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Old September 1st, 2010, 08:06   #1
Carl2k7
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Default Hows my cam looking Guru's or.. anyone who can tell cam wear...





thanks for any help guys, sorry about the qualit of the pictures had to take them from an old phone..

whilst i have the rocker cover off, is it wise for me to re-torque my head bolts ?, there pressure in the coolant bottle even before its been started, if so whats the torque rating on these bolts ?

Carl
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Old September 1st, 2010, 08:12   #2
GR40RCapri
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Carl,

looks like all the chamfer is there...in the 2nd pic there's a little funk on the end of the right lobe, but, it could be just the picture, as everything looks good to go..

what is the car????

retorque the bolts? how many miles? i don't think it would warrant doing, unless the gasket, etc was recently changed... but up to you. not sure of the torque.

J
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Old September 1st, 2010, 08:18   #3
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You are getting micropitting on the lobe tips from excessive wear.

This exposes a rough surface that can damage the lifter tops.

How many miles of w30 oils has this car had?
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Old September 1st, 2010, 08:23   #4
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Where the heck do you see that?? They look darn near brand new to me!
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Old September 1st, 2010, 08:36   #5
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The tip of the lobe is all messed up. I see it.
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Old September 1st, 2010, 08:49   #6
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Quote:
Originally Posted by nate379 View Post
Where the heck do you see that?? They look darn near brand new to me!
Second picture, right lobe.
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Old September 1st, 2010, 08:49   #7
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I saw the pits on the lobe tip as well..

is this car a 2002?

I dont know if I would replace the cam without seeing more damage than what is on that one lobe. do other lobes have that micro pitting showing on the tips? are the chamfers wearing away on any other tips? if so then I would recommend to replace the cam when the timing belt gets done.

if the pits are only on the one lobe, and there are no other signs of wear, I would recommend a good 5w40 oil like the lubro moly or the mobil 1 TDT product and regular inspections for expansion of the wear and decide to replace the cam at a later time. the parts for the ALH arent nearly as expensive as on the PD cars, and if you know what you are doing with the timing belt system, swapping a cam isnt a huge deal on them.
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Old September 1st, 2010, 14:50   #8
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if that's pitting on one of those tips, replace the cam/lifters ASAP
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Old September 1st, 2010, 17:07   #9
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The engine is is a year 2001.5 ALH with 141k
as long as the cam wear wont cause nothing catastrophic in the next 30k, my car has a 30k service history gap..
ill probably only have the car another year..

is it worth re-torquing the bolts?, would this help with the pressure im having in my coolant bottle?

thanks guys
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Old September 2nd, 2010, 07:00   #10
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carefully inspect your lifters for tiny cracks radiating out from the center of the lifter face....almost looks like the cam lobe tips were dinged by a tb failure or a misinstall...kinda hard to tell from the pics though
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Old September 2nd, 2010, 07:18   #11
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I've seen that cam wear in other ALHs that run their OCI WAY too long. It is usually accompanied by black stains on the rear inside wall of the cylinder head, which will not happen if the OCI is correct and the correct oil is used. As DBW said, a 30 weight oil might also allow this to happen if its film strength is not up to par.

I would not wait 30K, as the cam lobes in that condition can lead to a follower failure. Its a roll of the dice.

Do not re-torque your head bolts. If the pressure in your cooling system builds immediately AFTER startup, then you may have an issue. If you have a head gasket that is already leaking combustion gasses, re-torquing the head will not correct the situation.

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Old September 2nd, 2010, 20:31   #12
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retorquing the head bolts used to be the norm with the very older V diesels that used non TTY bolts . Not needed since 84 or so
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Old September 4th, 2010, 23:11   #13
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I suggest you jump on that before it gets worse. Mine left intake valve on cylinder 3 stuck closed. Could have been much worse if it stuck open!

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Old September 5th, 2010, 02:57   #14
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T- you got your money out of that cam..
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Old September 5th, 2010, 12:11   #15
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What other problems might I be looking a with a cam in this condition?,

Big end failue?

Worn piston rings?

Thanks for the input guys
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