danglerb

What would really help is if you told us what the motor ID is, post one you said LH cam gear broken, then said it was CIS, then said it has bent valves which doesn't happen on any of the early motors.

Make sure they don't take too much off the heads, there is a minimum spec in the WSM.

If the motor is a US pre 85, then the cams out of your 78 are a better than stock choice.

JEC_31

LH is American auto industry speak for Left Hand.

Fronkenstein

M28/xxx can't remember the rest but if I recall correctly it is the same as the engine in my 78 having checked that all before I purchased the engine. We'll check in the AM for the exact #.

$700 gets jet cleaned, surface grind, valve grind, couple of broken thread repairs and bolt extractions, decarburizing, guide seals. Guides are in spec.

Fronkensteen

karl ruiter

Unless you know something about the state of your CIS parts I would not put the silicon pan gasket in. Major CIS problems (sticking plunger in fuel dist, for example) can lead to hydrolocking with fuel, that eventually seeps past the rings into the oil. Fuel in the oil with destroy a silicon pan gasket. I build a motor for my '79 and it took me a year or so to get it done. In the mean time the fuel in my CIS system gummed up and I ended up having trouble with every major CIS part, so there was and extended period of testing and debugging. During this debugging I ended up with enough fuel in the oil that my brand new silicon pan gasket just melted. In general I think the silicon pan gaskets are a good way to go, but in the particular case of a CIS car where CIS parts have been sitting for a long time I would stick with cork.
It can be difficult to get a reliable seal between the head and the cam towers....some motors will repeatedly blow the gasket out as the reinforcement around the oil feed holes is not that strong. GregB produces a improved head to tower gasket that I highly recommend. As with all of Greg's products they are awesome, priced too low, and not advertised anywhere.

Fronkenstein

Thanks for the info. How does one get in touch with gregb to buy his products?

danglerb

www.precisionmtrwerks.com Greg Brown , Precision Motorwerks, 930 Orangethorpe Ave # F, Anaheim/Fullerton 92801 ph 714-879-9072

Fronkenstein

Thanks everyone for the input I really appreciate it. On the CIS I have two units; one of the car currently running and working fine. As a side of is truly amazing how am this car runs on 7 cylinders. I wonder if it wouldn't be a bad idea to add some light oil to the gasoline every so often to keep all the little check valves in good operating health. I am A MMO fan but not sure if CIS components would be sensitive to a naphtha based product.

Anyway

John Speake

what's the engine code ?

Fronkenstein

Bad injector in #1 took out #5 and #8 as well.

Imo000

What is "decarburizing" and "MMO"?

928 at last

Takin' the carbon deposits off and "Marvel Mystery Oil" I have some if you need any....

Fronkenstein

I am answering the questions asked here but this will be my last response. I have started a thread for the entire project which can be found in the link below my responses.

Motor(s) info:

Original: 1978 M28/01 with 93K miles that had a lean out condition do to a bad injector in cylinder #1. This in turn burned the piston and took out the compression ring. The compression ring pieces are now a permanent part of the top of #1 piston as well as pieces making their way into #5 and #8 holes and damaging those pistons and bores. It's a real shame since dismantling shows a lot of money had been invested recently including; new clutch, pressure plate and flywheel; new water pump; new t-belt; new tensioner and roller; new oil pressure sensor; new exhaust gaskets; new cold-start; etc. As I said the car ran amazingly strong with a dead hole and two damaged holes.

Donor: 1978 M28/01 allegedly 45K miles with broken LH cam and 2 bent valves otherwise no signs of damage or other issues. No sludge inside the crankcase or anywhere else. Extremely clean hardware externally and all cadmium plating in excellent shape leads me to believe the mileage is within reasonable recycle yard statement. I've spent the last 20 years doing archaeological digs for Harley and Indian motor/motocycle hardware;-)

Please follow the project at:

https://rennlist.com/forums/928-foru...ere-we-go.html

Thanks!

Fronkensteen

Imo000

Thanks Rob, whan interesting word.

PRSWILL

Awesome deal and project!