with no updates... :(

Link to comment
Share on other sites

On 7/20/2021 at 6:51 PM, Vovchandr said:

getting ready to commit over to getting the head off this weekend.

 

Did you remove the head this weekend as planned?  If so, what did you find?

 

Thanks,

John

Link to comment
Share on other sites

3 minutes ago, JohnCh said:

 

Did you remove the head this weekend as planned?  If so, what did you find?

 

Thanks,

John

 

Not quite there yet. Still slight reluctance to commit and checking on availability of parts along with other weekend plans.

 

Borrowed a compressor yesterday to help with the crank nut. Still fighting a few header studs and otherwise crossing T's and dotting I's. 

Link to comment
Share on other sites

Dug into it after work today and got the head off. 

 

Water pump is in one piece. Maybe a little hard to spin if I have to be critical of it 

 

IMG_20210726_210401478.jpg

 

There are little gelatin like pieces all over. Any ideas?

 

 

IMG_20210726_210408393_HDR.jpg

IMG_20210726_223738788_HDR.jpg

IMG_20210726_225339984_HDR.jpg

Link to comment
Share on other sites

That white gunk looks suspiciously like oil/coolant emulsification from when it was running coolant - not sure but I don't like seeing it where it is.  I am concerned about the rusted condition of the coolant galleys in both head and block.  Not sure how best to treat that short of a full tear down.  

 

If the water pump is hard to spin then that might be a sign of a bad or going bad bearing.  Investigate that now.  

 

I am going to ask the innocent question - how will you clean the block top surface so that debris does not fall in the cylinders or cooling galleys or oil galleys?

 

@JohnCh Beer money bet - how many cylinders do you think were breached?

Link to comment
Share on other sites

10 minutes ago, yellowss7 said:

Vlad, what does the head gasket look like?  Any obvious breaches?

 

It doesn't look pretty but no obvious breaches 

 

 

IMG_20210727_044454481.jpg

 

 

IMG_20210727_044523649.jpg

 

IMG_20210727_044528703.jpg

 

IMG_20210727_044535704.jpg

Link to comment
Share on other sites

Hard to tell if it's an artifact of removal or a broken state but the layers of the gasket aren't held well together and are "flaking/delaminating" from each other with relative ease 

IMG_20210727_092437751.jpg

Link to comment
Share on other sites

Have you examined the bores, valve springs, and valve seats yet?  I know the color of the exhaust valves isn't a red flag, but it's interesting that the edges of pistons 2-4 on the exhaust side have matching discoloration.  For the experts, does that point to an issue?  

 

-John

 

Link to comment
Share on other sites

2 hours ago, JohnCh said:

Have you examined the bores, valve springs, and valve seats yet?  I know the color of the exhaust valves isn't a red flag, but it's interesting that the edges of pistons 2-4 on the exhaust side have matching discoloration.  For the experts, does that point to an issue?  

 

-John

 

 

I believe you mean the intake side? The little browning on 2-3 & 4. 

 

I haven't done anything with the head. Plan is to give it to a shop and let them figure it out. Pressure test it, clean it, level it etc. There isn't much I can do with it on my own.

 

I glanced at the springs and they did all appear to be intact from what I could see. 

Link to comment
Share on other sites

9 minutes ago, Vovchandr said:

I believe you mean the intake side?

 

Yes, thanks for catching that.  It does look odd.  Is it only on 2-4?

 

643642990_vladpiston(2).jpg.4b1dafeeade1799bf1afe87444adf874.jpg

 

-John

 

 

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...