If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
BB 366 - rockers clatter; oil pressure but no oil at rockers
Hi - I'm working on my farm's chevy 87 c-70 w/ 366 v8 (which came out
of an early 1970's era truck). The motor runs and has good oil pressure (according to the gauge) but there is no oil coming out of the pushrod tubes and the valves are very noisy as a result. What would cause this to be? There is only a little trickle of oil coming out the pushrods for the number 1 piston (the front one on the drivers side), none at the rest. I'm noticing it now because I just had the head off the drivers side to fix a broken exhaust valve and once it was all put back together the noise was terrible; before taking the head off there was no noise but still hardly any oil coming out the tubes. I pulled the oil pan off and the pump looks fine - no plugged screen or damage. I also pulled off the bearing cap on a couple of the pistons and that looked ok - no visible problem. A local motor shop told me that if the cam or cam bearings were bad we might have oil at the back (closest to firewall) tubes but none torwards the front. SO - I'm at a loss. All and any help is greatly appreciated. |
Ads |
#2
|
|||
|
|||
BB 366 - rockers clatter; oil pressure but no oil at rockers
Distributor 180 deg out?
" > wrote in message oups.com... > Hi - I'm working on my farm's chevy 87 c-70 w/ 366 v8 (which came out > of an early 1970's era truck). The motor runs and has good oil > pressure (according to the gauge) but there is no oil coming out of the > pushrod tubes and the valves are very noisy as a result. > > What would cause this to be? There is only a little trickle of oil > coming out the pushrods for the number 1 piston (the front one on the > drivers side), none at the rest. I'm noticing it now because I just > had the head off the drivers side to fix a broken exhaust valve and > once it was all put back together the noise was terrible; before taking > the head off there was no noise but still hardly any oil coming out the > tubes. > > I pulled the oil pan off and the pump looks fine - no plugged screen or > damage. I also pulled off the bearing cap on a couple of the pistons > and that looked ok - no visible problem. A local motor shop told me > that if the cam or cam bearings were bad we might have oil at the back > (closest to firewall) tubes but none torwards the front. SO - I'm at a > loss. > > All and any help is greatly appreciated. > |
#3
|
|||
|
|||
BB 366 - rockers clatter; oil pressure but no oil at rockers
I don't know - how could I tell?
|
#4
|
|||
|
|||
BB 366 - rockers clatter; oil pressure but no oil at rockers
Had this happen more than once .Try backing them off while it's
running one at a time and see if the oil will come through . Sometimes they get partially collapsed and won't pump up after they've "sat" for a bit . |
#5
|
|||
|
|||
BB 366 - rockers clatter; oil pressure but no oil at rockers
Ok - I can try that. Will post back later.
|
#6
|
|||
|
|||
BB 366 - rockers clatter; oil pressure but no oil at rockers
" > wrote in message oups.com... > Hi - I'm working on my farm's chevy 87 c-70 w/ 366 v8 (which came out > of an early 1970's era truck). The motor runs and has good oil > pressure (according to the gauge) but there is no oil coming out of the > pushrod tubes and the valves are very noisy as a result. > > What would cause this to be? There is only a little trickle of oil > coming out the pushrods for the number 1 piston (the front one on the > drivers side), none at the rest. I'm noticing it now because I just > had the head off the drivers side to fix a broken exhaust valve and > once it was all put back together the noise was terrible; before taking > the head off there was no noise but still hardly any oil coming out the > tubes. > > I pulled the oil pan off and the pump looks fine - no plugged screen or > damage. I also pulled off the bearing cap on a couple of the pistons > and that looked ok - no visible problem. A local motor shop told me > that if the cam or cam bearings were bad we might have oil at the back > (closest to firewall) tubes but none torwards the front. SO - I'm at a > loss. > > All and any help is greatly appreciated. > You might go to a local autozone and "loan a tool" the oil pump primer tool. You put it in place of your distributor and use a drill to spin the oil pump shaft to give you oil pressure without running the top of your engine without any lubrication. -Bruce |
#7
|
|||
|
|||
BB 366 - rockers clatter; oil pressure but no oil at rockers
" > wrote in message oups.com... > I don't know - how could I tell? No oil to the lifters. |
#8
|
|||
|
|||
BB 366 - rockers clatter; oil pressure but no oil at rockers
Chas Hurst wrote:
> Distributor 180 deg out? Right.....the motor runs, but the dist may be 180 out? Where do you guys come up with these guesses? Even with the dist 180 out, what does that have to do with the oil pressure? Ian |
#9
|
|||
|
|||
BB 366 - rockers clatter; oil pressure but no oil at rockers
"shiden_kai" > wrote in message news:eoX4f.218877$1i.108812@pd7tw2no... > Chas Hurst wrote: > > > Distributor 180 deg out? > > Right.....the motor runs, but the dist may be 180 out? > Where do you guys come up with these guesses? > Even with the dist 180 out, what does that have to > do with the oil pressure? > > Ian It's not a guess but a foggy remembrance of some engine that has a distributor body that impedes the flow of oil to the lifters if fitted correctly. If fitted incorrectly it blocks the flow of oil completely. Now do you have some advice for the OP? |
#10
|
|||
|
|||
BB 366 - rockers clatter; oil pressure but no oil at rockers
"shiden_kai" > wrote in message news:eoX4f.218877$1i.108812@pd7tw2no... > Chas Hurst wrote: > >> Distributor 180 deg out? > > Right.....the motor runs, but the dist may be 180 out? > Where do you guys come up with these guesses? > Even with the dist 180 out, what does that have to > do with the oil pressure? > > Ian That guess is so far off it can't even be described as "wild assed" Bob |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Starting Problems | McNick | Jeep | 12 | October 1st 05 03:58 AM |
Low oil pressure | Papa | VW water cooled | 30 | July 12th 05 01:56 AM |
2000 TJ: Low Oil Pressure After New Oil Pump | Josh | Jeep | 8 | June 21st 05 07:15 PM |
Oil pressure gauge sticking on start-up in cold weather? | Azfreeflyer | Ford Explorer | 6 | December 27th 04 03:22 PM |
'99 Explorer Fuel pressure problem | Tim South | Ford Explorer | 2 | December 20th 04 05:49 PM |