Perkins 4-108 "radiator" cap question

[CaptNemoO2]

Originally Posted by FishyBiz

I have a 1978 Perkins 4-108 low line style that needed a new header tank cap found it at NAPA PART NUMBER 703-1418 fits great about $7.00 it's a 7 psi. It was tough to find a good part number.

Oh man, I wonder if that's the same for my 4.236 lowline? I've been trying to find one.

If you go to Stants website, they list a bunch of cross-references for that cap.
https://partcat.com/stant

[CaptNemoO2]

Can confirm that cap also works for a 4.236 lowline. Got mine from Advance Auto locally. P\N 10282 (branded as Carquest). Thanks FishyBiz for the info!

[Skippadoon]

How do you know if it’s a low line style? I tried to attach a photo I have a leak , slow, doesn’t seem to overheat in gear at the dock but wanna find out why. Oil is good

[Cheechako]

Originally Posted by Skippadoon

How do you know if it’s a low line style? I tried to attach a photo I have a leak , slow, doesn’t seem to overheat in gear at the dock but wanna find out why. Oil is good

I think this first pic is a low line, the second pic is not: