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Guest		#1 Posted : Tuesday, 28 August 2007 6:09:32 AM(UTC)
Rank: Guest Groups: Guests Joined: 2/09/2015(UTC) Posts: 43,977 Was thanked: 5 time(s) in 5 post(s)		Hi guys, Ill be concise as possible, no oil pressure on mechanical gauge, pulled the line from the pump and cranked (no plugs), still nothing, not even a dribble from the pump. No holes in block, no horrible noises, no oil pressure. Happened on overrun at trap speed over 110mph. What are your thoughts? What else can I check? Thanks for your time. Phill

Guest		#2 Posted : Tuesday, 28 August 2007 6:14:11 AM(UTC)
Rank: Guest Groups: Guests Joined: 2/09/2015(UTC) Posts: 43,977 Was thanked: 5 time(s) in 5 post(s)		so concise I left out the important bit, holden 308 stroked to 355, solid cam etc. No prior indication of crook pressure, 55psi hot, revved to 6000, warmed up good and proper before giving it plenty.Thanks, Phill

Munromad2004		#3 Posted : Tuesday, 28 August 2007 6:55:33 AM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 24/04/2005(UTC) Posts: 718		oil pump drive shaft broken? Unbolt the oil pump and take a look.
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johnperth		#4 Posted : Tuesday, 28 August 2007 9:02:21 AM(UTC)
Rank: Veteran Reputation: Groups: Registered, Veteran Joined: 1/03/2005(UTC) Posts: 1,991 Was thanked: 2 time(s) in 2 post(s)		i had a similar problem with 253 berlina, never found out what was wrong, it cured itself after a couple of days, but I was not hammering it. (although the problem happened after doing a long hard run)
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Guest		#5 Posted : Tuesday, 28 August 2007 6:05:48 PM(UTC)
Rank: Guest Groups: Guests Joined: 2/09/2015(UTC) Posts: 43,977 Was thanked: 5 time(s) in 5 post(s)		Thanks for the tip, the oil pump is coming off today, i'll check it to blueprint specs, i'll check the drive shaft by turning it against the gear (if that makes sense) if it turns I know i've broken it because the cam is stationary. Is there a way of chec

Guest		#6 Posted : Tuesday, 28 August 2007 6:05:48 PM(UTC)
Rank: Guest Groups: Guests Joined: 2/09/2015(UTC) Posts: 43,977 Was thanked: 5 time(s) in 5 post(s)		Thanks for the tip, the oil pump is coming off today, ill check it to blueprint specs, ill check the drive shaft by turning it against the gear (if that makes sense) if it turns I know ive broken it because the cam is stationary. Is there a way of checkin

Dr Terry		#7 Posted : Tuesday, 28 August 2007 6:36:38 PM(UTC)
Rank: Veteran Reputation: Groups: Moderator, Registered Joined: 1/03/2005(UTC) Posts: 6,114 Thanks: 1 times Was thanked: 219 time(s) in 199 post(s)		quote: Originally posted by johnperth i had a similar problem with 253 berlina, never found out what was wrong, it cured itsel
		If at first you don't succeed, just call it Version 1.0
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Guest		#8 Posted : Tuesday, 28 August 2007 8:44:51 PM(UTC)
Rank: Guest Groups: Guests Joined: 2/09/2015(UTC) Posts: 43,977 Was thanked: 5 time(s) in 5 post(s)		I pulled the oil pump, turned it with a screwdriver on the bench and oil spewed out everywhere, I guess the pumps fine. I then turned my attention to the driveshaft in the block, it has "free play" of about 90 degrees before it stops (back and forth). Cou

