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#1
03-06-2024, 09:41 AM
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No lubrification on three cams!!
Hello there,
So my D24 didn’t die , but it was close. A terrible rattle started some days ago. I was thinking about the vaccum pump s tappet, And was right. It did not want to be removed…iit was totally stuck. So I removed it And noticed that two cams were dry and went through severe heat. The engine still runs perfect. Why the hell these cams are not gratified with oil!? Hope you folks are doing alright ! 
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#3
03-07-2024, 09:12 AM
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Bummer to hear. Possible the engine was run low on oil sometime in the past maybe?
Do you have any pictures? Cross fingers that the bore in the cylinder head where the vacuum pump pushrod goes through is not scored up. The pushrod can be replaced, and so can the cam and followers, easily enough. But if there is any issue with the condition of the aluminum head casting, that would be a different challenge. Although -- even that would be pretty easily solvable by just eliminating the vacuum pump and using an external electric vacuum pump. Several folks have done that and it works just fine. So, don't despair!  There are solutions to this kind of situation. But let us know if we can assist. Pictures would help us understand better what you are facing.
__________________
86 745 D24T/ZF 345k lifted 2.5" 83 764 D24T/M46 155k
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#10
03-09-2024, 04:23 AM
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thank you everyone for your messages
as you can see,on the two last pictures, the iron fillings of the tappet, mixed with the oil, produced a strange mud, very thick, on the intake manifold i put a deposit that i took off with my bare fingers, it has the consistence of solid patch. I was warned not to use pressurized air as the dirt could go everywhere in the circuit, but that thing was so sticky and hard that i took ni risking using the compressor, then some cleaning, and repeat the process several times. so yes, it is clear that due to this mixture, oil could not go through the middle of the head. some cams received severe burns but i was told it is not a problem. the motor still runs very smoothly, with a nice sound. Problem is, I cannot use the brakes, and volvo 1257207 simply does not exist on ANY market . I already used 2 second hand pumps that filled up themselves with oil and i dont want in any case to hear again this terrible rattle that might break the camshaft, because of a used tappet. V8, I dont understand the word "bore"; it only means "annoying" to me. are you speaking about the hole of the tappet? if it is the case, yeah, it's ruined, as you can see. I had no choice but to use a big vise-grip plyer and hit it hard with a hammer and a big screwdriver to make the tappet fall down. I didnt think about it in the first time but for sure there will now be some play if i put on a new tappet... I heared of the electrical pump and i am willing to go for it. But I truly lack the skills to think about how i could do the job straight. I would be happy to benefit from the informations, and I'd be glad to pay for a service of remote assistance to help me install this new kind of pump. If one is able and willing to help me directly, don't hesitate to PM me
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