motor out... what seals to change?

G50911 · 02-08-2014, 03:59 PM

i just got my new to me motor and am planning some freshening up while its out. mainly ignition and carb conversion (it had a CIS in it). here's a couple pics of CIS off and 40's on. i'm planning on swapping out the "triangle of death" seals along with the front and rear mains.

anything else you can think of while its out?

it's an early '75

nickyclyde · nickyclyde's Garage

No advice , but I love the looks of a pretty car bed engine. Gonna build one some day!

b5aar · 02-08-2014, 08:05 PM

Nice....Just finished an engine out with my 930. Intermediate shaft cover gasket...oil cooler ....also did chain cover gaskets...oil line into tensioner o-rings...valve cover gaskets...Your engine looks tight though

G50911 · 08:58 AM

cool thanks for the info. few more q's...

1) anyone have experience with jet coat for the headers? im wondering how durable it is considering the need to rest the motor on the headers when dropping/installing it.
2) i also want to get a new fan pulley since the one it had was the dual set up (i think one belt was for air which is long gone).
3) anyone have experience with the performance crank pulleys that change the fan speed for better cooling?

JFairman · 02-09-2014, 03:27 PM

Supertech makes a real nice gold color single pulley with timing marks on it.
Nice motor.. washing machine too. I think you can wash the car covers in that type washer if they ever need it.

Walt Fricke · 02-09-2014, 08:09 PM

You've got the pulley part backward. Performance crank pulleys are smaller, so they drive the fan (and alternator) slower. This reduces parasitic loss, but also reduces the amount of air the fan pumps. For a race car, you don't care about alternator performance, as a you aren't running lights, heater blowers, radios, and seldom even the windshield wipers.

You might consider keeping the fan pulley. It has that hole you can use with a spanner (tool) to turn the crank via the pulley and fan belt, which is awfully convenient. But maybe you can get one for just one belt which has that feature? The one belt ones in my stable are all from earlier models which require a different tool to stick into pairs of holes on the face of the pulley disk, and that is problematic if you don't have the early fan which had the corresponding number of larger holes rather than the more numerous and smaller holes in the later fans (these holes are for cooling the alternator, I believe).

lf it were me, and everything looked OK, I'd leave the IS gasket and the oil cooler seals alone. If it doesn't leak, why fix it? This is a race motor, and you can expect to take it out more than once more in your racing lifetime. I've never had leaks from either of these locations. The cooler seals are captured. Of course, with the engine out, not that big a deal to so one or both.\

The tensioner oil lines use crush washers, and if they aren't leaking, I'd leave them alone. Crush washers don't lose their crush or tear or whatnot. In fact, I've had good luck generally just reusing the oiling line washers a number of times. The fuel pump washers were the only ones I remember giving me trouble for some reason.