Dr Terry		#9 Posted : Tuesday, 28 August 2007 9:54:11 PM(UTC)
Rank: Veteran Reputation: Groups: Moderator, Registered Joined: 1/03/2005(UTC) Posts: 6,114 Thanks: 1 times Was thanked: 219 time(s) in 199 post(s)		Hi Phil. It sounds like a problem with the gear or its drive pin on the other end of the oil pump drive shaft (near the cam). It could also be the plate that controls the shaft's end float. You will have to at least remove the front cover & water pu
		If at first you don't succeed, just call it Version 1.0
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Dr Terry		#10 Posted : Tuesday, 28 August 2007 9:54:11 PM(UTC)
Rank: Veteran Reputation: Groups: Moderator, Registered Joined: 1/03/2005(UTC) Posts: 6,114 Thanks: 1 times Was thanked: 219 time(s) in 199 post(s)		Hi Phil. It sounds like a problem with the gear or its drive pin on the other end of the oil pump drive shaft (near the cam). It could also be the plate that controls the shafts end float. You will have to at least remove the front cover & water pum
		If at first you don't succeed, just call it Version 1.0
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Sandman		#11 Posted : Wednesday, 29 August 2007 7:37:24 AM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 5/07/2005(UTC) Posts: 349		Some aftermarket cams are incompatable metals with the oil pump drive gears. A friend of mine just built an 355 and had the same problem. Chewed up a new oil pump drive gear in aprox hour or so running time. Id have to check with him to find out what he
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Sandman		#12 Posted : Wednesday, 29 August 2007 7:37:24 AM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 5/07/2005(UTC) Posts: 349		Some aftermarket cams are incompatable metals with the oil pump drive gears. A friend of mine just built an 355 and had the same problem. Chewed up a new oil pump drive gear in aprox hour or so running time. I'd have to check with him to find out what he
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johnperth		#13 Posted : Wednesday, 29 August 2007 8:50:33 AM(UTC)
Rank: Veteran Reputation: Groups: Registered, Veteran Joined: 1/03/2005(UTC) Posts: 1,991 Was thanked: 2 time(s) in 2 post(s)		quote: Originally posted by Dr Terry quote:<
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Guest		#14 Posted : Wednesday, 29 August 2007 9:24:32 PM(UTC)
Rank: Guest Groups: Guests Joined: 2/09/2015(UTC) Posts: 43,977 Was thanked: 5 time(s) in 5 post(s)		Hi guys, after pulling the engine I took off the timing case. The oil pump drive gear is stripped almost completely. What would have caused such a failure? Could the cam be too hard? Its a come grind solid. How can I prevent this from happening again? The

jabba		#15 Posted : Wednesday, 29 August 2007 9:56:24 PM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 17/04/2005(UTC) Posts: 465		Might be worth just checking the mesh of the teeth (i.e. are the cam and pump drive different spacings). Also, as mentioned previously, the contruction of the oil pump drive vs cam gear could be an issue. __________________________________________
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HK1837		#16 Posted : Wednesday, 29 August 2007 10:07:09 PM(UTC)
Rank: Veteran Reputation: Groups: Moderator, Registered, Veteran Joined: 1/03/2005(UTC) Posts: 14,898 Thanks: 1 times Was thanked: 558 time(s) in 533 post(s)		quote: Originally posted by johnperth quote:
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Guest		#17 Posted : Thursday, 30 August 2007 12:33:15 AM(UTC)
Rank: Guest Groups: Guests Joined: 2/09/2015(UTC) Posts: 43,977 Was thanked: 5 time(s) in 5 post(s)		quote: Originally posted by jabba Might be worth just checking the mesh of the teeth (i.e. are the cam and pump drive differen

johnperth		#18 Posted : Thursday, 30 August 2007 7:48:16 AM(UTC)
Rank: Veteran Reputation: Groups: Registered, Veteran Joined: 1/03/2005(UTC) Posts: 1,991 Was thanked: 2 time(s) in 2 post(s)		Think you can buy new gears anyway. Byron I bought the VK with the 253 motor in it already, thinking it was a 308 but never checked the motor. Then wondered why it was so gutless and checked it. The car was only 3 years old and 1 owner so assume it was
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