Overheated engine = engine problems?

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12 Sep 2012 00:25 #548181 by XL777
Replied by XL777 on topic Overheated engine = engine problems?
Ok back up a sec.
1. Yes there are pools of oil in all buckets. They are hard to see from te angle of my pics since I was looking to the lob.
2. No tests have been done to determine oil preassure.
3. I'm assuming the cam wear is from poor oil circulation when it over heated combined with the 10-15min of riding times after the fresh oil.

2012 Triumph Bonneville SE black

1978 KZ1000 B2 LTD
Fresh top end rebuild
Rebuilt head
Wiseco 1015 pistons
Dyna s
Green Dyna coils
Wired george mod


It is easier to say what I haven't replaced then what I have.

I must love this cruel mistress since she hates me

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12 Sep 2012 00:30 - 12 Sep 2012 00:46 #548183 by bountyhunter
Replied by bountyhunter on topic Overheated engine = engine problems?

XL777 wrote: Ok back up a sec.
1. Yes there are pools of oil in all buckets. They are hard to see from te angle of my pics since I was looking to the lob.

There should be a deep puddle of oil under the cam lobe. The lobe damage looks like it either ran out of oil or had insufficient oil flow.

1979 KZ-750 Twin
Last edit: 12 Sep 2012 00:46 by bountyhunter.

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12 Sep 2012 01:45 #548199 by zukdave
Replied by zukdave on topic Overheated engine = engine problems?
If that's a new rebuild you cooked your shit into junk.
look at the pic.'s there's burnt oil sludge every were
the cam's are wiped out I wouldn't run them.
I bet the ring's done shit the bed too.

1980 KZ650 F1
ZX750A1 motor.
Wiseco 810cc kit.
Zukiworks racing ported head.
VM 29 smooth bore's.
Dyna 2000 Ign. w/Dyna mini coil's
APE cylinder stud's and nut's.
APE valve spring's.
APE Track King clutch.
V/H KZ1000 sidewinder.
3.5x18 laced to a KZ1000 disk hub.
150/60/18 Shinko 006 Podium.
63" wheel base.

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12 Sep 2012 04:00 - 12 Sep 2012 04:05 #548215 by bountyhunter
Replied by bountyhunter on topic Overheated engine = engine problems?
Something I strongly recommend:

1) pull the spark plugs and use the kick starter to crank the engine over until your arm gets tired and see if you can pump clean oil up into the top cam wells (under the cam lobes) just to verify good oil flow into that area.

2) visually inspect the tops of the cam lobes after wiping clean with acetone. See if they look "wiped" or abrased like they do in the pictures here. Just wondering if that funny looking thing might be an artifact of the flash?

I ask because I see it on the back of the cam lobe where wear would be unlikely.

What I don't see is anywhere near enough oil. On mine I have to siphon the oil out before I can use my pad removal tool because there is a lake of oil under the camshaft.

1979 KZ-750 Twin
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Last edit: 12 Sep 2012 04:05 by bountyhunter.

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  • Motor Head
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  • FIX UP YOUR BIKE RIGHT AND CHEAP
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12 Sep 2012 10:18 - 12 Sep 2012 10:19 #548235 by Motor Head
Replied by Motor Head on topic Overheated engine = engine problems?

bountyhunter wrote: Something I strongly recommend:

1) pull the spark plugs and use the kick starter to crank the engine over until your arm gets tired and see if you can pump clean oil up into the top cam wells (under the cam lobes) just to verify good oil flow into that area.

2) visually inspect the tops of the cam lobes after wiping clean with acetone. See if they look "wiped" or abrased like they do in the pictures here. Just wondering if that funny looking thing might be an artifact of the flash?

I ask because I see it on the back of the cam lobe where wear would be unlikely.

What I don't see is anywhere near enough oil. On mine I have to siphon the oil out before I can use my pad removal tool because there is a lake of oil under the camshaft.


+1
Crank it over, and watch for oil. Pull a Bearing cap and Inspect. Scored?
You need a Low Pressure gauge to check oil pressure on the roller bearing 1000 engine. 0-10 psi would be good, or 0-25.

1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Last edit: 12 Sep 2012 10:19 by Motor Head.

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