Just have a little question that I am trying to get some insight on. I just replaced my timing in my 72 skylark 350 suncoupe. I set the car at TDC before anything was done and then removed the driveshaft after everything was set correctly When I turned the crankshaft to get the timing marks to line up they would not line up at all, but they were kinda close. When I put the new chain and sprockets on I turned the crankshaft slightly to get the timing marks to line up and it went on perfectly. At the same time I also put in a high volume oil pump kit. Now that I have put everything back together, the rotor is not facing the #1 plug anymore and I was wondering if this was due to the fact that the oil pump gear shaft was not put back in the same position, or because I slightly turned the crankshaft to get the timing marks to line up. Also I was wondering if the reason that the timing marks weren't lined up on the old chain was because it was installed wrong by someone before me or if it had possibly skipped a tooth or two on the gear. Before I start the engine is there anything I should do to correct my mistakes.
This is what the marks should look like. Note the position of the keyway in the crank snout. The oil pump has nothing to do with this. If your installation looks like this picture, just pull the distributor and reorient the firing end of the rotor so that it is pointing at #1. You can move the oil pump driveshaft so that it mates with the bottom of the distributor, it can be a little tricky, make sure the distributor drops all the way down.
Z28, Installing a high volume oil pump is a mistake. You do not need it and you will cause excessive wear on your dist. gear. All you need is the stock set up or use the oil booster set-up.
An old chain stretches a lot over time...the main reason why you need to change it. Not necessarily a mistake that it doesn't line up, if less than a full gear toot of mismatch that is. But if the chain is rely stretched, there can be tooth jumping due to that fact, and the engines performance will rely be bad Lars
Oil booster uses a spacer plate on the oil pump housing to allow longer pump gears. More gear surface area means more oil flow. Kit is sold by TA, Postons, Year One etc. I think they sell for $30-40.
George, That is the HV-HP pump that uses the longer gears. It causes alot of wear to the cam gear because of the extra effort it takes to turn those bigger gears. The booster plate redirects the oil within the oil pump cover in such a way as to boost pressure especially at idle. At least that is my understanding of it.
You are correct, I merged the two items. 1. Unit with longer gears is the HV-HP set-up. 2. Unit with plate by itself is the booster plate. Thanks for catching that mistake!:grin:
My Pleasure George:TU: Just wanted to make sure Snowmad got his explanation, he probably hasn't seen it yet anyways:laugh:
link with pic Here is the link to T/A's website with a picture of the booster plate http://www.taperformance.com/pumpkits.htm
zzzzzz....sleeping....... Larry, you are so right ! ..... sleeping at the time yo and George straiten things out :Smarty: ....and the two of you in on it at just a few minutes... :bglasses: Thanx for explaining and for the link :beer Lars
